Pub Date : 2023-08-11DOI: 10.1080/23746149.2023.2244541
Si-Qi Liu, Delong Li, Jun Li, Hao Wang, Yun-Ting Bu, Jie Su, J. Chen, Shibo Cheng
ABSTRACT As a special class of stable atomic clusters, the superatom has become an exciting research topic in recent decades. They can mimic the chemistry and physics of individual atoms in the periodic table and find potential applications in a variety of fields. Traditional strategies for superatom design, however, have their own limitations. Herein, we review recent progress in the discovery of novel methodologies for superatom design, namely external-field regulated strategies (EFRS). We begin with a description of the basic concept of the superatom and the conventional electron-counting rules for superatom design, followed by a discussion of recent exploration about external-field regulated superatoms, where the oriented external electric field (OEEF), the ligand field, and the solvent field are presented. In the concluding section, we discuss the benefits and challenges of the EFRS together with some future research topics.
{"title":"External-field regulated superatoms","authors":"Si-Qi Liu, Delong Li, Jun Li, Hao Wang, Yun-Ting Bu, Jie Su, J. Chen, Shibo Cheng","doi":"10.1080/23746149.2023.2244541","DOIUrl":"https://doi.org/10.1080/23746149.2023.2244541","url":null,"abstract":"ABSTRACT As a special class of stable atomic clusters, the superatom has become an exciting research topic in recent decades. They can mimic the chemistry and physics of individual atoms in the periodic table and find potential applications in a variety of fields. Traditional strategies for superatom design, however, have their own limitations. Herein, we review recent progress in the discovery of novel methodologies for superatom design, namely external-field regulated strategies (EFRS). We begin with a description of the basic concept of the superatom and the conventional electron-counting rules for superatom design, followed by a discussion of recent exploration about external-field regulated superatoms, where the oriented external electric field (OEEF), the ligand field, and the solvent field are presented. In the concluding section, we discuss the benefits and challenges of the EFRS together with some future research topics.","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47302856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-30DOI: 10.1080/23746149.2023.2235060
Diana Yu, E. Pahl
ABSTRACT Enormous progress has been made in high-pressure research over the last decades in both, experiments and computer simulations, many challenges still remain. This is evidenced by controversial experimental and numerical data even for the simplest atomic systems exhibiting different types of bonding. Here we discuss the determination of the solid–liquid co-existence (melting) lines reviewing the computational techniques for studying the high-pressure melting of atomic systems based on molecular dynamic or Monte Carlo algorithms. Some emphasis is put on presenting the parallel-tempering Monte Carlo method that gives direct access to heat capacity curves and entropic information as a function of temperature allowing for an easy detection and interpretation of the melting transition. For molecular dynamics simulations there exist a variety of methods to extract melting information – here we include a more thorough discussion of thermodynamic integration as it is frequently used for high-pressure melting. Applications of these techniques and discussion for different atomic systems are presented including an overview of experimental and numerical results of the weakly, van-der-Waals bond noble gases, of diamond as a representative for covalent bonding and of alkali metals and iron. We conclude by summarizing some outstanding problems and challenges for numerical simulations.
