Recent progress in the development of direct band gap GeSn is exploited to investigate the optical injection and coherent control of spin currents in this group IV semiconductor. The analysis of these properties could provide essential information for future innovative optical photon-to-spin conversion interfaces, long-sought after for entanglement distribution. A 30-band k•p model is used to evaluate the electronic properties in the material for a relatively wide range of energies, and a linear tetrahedron method is employed for the Brillouin zone integrations. Carrier, spin, current, and spin current injection rates are calculated for a bichromatic field of frequencies ω and 2ω.
{"title":"Optical injection of spin current in direct bandgap GeSn","authors":"Gabriel Fettu, J. Sipe, O. Moutanabbir","doi":"10.1117/12.2594793","DOIUrl":"https://doi.org/10.1117/12.2594793","url":null,"abstract":"Recent progress in the development of direct band gap GeSn is exploited to investigate the optical injection and coherent control of spin currents in this group IV semiconductor. The analysis of these properties could provide essential information for future innovative optical photon-to-spin conversion interfaces, long-sought after for entanglement distribution. A 30-band k•p model is used to evaluate the electronic properties in the material for a relatively wide range of energies, and a linear tetrahedron method is employed for the Brillouin zone integrations. Carrier, spin, current, and spin current injection rates are calculated for a bichromatic field of frequencies ω and 2ω.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125989806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Photonic spin density (PSD) in the near-field gives rise to exotic phenomena such as photonic skyrmions, optical spin-momentum locking and unidirectional topological edge waves. Experimental investigation of these phenomena requires a nanoscale probe that directly interacts with PSD. Here, we propose and demonstrate that the nitrogen-vacancy (NV) center in diamond can be used as a quantum sensor for detecting the spinning nature of photons. This room temperature magnetometer can measure the local polarization of light in ultra-subwavelength volumes through photon-spin-induced virtual transitions. The direct detection of light's spin density at the nanoscale using NV centers in diamond opens a new frontier for studying exotic phases of photons as well as future on-chip applications.
{"title":"Quantum sensing of nanophotonic spin density","authors":"Farid Kalhor, Li‐Ping Yang, L. Bauer, Z. Jacob","doi":"10.1117/12.2596116","DOIUrl":"https://doi.org/10.1117/12.2596116","url":null,"abstract":"Photonic spin density (PSD) in the near-field gives rise to exotic phenomena such as photonic skyrmions, optical spin-momentum locking and unidirectional topological edge waves. Experimental investigation of these phenomena requires a nanoscale probe that directly interacts with PSD. Here, we propose and demonstrate that the nitrogen-vacancy (NV) center in diamond can be used as a quantum sensor for detecting the spinning nature of photons. This room temperature magnetometer can measure the local polarization of light in ultra-subwavelength volumes through photon-spin-induced virtual transitions. The direct detection of light's spin density at the nanoscale using NV centers in diamond opens a new frontier for studying exotic phases of photons as well as future on-chip applications.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128160730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This talk presents recent experimental demonstrations that use integrated nanophotonic processors for various quantum computations such as quantum machine learning and in particular reinforcement learning, where agents interact with environments by exchanging signals via a communication channel. We show that this exchange allows boosting the learning of the agent. Another experiment underlines the feasibility of such photonic integrated processors for a homomorphically-encrypted quantum walk computation. This secure quantum computation exploits path- and polarization as degrees-of-freedom for encrypting the input and output of the photonic processor. As last demonstration I will present counter-intuitive quantum communication tasks that are linked to the Zeno effect. As outlook I will discuss technological challenges for the scale up of photonic quantum computers, and our group’s current work for addressing some of those.
{"title":"Quantum machine learning, secure quantum computing and other applications using integrated quantum photonics","authors":"P. Walther","doi":"10.1117/12.2596862","DOIUrl":"https://doi.org/10.1117/12.2596862","url":null,"abstract":"This talk presents recent experimental demonstrations that use integrated nanophotonic processors for various quantum computations such as quantum machine learning and in particular reinforcement learning, where agents interact with environments by exchanging signals via a communication channel. We show that this exchange allows boosting the learning of the agent. Another experiment underlines the feasibility of such photonic integrated processors for a homomorphically-encrypted quantum walk computation. This secure quantum computation exploits path- and polarization as degrees-of-freedom for encrypting the input and output of the photonic processor. As last demonstration I will present counter-intuitive quantum communication tasks that are linked to the Zeno effect. As outlook I will discuss technological challenges for the scale up of photonic quantum computers, and our group’s current work for addressing some of those.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132325320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Bramati, S. Pierini, M. D’Amato, Mayank Goyal, Q. Glorieux, E. Giacobino, E. Lhuillier, C. Couteau
We present a full analysis of the optical and quantum properties of highly efficient perovskite nanocubes with increased photostability. These emitters exhibit reduced blinking together with a strong photon antibunching. Moreover, we achieved the coupling of a single perovskite nanocube with a tapered optical nanofiber, a step toward a compact integrated single photon source.
