Pub Date : 2023-11-27DOI: 10.1016/j.photonics.2023.101215
Vladimir D. Burtsev , Tatyana S. Vosheva , Sergey Y. Prokhorov , Anton A. Khudykin , Dmitry S. Filonov
A simulated and manufactured broadband antenna array of 2×2 meta-elements operating in the range of 2.5–4.5 GHz is presented. The characteristic size of the aperture of this sample is two wavelengths, but its realized gain exceeds 11.3 dBi in the entire range and reaches a peak of 14.3 dBi at the frequency of 3.2 GHz. Such results become possible by the successful combining electric and magnetic multipoles of the meta-elements, slightly spaced in frequency. As a trade off in accuracy and manufactring costs we use additive manufacturing: 3D printing of meta-elements on a photopolymer printer and subsequent metallization of their surface were involved in the manufacture of the antenna array.
{"title":"Broadband antenna array realization with printed meta-elements and its multipoles spectra","authors":"Vladimir D. Burtsev , Tatyana S. Vosheva , Sergey Y. Prokhorov , Anton A. Khudykin , Dmitry S. Filonov","doi":"10.1016/j.photonics.2023.101215","DOIUrl":"10.1016/j.photonics.2023.101215","url":null,"abstract":"<div><p>A simulated and manufactured broadband antenna array<span><span><span> of 2×2 meta-elements operating in the range of 2.5–4.5 GHz is presented. The characteristic size of the aperture of this sample is two wavelengths, but its realized gain exceeds 11.3 dBi in the entire range and reaches a peak of 14.3 dBi at the frequency of 3.2 GHz. Such results become possible by the successful combining electric and magnetic multipoles of the meta-elements, slightly spaced in frequency. As a trade off in accuracy and manufactring costs we use </span>additive manufacturing: 3D printing of meta-elements on a </span>photopolymer printer and subsequent metallization of their surface were involved in the manufacture of the antenna array.</span></p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101215"},"PeriodicalIF":2.7,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138542166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-24DOI: 10.1016/j.photonics.2023.101212
Xiang-yang Liu , Cheng-ping Huang
Electric LC resonances, occurring in metallic circuits, govern the motion of free electrons or electric signals. In this paper, optical LC-like resonances in high-index particles (HIPs) or dielectric LC resonances have been studied, which involve bounded electrons and optical fields instead. The resonance effect is dominated by optical analogues of inductance and capacitance, which can be determined according to the electromagnetic energy bounded near the particle. The viewpoint of dielectric optical circuit with equivalent parameters facilitates the understanding of dielectric resonance effect. The result also provides a method for studying the optical properties of the HIPs.
{"title":"Optical LC-like resonances in high-index particles","authors":"Xiang-yang Liu , Cheng-ping Huang","doi":"10.1016/j.photonics.2023.101212","DOIUrl":"10.1016/j.photonics.2023.101212","url":null,"abstract":"<div><p><span>Electric LC resonances, occurring in metallic circuits, govern the motion of free electrons or electric signals. In this paper, optical LC-like resonances in high-index particles (HIPs) or </span>dielectric<span><span> LC resonances have been studied, which involve bounded electrons and optical fields instead. The resonance effect is dominated by optical analogues of inductance and capacitance, which can be determined according to the electromagnetic energy bounded near the particle. The viewpoint of dielectric optical circuit with equivalent parameters facilitates the understanding of dielectric resonance effect. The result also provides a method for studying the </span>optical properties of the HIPs.</span></p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101212"},"PeriodicalIF":2.7,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-24DOI: 10.1016/j.photonics.2023.101216
Anton V. Nikulin , Aleksey N. Kosmynin , Vladimir D. Burtsev , Sergey Y. Prokhorov , Tatyana S. Vosheva , Dmitry S. Filonov
Satellite communication systems for mounting on vehicles are commonly based on phased array antennas with electronical beam steering. In this work we develop active metasurface-based receive-transmit antenna arrays for newly deployed satellite constellation system running in Ku-band. Both receive and transmit subarrays are based on patch-antenna elements driven in circular polarization using 90∘ hybrids. In both subarrays we optimized elements sizes and array period to have optimal ellipticity, gain, side lobe level. In electromagnetic simulations we achieved realized gain of 32.2 dBi for the Rx subarray and 33.4 dBi for the Tx subarray obtained in a broad scanning angle range from − 15∘ to + 45∘.