{"title":"Melting of atomic materials under high pressures using computer simulations","authors":"Diana Yu, E. Pahl","doi":"10.1080/23746149.2023.2235060","DOIUrl":"https://doi.org/10.1080/23746149.2023.2235060","url":null,"abstract":"ABSTRACT Enormous progress has been made in high-pressure research over the last decades in both, experiments and computer simulations, many challenges still remain. This is evidenced by controversial experimental and numerical data even for the simplest atomic systems exhibiting different types of bonding. Here we discuss the determination of the solid–liquid co-existence (melting) lines reviewing the computational techniques for studying the high-pressure melting of atomic systems based on molecular dynamic or Monte Carlo algorithms. Some emphasis is put on presenting the parallel-tempering Monte Carlo method that gives direct access to heat capacity curves and entropic information as a function of temperature allowing for an easy detection and interpretation of the melting transition. For molecular dynamics simulations there exist a variety of methods to extract melting information – here we include a more thorough discussion of thermodynamic integration as it is frequently used for high-pressure melting. Applications of these techniques and discussion for different atomic systems are presented including an overview of experimental and numerical results of the weakly, van-der-Waals bond noble gases, of diamond as a representative for covalent bonding and of alkali metals and iron. We conclude by summarizing some outstanding problems and challenges for numerical simulations.","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48401964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-20DOI: 10.1080/23746149.2023.2234136
Zixian Hu, Changxu Liu, Gui-Jun Li
ABSTRACT Metasurfaces, the planar version of artificial structured media at sub-wavelength scale, provide the ability to manipulate light wave in a naturally unavailable way. They offer an unprecedented platform for a plethora of applications ranging from holography, imaging, optical communication to nonlinear light source and quantum computing. Conventionally and straightforwardly, metasurfaces are prepared in ordered configuration, aiming at reducing the geometric fluctuations to guarantee a good performance as designed. On the other hand, the inevitability of fabrication imperfection in nanophotonics and unique properties of disorder have been inspiring the exploration of the metasurfaces with novel design. To supplement the comprehensiveness in review for metasurfaces, here, we overview the mechanisms, characteristics and related applications of disordered metasurfaces, concentrating on recent progresses from light manipulation to energy harvesting and beyond. Besides reviewing the achievements in a wide range of applications with disordered metasurface, we provide an outlook on their future developments. With unique features, disordered metasurface may be a promising alternative for the ordered ones, especially for the practical requirement for large-scale production.
{"title":"Disordered optical metasurfaces: from light manipulation to energy harvesting","authors":"Zixian Hu, Changxu Liu, Gui-Jun Li","doi":"10.1080/23746149.2023.2234136","DOIUrl":"https://doi.org/10.1080/23746149.2023.2234136","url":null,"abstract":"ABSTRACT Metasurfaces, the planar version of artificial structured media at sub-wavelength scale, provide the ability to manipulate light wave in a naturally unavailable way. They offer an unprecedented platform for a plethora of applications ranging from holography, imaging, optical communication to nonlinear light source and quantum computing. Conventionally and straightforwardly, metasurfaces are prepared in ordered configuration, aiming at reducing the geometric fluctuations to guarantee a good performance as designed. On the other hand, the inevitability of fabrication imperfection in nanophotonics and unique properties of disorder have been inspiring the exploration of the metasurfaces with novel design. To supplement the comprehensiveness in review for metasurfaces, here, we overview the mechanisms, characteristics and related applications of disordered metasurfaces, concentrating on recent progresses from light manipulation to energy harvesting and beyond. Besides reviewing the achievements in a wide range of applications with disordered metasurface, we provide an outlook on their future developments. With unique features, disordered metasurface may be a promising alternative for the ordered ones, especially for the practical requirement for large-scale production.","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48692595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-26DOI: 10.1080/23746149.2023.2220363
F. Bencivenga, F. Capotondi, L. Foglia, R. Mincigrucci, C. Masciovecchio
ABSTRACT The recent construction of free electron lasers allows extending laboratory-based laser experiments to shorter wavelengths, accessing wavevectors typical of nanoscale dynamics and adding element and chemical state specificity by exploiting electronic transitions from core levels. The high pulse energies available ensure that this new wavelength range can be advantageously used for nonlinear optics, as in the pioneering case of transient grating spectroscopy: a time-resolved four-wave mixing technique in which two pump pulses are crossed at the sample to generate a spatially periodic excitation whose dynamics is monitored via diffraction of a probe pulse. We will show how extreme ultraviolet photon pulses have been successfully deployed in the last seven years to carry out transient grating experiments, mainly performed at the FERMI free electron laser, addressing a variety of scientific questions, ranging from the study of thermal transport in semiconductors approaching the ballistic regime to the modelling of ultrafast demagnetization at the nanoscale. We will also discuss possible future developments of the transient grating method specifying the impact this could have in various fields of scientific research ranging from molecular chirality to spintronics.