{"title":"Room temperature integrated single photon sources based on highly photostable perovskites nanocubes coupled to optical nanofibers","authors":"A. Bramati, S. Pierini, M. D’Amato, Mayank Goyal, Q. Glorieux, E. Giacobino, E. Lhuillier, C. Couteau","doi":"10.1117/12.2593667","DOIUrl":"https://doi.org/10.1117/12.2593667","url":null,"abstract":"We present a full analysis of the optical and quantum properties of highly efficient perovskite nanocubes with increased photostability. \u0000These emitters exhibit reduced blinking together with a strong photon antibunching. Moreover, we achieved the coupling of a single perovskite nanocube with a tapered optical nanofiber, a step toward a compact integrated single photon source.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114726009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Topological insulators (TIs) are a distinctive class of materials, which are insulating in the bulk but support topologically protected conducting surface states. Since their discovery, most work on these materials has focused on their electronic properties, whilst their interaction with electromagnetic fields has largely been untouched. In small topological insulator nanoparticles (TINPs) the dispersion relation of the topological surface states is no longer continuous but discretized. This system forms a type of topological quantum dot. By studying the optical transition properties between the states of the topological quantum dot we explore their use as a lasing system. The optical properties of the particle can be tuned by varying particle size, light frequency, and light polarization, providing a toolbox for quantum optics and quantum information technologies.
{"title":"Topological quantum dots: a novel platform for THz lasing quantum optics","authors":"V. Giannini","doi":"10.1117/12.2595710","DOIUrl":"https://doi.org/10.1117/12.2595710","url":null,"abstract":"Topological insulators (TIs) are a distinctive class of materials, which are insulating in the bulk but support topologically protected conducting surface states. Since their discovery, most work on these materials has focused on their electronic properties, whilst their interaction with electromagnetic fields has largely been untouched. In small topological insulator nanoparticles (TINPs) the dispersion relation of the topological surface states is no longer continuous but discretized. This system forms a type of topological quantum dot. \u0000 \u0000By studying the optical transition properties between the states of the topological quantum dot we explore their use as a lasing system. The optical properties of the particle can be tuned by varying particle size, light frequency, and light polarization, providing a toolbox for quantum optics and quantum information technologies.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116499697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Epsilon-near-zero (ENZ) materials also defined as near zero permittivity materials have attracted much attention for their peculiar physical features. In this work, we study analytically and numerically the emission decay rate of a hybrid system combining a vertical dipolar emitter in the presence of ENZ spherical Nano-particle. We examine the asymptotic behavior of the fluorescence decay rate in the near field of the ENZ spherical nanoparticle. We demonstrate the competition between the radiative and non-radiative channels. Our results show that a fundamental understanding of multiple contributions is critical to control the fluorescence decay rate in its molecular environment.
{"title":"Minimization of LDOS near ENZ nanoparticles: competition between radiative and non-radiative processes","authors":"Hawraa Atwi, R. Nicolas, Z. Herro, R. Vincent","doi":"10.1117/12.2593909","DOIUrl":"https://doi.org/10.1117/12.2593909","url":null,"abstract":"Epsilon-near-zero (ENZ) materials also defined as near zero permittivity materials have attracted much attention for their peculiar physical features. In this work, we study analytically and numerically the emission decay rate of a hybrid system combining a vertical dipolar emitter in the presence of ENZ spherical Nano-particle. We examine the asymptotic behavior of the fluorescence decay rate in the near field of the ENZ spherical nanoparticle. We demonstrate the competition between the radiative and non-radiative channels. Our results show that a fundamental understanding of multiple contributions is critical to control the fluorescence decay rate in its molecular environment.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125873489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Milos Petrovic, Lijiong Shen, Shuyu Dong, Filippo Martinelli, H. Krishnamoorthy, C. Kurtsiefer, C. Soci
We report a single photon detector based on NbTiN microbridges, suitable for operation within telecommunication wavelengths. We observed an excellent signal-to-noise ratio of the readout signal while the corresponding jitter contributed by electrical noise was measured to be less than 10 ps. Routing the current through a parallel electrical connection to set the microbridge back to the superconducting state after photon absorption enabled us to overcome the hysteresis of the state transition. Our approach combines facile fabrication of fast microscale detectors with efficient current redistribution mechanism, enabling prospective applications in quantum photonics which requires accurate estimation of photon arrival events.