{"title":"Towards phased array antenna operating in Ku-band for satellite communications","authors":"Anton V. Nikulin , Aleksey N. Kosmynin , Vladimir D. Burtsev , Sergey Y. Prokhorov , Tatyana S. Vosheva , Dmitry S. Filonov","doi":"10.1016/j.photonics.2023.101216","DOIUrl":"10.1016/j.photonics.2023.101216","url":null,"abstract":"<div><p><span>Satellite communication systems for mounting on vehicles are commonly based on phased array antennas<span><span> with electronical beam steering. In this work we develop active metasurface-based receive-transmit antenna arrays for newly deployed </span>satellite constellation system running in Ku-band. Both receive and transmit subarrays are based on patch-antenna elements driven in circular polarization using 90</span></span><sup>∘</sup> hybrids. In both subarrays we optimized elements sizes and array period to have optimal ellipticity, gain, side lobe level. In electromagnetic simulations we achieved realized gain of 32.2 dBi for the Rx subarray and 33.4 dBi for the Tx subarray obtained in a broad scanning angle range from − 15<sup>∘</sup> to + 45<sup>∘</sup>.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101216"},"PeriodicalIF":2.7,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Transmission of microwaves through a composite plate containing Fe nanoparticles in an epoxyamine matrix, as well as reflection of waves from it, has been investigated. The experiments were performed at the frequencies from 26 to 38 GHz in the magnetic fields up to 12 kOe. The ferromagnetic resonance line in the composites with the weight fraction of Fe particles from 10% to 30% has been studied. The magnetic field dependence of the microwave power dissipation has been plotted. Field dependence of the transmission and reflection coefficients have been calculated, as well as qualitative, and in some cases quantitative, agreement has been obtained. The penetration depth of microwaves into the composites has been analyzed. Spectrum of the FMR has been constructed. Results of interaction of microwaves with Fe nanoparticles are discussed taking into account magnetic properties and composite structure.
{"title":"Interaction of microwaves with nanocomposites containing Fe particles","authors":"D.V. Perov , E.A. Kuznetsov , A.B. Rinkevich , O.V. Nemytova , M.A. Uimin","doi":"10.1016/j.photonics.2023.101214","DOIUrl":"https://doi.org/10.1016/j.photonics.2023.101214","url":null,"abstract":"<div><p><span>Transmission of microwaves through a composite plate containing Fe </span>nanoparticles<span><span> in an epoxyamine matrix, as well as reflection of waves from it, has been investigated. The experiments were performed at the frequencies from 26 to 38 GHz in the magnetic fields up to 12 kOe. The ferromagnetic resonance line in the composites with the weight fraction of Fe particles from 10% to 30% has been studied. The magnetic field dependence of the microwave power dissipation has been plotted. Field dependence of the transmission and reflection coefficients have been calculated, as well as qualitative, and in some cases quantitative, agreement has been obtained. The penetration depth of microwaves into the composites has been analyzed. Spectrum of the FMR has been constructed. Results of interaction of microwaves with Fe nanoparticles are discussed taking into account </span>magnetic properties and composite structure.</span></p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101214"},"PeriodicalIF":2.7,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138484348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-23DOI: 10.1016/j.photonics.2023.101210
Mayank A. Ardeshana , Falgunkumar N. Thakkar , Sunayana G. Domadia
The recent emergence of electromagnetic (EM) metamaterial absorbers (MAs) with exceptionally high absorption rates has captured the interest of numerous researchers. This study introduces an innovative design for a dual-band microwave absorber, inspired by metamaterial concepts. A square ring resonator, a second ring resonator with splits at each of its four corners, and a third ring resonator created by joining two I-shaped pieces make up the unit cell, which has the dimensions . These resonators are realized on a metal-backed FR-4 substrate, a common dielectric material found in printed circuit boards. The primary objective of this absorber's configuration is to achieve remarkable absorption peaks at 1.55 GHz and 3.3 GHz, attaining absorption levels of 99.73% and 99.41%, respectively. Notably, the design is insensitive to polarization and exhibits a broad incidence angle of up to 60°. It maintains high absorption rates of 95% for the transverse electric mode and 94% for the transverse magnetic mode. In order to optimize the suggested design, parametric studies were carried out for unit cell design by varying the split gap, loss tangent, and various types of metal. The advanced design system (ADS) software was used to assess an equivalent circuit, and the results of the CST simulation were compared with the circuit, confirming good agreement. These attributes are well-suited for efficiently absorbing signals within specific frequency ranges, catering to the demands of applications such as Global Navigation Satellite Systems (GNSS) and the pioneering 5G frequency band. Simulation and measured results of the absorber closely align with the expected performance, affirming the efficacy of the design. In essence, this solution provides an effective means of absorbing electromagnetic waves in these defined frequency ranges, rendering it highly suitable for diverse wireless communication and navigation systems.