{"title":"Extreme ultraviolet transient gratings","authors":"F. Bencivenga, F. Capotondi, L. Foglia, R. Mincigrucci, C. Masciovecchio","doi":"10.1080/23746149.2023.2220363","DOIUrl":"https://doi.org/10.1080/23746149.2023.2220363","url":null,"abstract":"ABSTRACT The recent construction of free electron lasers allows extending laboratory-based laser experiments to shorter wavelengths, accessing wavevectors typical of nanoscale dynamics and adding element and chemical state specificity by exploiting electronic transitions from core levels. The high pulse energies available ensure that this new wavelength range can be advantageously used for nonlinear optics, as in the pioneering case of transient grating spectroscopy: a time-resolved four-wave mixing technique in which two pump pulses are crossed at the sample to generate a spatially periodic excitation whose dynamics is monitored via diffraction of a probe pulse. We will show how extreme ultraviolet photon pulses have been successfully deployed in the last seven years to carry out transient grating experiments, mainly performed at the FERMI free electron laser, addressing a variety of scientific questions, ranging from the study of thermal transport in semiconductors approaching the ballistic regime to the modelling of ultrafast demagnetization at the nanoscale. We will also discuss possible future developments of the transient grating method specifying the impact this could have in various fields of scientific research ranging from molecular chirality to spintronics.","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46018377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-02DOI: 10.1080/23746149.2023.2197623
Morgan Robinson, Carina T Filice, D. McRae, Z. Leonenko
ABSTRACT The cell membrane is a fundamental biological structure, which is only 6–10 nm thick. It is composed of hundreds of lipid types, which form small and dynamic lipid domains or rafts. These rafts are thought to be a major aspect of cell organization, to provide support for various transmembrane proteins and are central to the communication of cells with their environs. Understanding the functions of lipid rafts presents an exciting opportunity to understand the molecular mechanisms of biologically important processes, as well as to uncover fundamental molecular mechanisms of membrane-associated diseases. Due to the high complexity of cell membranes, model membranes composed of synthetic lipids have been developed and are widely used to mimic biomembranes in an effort to study the structure and dynamics of lipid domains and their role in cell function. Atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM) and atomic force spectroscopy (AFS) significantly advanced the study of nanodomains in model lipid membranes and monolayers. We review applications of these methods to the study of model membranes, which are widely used to mimic eukaryotic and bacterial cells, as well as neuronal cellular membranes in Alzheimer’s disease (AD). Graphical Abstract
{"title":"Atomic force microscopy and other scanning probe microscopy methods to study nanoscale domains in model lipid membranes","authors":"Morgan Robinson, Carina T Filice, D. McRae, Z. Leonenko","doi":"10.1080/23746149.2023.2197623","DOIUrl":"https://doi.org/10.1080/23746149.2023.2197623","url":null,"abstract":"ABSTRACT The cell membrane is a fundamental biological structure, which is only 6–10 nm thick. It is composed of hundreds of lipid types, which form small and dynamic lipid domains or rafts. These rafts are thought to be a major aspect of cell organization, to provide support for various transmembrane proteins and are central to the communication of cells with their environs. Understanding the functions of lipid rafts presents an exciting opportunity to understand the molecular mechanisms of biologically important processes, as well as to uncover fundamental molecular mechanisms of membrane-associated diseases. Due to the high complexity of cell membranes, model membranes composed of synthetic lipids have been developed and are widely used to mimic biomembranes in an effort to study the structure and dynamics of lipid domains and their role in cell function. Atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM) and atomic force spectroscopy (AFS) significantly advanced the study of nanodomains in model lipid membranes and monolayers. We review applications of these methods to the study of model membranes, which are widely used to mimic eukaryotic and bacterial cells, as well as neuronal cellular membranes in Alzheimer’s disease (AD). Graphical Abstract","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48671287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-24DOI: 10.1080/23746149.2023.2228018
M. Ferraro, F. Mangini, M. Zitelli, S. Wabnitz
The input power-induced transformation of the transverse intensity profile at the output of graded-index multimode optical fibers from speckles into a bell-shaped beam sitting on a low intensity background is known as spatial beam self-cleaning. Its remarkable properties are the output beam brightness improvement and robustness to fiber bending and squeezing. These properties permit to overcome the limitations of multimode fibers in terms of low output beam quality, which is very promising for a host of technological applications. In this review, we outline recent progress in the understanding of spatial beam self-cleaning, which can be seen as a state of thermal equilibrium in the complex process of modal four-wave mixing. In other words, the associated nonlinear redistribution of the mode powers which ultimately favors the fundamental mode of the fiber can be described in the framework of statistical mechanics applied to the gas of photons populating the fiber modes. On the one hand, this description has been corroborated by a series of experiments by different groups. On the other hand, some open issues still remain, and we offer a perspective for future studies in this emerging and controversial field of research.