{"title":"Superconducting microbridge single photon detectors with improved temporal response","authors":"Milos Petrovic, Lijiong Shen, Shuyu Dong, Filippo Martinelli, H. Krishnamoorthy, C. Kurtsiefer, C. Soci","doi":"10.1117/12.2598654","DOIUrl":"https://doi.org/10.1117/12.2598654","url":null,"abstract":"We report a single photon detector based on NbTiN microbridges, suitable for operation within telecommunication wavelengths. We observed an excellent signal-to-noise ratio of the readout signal while the corresponding jitter contributed by electrical noise was measured to be less than 10 ps. Routing the current through a parallel electrical connection to set the microbridge back to the superconducting state after photon absorption enabled us to overcome the hysteresis of the state transition. Our approach combines facile fabrication of fast microscale detectors with efficient current redistribution mechanism, enabling prospective applications in quantum photonics which requires accurate estimation of photon arrival events.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130251028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Galland, S. T. Velez, V. Sudhir, A. Pogrebna, N. Sangouard
In this talk we show how time-resolved Raman spectroscopy can be combined with Time Correlated Single Photon Counting (TCSPC) to create and evidence entanglement between light and a collective molecular vibration (i.e. an optical phonon) [3]. We further show that the correlations are strong enough to violate the Bell Inequality, which provides the most stringent test for entanglement. We measure the decay of these hybrid photon-phonon Bell correlations with sub-picosecond time-resolution and find that they survive over several hundred oscillations at ambient conditions.
{"title":"Bell correlations between light and vibrations in diamond at ambient conditions","authors":"C. Galland, S. T. Velez, V. Sudhir, A. Pogrebna, N. Sangouard","doi":"10.1117/12.2594132","DOIUrl":"https://doi.org/10.1117/12.2594132","url":null,"abstract":"In this talk we show how time-resolved Raman spectroscopy can be combined with Time Correlated Single Photon Counting (TCSPC) to create and evidence entanglement between light and a collective molecular vibration (i.e. an optical phonon) [3]. We further show that the correlations are strong enough to violate the Bell Inequality, which provides the most stringent test for entanglement. We measure the decay of these hybrid photon-phonon Bell correlations with sub-picosecond time-resolution and find that they survive over several hundred oscillations at ambient conditions.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127528354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Olivier, C. Sciancalepore, H. E. Dirani, Q. Wilmart, Raouia Rhazi, E. Monroy, J. Gerard, D. Bacco, F. Sabattoli, M. Galli, D. Bajoni, J. Rothman
Silicon photonics based on CMOS technology is a very attractive platform to build compact, low-cost and scalable quantum photonics integrated circuits addressing the requirements of quantum key distribution protocols. We show record low propagation losses below 0.5 dB/cm and below 0.05 dB/cm for silicon and silicon nitride waveguides respectively. We will present our results on integrated components such as hybrid III-V on silicon lasers for weak coherent pulse generation, high-quality microresonators for entangled photon pair generation and we will show our recent developments on high crystalline quality NbN thin films with improved critical temperature for waveguide-integrated superconducting single photon detectors.
{"title":"Building an integrated quantum photonics platform on silicon for ultra-secure communications","authors":"S. Olivier, C. Sciancalepore, H. E. Dirani, Q. Wilmart, Raouia Rhazi, E. Monroy, J. Gerard, D. Bacco, F. Sabattoli, M. Galli, D. Bajoni, J. Rothman","doi":"10.1117/12.2594711","DOIUrl":"https://doi.org/10.1117/12.2594711","url":null,"abstract":"Silicon photonics based on CMOS technology is a very attractive platform to build compact, low-cost and scalable quantum photonics integrated circuits addressing the requirements of quantum key distribution protocols. We show record low propagation losses below 0.5 dB/cm and below 0.05 dB/cm for silicon and silicon nitride waveguides respectively. We will present our results on integrated components such as hybrid III-V on silicon lasers for weak coherent pulse generation, high-quality microresonators for entangled photon pair generation and we will show our recent developments on high crystalline quality NbN thin films with improved critical temperature for waveguide-integrated superconducting single photon detectors.","PeriodicalId":189647,"journal":{"name":"Quantum Nanophotonic Materials, Devices, and Systems 2021","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127092174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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