{"title":"Metamaterial-inspired absorber for GNSS and 5G pioneer spectrum band: Achieving narrow bandwidth, wide incidence angle, and polarization agnostic","authors":"Mayank A. Ardeshana , Falgunkumar N. Thakkar , Sunayana G. Domadia","doi":"10.1016/j.photonics.2023.101210","DOIUrl":"https://doi.org/10.1016/j.photonics.2023.101210","url":null,"abstract":"<div><p><span>The recent emergence of electromagnetic (EM) metamaterial<span> absorbers (MAs) with exceptionally high absorption rates has captured the interest of numerous researchers. This study introduces an innovative design for a dual-band microwave absorber, inspired by metamaterial concepts. A square ring resonator, a second ring resonator with splits at each of its four corners, and a third ring resonator created by joining two I-shaped pieces make up the unit cell, which has the dimensions </span></span><span><math><mrow><mn>25.5</mn><mo>×</mo><mn>25.5</mn><mo>×</mo><mn>2.54</mn><msup><mrow><mi>mm</mi></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span><span><span>. These resonators are realized on a metal-backed FR-4 substrate, a common dielectric material<span> found in printed circuit boards. The primary objective of this absorber's configuration is to achieve remarkable absorption peaks at 1.55 GHz and 3.3 GHz, attaining absorption levels of 99.73% and 99.41%, respectively. Notably, the design is insensitive to polarization and exhibits a broad incidence angle of up to 60°. It maintains high absorption rates of 95% for the transverse electric mode and 94% for the transverse magnetic mode. In order to optimize the suggested design, parametric studies were carried out for unit cell design by varying the split gap, loss tangent, and various types of metal. The advanced design system (ADS) software was used to assess an equivalent circuit, and the results of the CST simulation were compared with the circuit, confirming good agreement. These attributes are well-suited for efficiently absorbing signals within specific frequency ranges, catering to the demands of applications such as Global Navigation Satellite Systems (GNSS) and the pioneering 5G frequency band. Simulation and measured results of the absorber closely align with the expected performance, affirming the efficacy of the design. In essence, this solution provides an effective means of absorbing </span></span>electromagnetic waves<span> in these defined frequency ranges, rendering it highly suitable for diverse wireless communication and navigation systems.</span></span></p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101210"},"PeriodicalIF":2.7,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138490937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
A broadband absorber with multiple coupled diagonally sliced square rings at terahertz frequency using vanadium dioxide is proposed. The proposed structure exhibits more than 90 % absorption in the frequency range of 2.85–7.51 THz, with a relative bandwidth of 89.96 % and an absorption bandwidth of 4.66 THz. The absorptivity curve increases as vanadium dioxide conductivity rises from 200 S/m to 200,000 S/m, giving a wide range of tunability from 1.62 % to 100 % at 3.4 THz. Due to its geometrical symmetry, the proposed structure is independent of the polarization angle under normal incident plane waves. The proposed structure works for different incident angles for transverse electric (TE) mode and transverse magnetic (TM) mode with oblique incidence plane waves. The results demonstrate the broad bandwidth compared to the state-of-the-art designs within the same frequency band with potential applications in sensors, switches, tuning, and modulation in the terahertz range.