{"title":"On spatial beam self-cleaning from the perspective of optical wave thermalization in multimode graded-index fibers","authors":"M. Ferraro, F. Mangini, M. Zitelli, S. Wabnitz","doi":"10.1080/23746149.2023.2228018","DOIUrl":"https://doi.org/10.1080/23746149.2023.2228018","url":null,"abstract":"The input power-induced transformation of the transverse intensity profile at the output of graded-index multimode optical fibers from speckles into a bell-shaped beam sitting on a low intensity background is known as spatial beam self-cleaning. Its remarkable properties are the output beam brightness improvement and robustness to fiber bending and squeezing. These properties permit to overcome the limitations of multimode fibers in terms of low output beam quality, which is very promising for a host of technological applications. In this review, we outline recent progress in the understanding of spatial beam self-cleaning, which can be seen as a state of thermal equilibrium in the complex process of modal four-wave mixing. In other words, the associated nonlinear redistribution of the mode powers which ultimately favors the fundamental mode of the fiber can be described in the framework of statistical mechanics applied to the gas of photons populating the fiber modes. On the one hand, this description has been corroborated by a series of experiments by different groups. On the other hand, some open issues still remain, and we offer a perspective for future studies in this emerging and controversial field of research.","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44944122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-28DOI: 10.1080/23746149.2023.2175623
Paulo C. D. Mendes, Yizhen Song, Wenrui Ma, Terry Z. H. Gani, K. Lim, S. Kawi, S. Kozlov
ABSTRACT Nanoparticles composed of metallic cores encapsulated in oxide shells emerged in the last decade as an attractive class of nanocomposite materials due to their high stability and unique properties provided by the high contact area between the metal and oxide components. Diverse metal-oxide interactions in metal@oxide core@shell nanoparticles enable tuning their electronic structure, spectroscopic properties, and surface reactivity for applications in sensing, electrochemistry, batteries as well as thermal and photocatalysis. Herein, we review the recent literature on the synthesis, characterization, simulations, and applications of metal@oxide nanocomposites. In particular, we discuss how the properties of metal@oxide nanoparticles can be tuned for a given application by changing the size of the metal core, the thickness and porosity of the oxide shell, as well as their composition, e.g. by alloying the core or doping the shell. Understanding of structure-property relations in metal@oxide systems provides vast opportunities for the rational design of advanced metal@oxide nanocomposites, making this class of materials promising for a wide range of applications. Graphical abstract
{"title":"Opportunities in the design of metal@oxide core-shell nanoparticles","authors":"Paulo C. D. Mendes, Yizhen Song, Wenrui Ma, Terry Z. H. Gani, K. Lim, S. Kawi, S. Kozlov","doi":"10.1080/23746149.2023.2175623","DOIUrl":"https://doi.org/10.1080/23746149.2023.2175623","url":null,"abstract":"ABSTRACT Nanoparticles composed of metallic cores encapsulated in oxide shells emerged in the last decade as an attractive class of nanocomposite materials due to their high stability and unique properties provided by the high contact area between the metal and oxide components. Diverse metal-oxide interactions in metal@oxide core@shell nanoparticles enable tuning their electronic structure, spectroscopic properties, and surface reactivity for applications in sensing, electrochemistry, batteries as well as thermal and photocatalysis. Herein, we review the recent literature on the synthesis, characterization, simulations, and applications of metal@oxide nanocomposites. In particular, we discuss how the properties of metal@oxide nanoparticles can be tuned for a given application by changing the size of the metal core, the thickness and porosity of the oxide shell, as well as their composition, e.g. by alloying the core or doping the shell. Understanding of structure-property relations in metal@oxide systems provides vast opportunities for the rational design of advanced metal@oxide nanocomposites, making this class of materials promising for a wide range of applications. Graphical abstract","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45119663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-22DOI: 10.1080/23746149.2023.2206049