{"title":"Adjustable broadband absorber based on vanadium dioxide multiple coupled diagonally sliced square ring shaped structure for THz frequency","authors":"Pankaj Binda , Sagnik Banerjee , Rajendra Mitharwal , Sarita Nanda","doi":"10.1016/j.photonics.2023.101211","DOIUrl":"https://doi.org/10.1016/j.photonics.2023.101211","url":null,"abstract":"<div><p>A broadband absorber with multiple coupled diagonally sliced square rings at terahertz frequency using vanadium dioxide is proposed. The proposed structure exhibits more than 90 % absorption in the frequency range of 2.85–7.51 THz, with a relative bandwidth of 89.96 % and an absorption bandwidth of 4.66 THz. The absorptivity curve increases as vanadium dioxide conductivity rises from 200 S/m to 200,000 S/m, giving a wide range of tunability from 1.62 % to 100 % at 3.4 THz. Due to its geometrical symmetry, the proposed structure is independent of the polarization angle under normal incident plane waves. The proposed structure works for different incident angles for transverse electric (TE) mode and transverse magnetic (TM) mode with oblique incidence plane waves. The results demonstrate the broad bandwidth compared to the state-of-the-art designs within the same frequency band with potential applications in sensors, switches, tuning, and modulation in the terahertz range.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101211"},"PeriodicalIF":2.7,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138480296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-19DOI: 10.1016/j.photonics.2023.101206
Semyon V. Bachinin , Anastasia Lubimova , Svyatoslav A. Povarov , Dmitrii Zubok , Elizaveta Okoneshnikova , Alena N. Kulakova , Sergey S. Rzhevskiy , Valentin A. Milichko
Metal–organic frameworks (MOFs) have recently emerged as a new class of scalable and low energy consumptive materials for microelectronic applications. Here, we experimentally extend the list of MOFs with memristive behavior for electronic data storage. Using 15 µm single crystals of UiO-66 located in 10 µm gap between Au contacts, we demonstrate an electronic set/reset process upon 15 kV cm−1 of an electric field strength under normal conditions. Such low-energy data recording together with an endurance of more than 7 cycles for set/reset opens up prospects for the design of MOF-based electronic and opto-electronic devices.
{"title":"Memristive behavior of UiO-66 metal-organic framework single crystal","authors":"Semyon V. Bachinin , Anastasia Lubimova , Svyatoslav A. Povarov , Dmitrii Zubok , Elizaveta Okoneshnikova , Alena N. Kulakova , Sergey S. Rzhevskiy , Valentin A. Milichko","doi":"10.1016/j.photonics.2023.101206","DOIUrl":"10.1016/j.photonics.2023.101206","url":null,"abstract":"<div><p><span>Metal–organic frameworks (MOFs) have recently emerged as a new class of scalable and low energy consumptive materials for microelectronic applications. Here, we experimentally extend the list of MOFs with memristive behavior for electronic data storage. Using 15 µm single crystals of UiO-66 located in 10 µm gap between Au contacts, we demonstrate an electronic set/reset process upon 15 kV cm</span><sup>−1</sup><span> of an electric field strength under normal conditions. Such low-energy data recording together with an endurance of more than 7 cycles for set/reset opens up prospects for the design of MOF-based electronic and opto-electronic devices.</span></p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101206"},"PeriodicalIF":2.7,"publicationDate":"2023-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-17DOI: 10.1016/j.photonics.2023.101199
Vaswati Biswas , R. Vijaya
Subwavelength-thick modulation of surface profile of a dielectric layer combined with a nanometer-thick metallic coating on it can be used for highly sensitive refractive index sensing using the concept of surface plasmon resonance. The performance efficiency of a 1D sinusoidal plasmonic grating of higher periodicity made of polymethylmethacrylate with gold coating on it is evaluated for monitoring water quality. The sinusoidal structure is fabricated by the cost-effective soft imprint lithography technique using a commercially available compact disk as master. Even though the master has a step profile, the solution-based technique aids in achieving the sinusoidal profile. The higher periodicity aids in attaining a higher sensitivity of 1533 nm/RIU at normal incidence and also provides a broad wavelength detection regime that can be controlled by the incidence angle. As the sinusoidal grating supports only the fundamental mode of the surface plasmon, it allows for more precise detection of any analyte. The optimized parameters for the structure are obtained through finite element method calculation.