Sumukh Vaidya, Xingyu Gao, S. Dikshit, I. Aharonovich, Tongcang Li
Color centers in hexagonal boron nitride (hBN) have recently emerged as promising candidates for a new wave of quantum applications. Thanks to hBN's high stability and 2-dimensional (2D) layered structure, color centers in hBN can serve as robust quantum emitters that can be readily integrated into nanophotonic and plasmonic structures on a chip. More importantly, the recently discovered optically addressable spin defects in hBN provide a quantum interface between photons and electron spins for quantum sensing applications. The most well-studied hBN spin defects, the negatively charged boron vacancy ($V_B^-$) spin defects, have been used for quantum sensing of static magnetic fields, magnetic noise, temperature, strain, nuclear spins, paramagnetic spins in liquids, RF signals, and beyond. In particular, hBN nanosheets with spin defects can form van der Waals (vdW) heterostructures with 2D magnetic or other materials for in situ quantum sensing and imaging. This review summarizes the rapidly evolving field of nanoscale and microscale quantum sensing with spin defects in hBN. We introduce basic properties of hBN spin defects, quantum sensing protocols, and recent experimental demonstrations of quantum sensing and imaging with hBN spin defects. We also discuss methods to enhance their sensitivity. Finally, we envision some potential developments and applications of hBN spin defects.
{"title":"Quantum sensing and imaging with spin defects in hexagonal boron nitride","authors":"Sumukh Vaidya, Xingyu Gao, S. Dikshit, I. Aharonovich, Tongcang Li","doi":"10.1080/23746149.2023.2206049","DOIUrl":"https://doi.org/10.1080/23746149.2023.2206049","url":null,"abstract":"Color centers in hexagonal boron nitride (hBN) have recently emerged as promising candidates for a new wave of quantum applications. Thanks to hBN's high stability and 2-dimensional (2D) layered structure, color centers in hBN can serve as robust quantum emitters that can be readily integrated into nanophotonic and plasmonic structures on a chip. More importantly, the recently discovered optically addressable spin defects in hBN provide a quantum interface between photons and electron spins for quantum sensing applications. The most well-studied hBN spin defects, the negatively charged boron vacancy ($V_B^-$) spin defects, have been used for quantum sensing of static magnetic fields, magnetic noise, temperature, strain, nuclear spins, paramagnetic spins in liquids, RF signals, and beyond. In particular, hBN nanosheets with spin defects can form van der Waals (vdW) heterostructures with 2D magnetic or other materials for in situ quantum sensing and imaging. This review summarizes the rapidly evolving field of nanoscale and microscale quantum sensing with spin defects in hBN. We introduce basic properties of hBN spin defects, quantum sensing protocols, and recent experimental demonstrations of quantum sensing and imaging with hBN spin defects. We also discuss methods to enhance their sensitivity. Finally, we envision some potential developments and applications of hBN spin defects.","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46893717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-13DOI: 10.1080/23746149.2023.2176258
L. Genchi, S. Laptenok, C. Liberale
ABSTRACT Stimulated Raman scattering (SRS) microscopy has gained popularity in recent years due to its linearity to molecule concentration and laser intensity, and to the lack of the nonresonant background that affects its analogous technique, coherent anti-Stokes Raman scattering. However, SRS is not a background-free technique. In fact, there are other optical processes – nonlinear transient scattering and nonlinear transient absorption – that can be detrimental to the contrast and sensitivity of SRS microscopy. In this review, we provide a description of these competing optical processes and present an up-to-date description of current solutions to minimize their effect on SRS measurements. Graphical Abstract