{"title":"Large-period plasmonic grating with sinusoidal profile for monitoring water quality with high sensitivity","authors":"Vaswati Biswas , R. Vijaya","doi":"10.1016/j.photonics.2023.101199","DOIUrl":"10.1016/j.photonics.2023.101199","url":null,"abstract":"<div><p><span><span>Subwavelength-thick modulation of surface profile of a dielectric<span> layer combined with a nanometer-thick metallic coating on it can be used for highly sensitive refractive index sensing using the concept of </span></span>surface plasmon resonance. The performance efficiency of a 1D sinusoidal plasmonic grating of higher periodicity made of polymethylmethacrylate with gold coating on it is evaluated for monitoring water quality. The sinusoidal structure is fabricated by the cost-effective soft imprint lithography technique using a commercially available compact disk as master. Even though the master has a step profile, the solution-based technique aids in achieving the sinusoidal profile. The higher periodicity aids in attaining a higher sensitivity of 1533 nm/RIU at normal incidence and also provides a broad wavelength detection regime that can be controlled by the incidence angle. As the sinusoidal grating supports only the fundamental mode of the surface plasmon, it allows for more precise detection of any analyte. The optimized parameters for the structure are obtained through </span>finite element method calculation.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"58 ","pages":"Article 101199"},"PeriodicalIF":2.7,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138530145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-07DOI: 10.1016/j.photonics.2023.101198
Nikolaj Zhestkij , Svyatoslav Povarov , Yuri A. Mezenov , Sergey S. Rzhevskiy , Alena N. Kulakova , Valentin A. Milichko
We report on the experimental study the non-linear optical properties of UiO-66 metal-organic framework with high thermal and chemical stability. We demonstrate the coherent conversion of high-intensity incoming radiation into the third harmonics ranging from 450 to 600 nm. Moreover, eclipse z - scan of single UiO-66 microcrystals made it possible to determine the saturable absorption coefficient (βeff = −1.415·10-2 cm/GW at 515 nm and −3.865·10-1 cm/GW at 1030 nm), thereby, bringing UiO-66 to the list of nonlinear and stable MOFs for real-life photonic applications.
{"title":"UiO-66 metal organic framework as stable platform for non-linear optical applications","authors":"Nikolaj Zhestkij , Svyatoslav Povarov , Yuri A. Mezenov , Sergey S. Rzhevskiy , Alena N. Kulakova , Valentin A. Milichko","doi":"10.1016/j.photonics.2023.101198","DOIUrl":"https://doi.org/10.1016/j.photonics.2023.101198","url":null,"abstract":"<div><p>We report on the experimental study the non-linear optical properties of UiO-66 metal-organic framework with high thermal and chemical stability. We demonstrate the coherent conversion of high-intensity incoming radiation into the third harmonics ranging from 450 to 600 nm. Moreover, eclipse z - scan of single UiO-66 microcrystals made it possible to determine the saturable absorption coefficient (β<sub>eff</sub> = −1.415·10<sup>-2</sup> cm/GW at 515 nm and −3.865·10<sup>-1</sup> cm/GW at 1030 nm), thereby, bringing UiO-66 to the list of nonlinear and stable MOFs for real-life photonic applications.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"57 ","pages":"Article 101198"},"PeriodicalIF":2.7,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92135761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 : 2023-11-04DOI: 10.1016/j.photonics.2023.101197
Mengting Ma , Xuejun Lian , Jinping Tian , Rongcao Yang
Based on the phase transition properties of vanadium dioxide (VO2), a metamaterial device is designed in this paper, which can achieve multiple switchable functions. When VO2 is in the metallic state, the proposed device can realize broadband absorption with peak absorbance more than 90 % in the frequency range of 2.40–6.73 THz and broadband linear polarization conversion (LPC) with polarization conversion ratio (PCR) greater than 90% in the range of 1.80–4.21 THz, respectively, depending on whether the incidence of terahertz (THz) electromagnetic (EM) wave is from top side or bottom side. When VO2 is in the insulated state, the proposed device can achieve LPC of half-reflection and half-transmission (HRHT) and transmissive linear-to-circular (LTC) polarization conversion. The study in this paper has guiding significance in the design of THz metamaterial devices with multiple functions.
{"title":"A dynamically switchable metamaterial device with multiple functions based on vanadium dioxide","authors":"Mengting Ma , Xuejun Lian , Jinping Tian , Rongcao Yang","doi":"10.1016/j.photonics.2023.101197","DOIUrl":"https://doi.org/10.1016/j.photonics.2023.101197","url":null,"abstract":"<div><p>Based on the phase transition properties of vanadium dioxide (VO<sub>2</sub>), a metamaterial device is designed in this paper, which can achieve multiple switchable functions. When VO<sub>2</sub> is in the metallic state, the proposed device can realize broadband absorption with peak absorbance more than 90 % in the frequency range of 2.40–6.73 THz and broadband linear polarization conversion (LPC) with polarization conversion ratio (PCR) greater than 90% in the range of 1.80–4.21 THz, respectively, depending on whether the incidence of terahertz (THz) electromagnetic (EM) wave is from top side or bottom side. When VO<sub>2</sub> is in the insulated state, the proposed device can achieve LPC of half-reflection and half-transmission (HRHT) and transmissive linear-to-circular (LTC) polarization conversion. The study in this paper has guiding significance in the design of THz metamaterial devices with multiple functions.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"57 ","pages":"Article 101197"},"PeriodicalIF":2.7,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72249559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}