{"title":"Background signals in stimulated Raman scattering microscopy and current solutions to avoid them","authors":"L. Genchi, S. Laptenok, C. Liberale","doi":"10.1080/23746149.2023.2176258","DOIUrl":"https://doi.org/10.1080/23746149.2023.2176258","url":null,"abstract":"ABSTRACT Stimulated Raman scattering (SRS) microscopy has gained popularity in recent years due to its linearity to molecule concentration and laser intensity, and to the lack of the nonresonant background that affects its analogous technique, coherent anti-Stokes Raman scattering. However, SRS is not a background-free technique. In fact, there are other optical processes – nonlinear transient scattering and nonlinear transient absorption – that can be detrimental to the contrast and sensitivity of SRS microscopy. In this review, we provide a description of these competing optical processes and present an up-to-date description of current solutions to minimize their effect on SRS measurements. Graphical Abstract","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43871680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-21DOI: 10.1080/23746149.2023.2250105
Sizuo Luo, Robin Weissenbilder, H. Laurell, Mattias Ammitzböll, V'enus Poulain, D. Busto, Lana Neoričić, Chen Guo, S. Zhong, D. Kroon, R. Squibb, R. Feifel, M. Gisselbrecht, A. L’Huillier, C. Arnold
Attosecond photoelectron spectroscopy is often performed with interferometric experimental setups that require outstanding stability. We demonstrate and characterize in detail an actively stabilized, versatile, high spectral resolution attosecond beamline. The active-stabilization system can remain ultra-stable for several hours with an RMS stability of 13 as and a total pump-probe delay scanning range of sim 400 fs. A tunable femtosecond laser source to drive high-order harmonic generation allows for precisely addressing atomic and molecular resonances. Furthermore, the interferometer includes a spectral shaper in 4f-geometry in the probe arm as well as a tunable bandpass filter in the pump arm, which offer additional high flexibility in terms of tunability as well as narrowband or polychromatic probe pulses. We show that spectral phase measurements of photoelectron wavepackets with the rainbow RABBIT technique (reconstruction of attosecond beating by two photon transitions) with narrowband probe pulses can significantly improve the photoelectron energy resolution. In this setup, the temporal-spectral resolution of photoelectron spectroscopy can reach a new level of accuracy and precision.
{"title":"Ultra-stable and versatile high-energy resolution setup for attosecond photoelectron spectroscopy","authors":"Sizuo Luo, Robin Weissenbilder, H. Laurell, Mattias Ammitzböll, V'enus Poulain, D. Busto, Lana Neoričić, Chen Guo, S. Zhong, D. Kroon, R. Squibb, R. Feifel, M. Gisselbrecht, A. L’Huillier, C. Arnold","doi":"10.1080/23746149.2023.2250105","DOIUrl":"https://doi.org/10.1080/23746149.2023.2250105","url":null,"abstract":"Attosecond photoelectron spectroscopy is often performed with interferometric experimental setups that require outstanding stability. We demonstrate and characterize in detail an actively stabilized, versatile, high spectral resolution attosecond beamline. The active-stabilization system can remain ultra-stable for several hours with an RMS stability of 13 as and a total pump-probe delay scanning range of sim 400 fs. A tunable femtosecond laser source to drive high-order harmonic generation allows for precisely addressing atomic and molecular resonances. Furthermore, the interferometer includes a spectral shaper in 4f-geometry in the probe arm as well as a tunable bandpass filter in the pump arm, which offer additional high flexibility in terms of tunability as well as narrowband or polychromatic probe pulses. We show that spectral phase measurements of photoelectron wavepackets with the rainbow RABBIT technique (reconstruction of attosecond beating by two photon transitions) with narrowband probe pulses can significantly improve the photoelectron energy resolution. In this setup, the temporal-spectral resolution of photoelectron spectroscopy can reach a new level of accuracy and precision.","PeriodicalId":7374,"journal":{"name":"Advances in Physics: X","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2023-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43911867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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