Beñat Martinez de Aguirre Jokisch, Rasmus Christiansen, Ole Sigmund
Thermo-optical phase shifters (TOPSs) have emerged as an important building block in silicon photonics platforms due to their ability to dynamically control the optical phase of light. To enable wide-scale adoption in practical applications, it is paramount that TOPSs are optimized for low power consumption, low optical loss, small footprint, small thermal time constant, and easy fabrication, among other ideal characteristics. In the last decades, multiple designs have emerged from intuition and trial-and-error-based processes to match these objectives. In this work, we propose a topology optimization-based multiphysics inverse design framework for designing cross-sectionally compact low-optical-loss TOPS devices that can accommodate fabrication constraints. Results demonstrate the capability of tailoring novel designs with losses up to 33% lower than previously proposed designs.
{"title":"Topology Optimization of Efficient and Compact Thermo-Optical Phase Shifters","authors":"Beñat Martinez de Aguirre Jokisch, Rasmus Christiansen, Ole Sigmund","doi":"10.1364/josab.499979","DOIUrl":"https://doi.org/10.1364/josab.499979","url":null,"abstract":"Thermo-optical phase shifters (TOPSs) have emerged as an important building block in silicon photonics platforms due to their ability to dynamically control the optical phase of light. To enable wide-scale adoption in practical applications, it is paramount that TOPSs are optimized for low power consumption, low optical loss, small footprint, small thermal time constant, and easy fabrication, among other ideal characteristics. In the last decades, multiple designs have emerged from intuition and trial-and-error-based processes to match these objectives. In this work, we propose a topology optimization-based multiphysics inverse design framework for designing cross-sectionally compact low-optical-loss TOPS devices that can accommodate fabrication constraints. Results demonstrate the capability of tailoring novel designs with losses up to 33% lower than previously proposed designs.","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135775292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Yunping Qi, Shu Zhang, Qiang Shi, Mingrui Su, SHIYU ZHAO, Zhou zihao, xiang xian wang
A voltage-tunable hybrid multichannel bandstop filter utilizing a metal-insulator-metal (MIM) waveguide is presented in this work. The unique aspect of this filter is its ability to achieve three narrowband and one broadband filtering functions simultaneously. The filter design comprises two asymmetric composite cavities filled with an organic electro-optical material called 4-dimethylamino-N-methyl-4-toluenesulfonate (DAST). These composite cavities consist of a rectangular cavity combined with an annular cavity. The annular cavity is formed by connecting two rectangular cavities with two semi-elliptical annular cavities. Using the finite element method (FEM), we thoroughly study and analyze the transmission spectrum and magnetic field distribution of the filter. We also delve into the impact of various structural parameters on the transmission spectrum. Our analysis demonstrates that the bandstop filter achieves a remarkable minimum transmittance of 0.02%, 0.29%, and 0.1%, alongside minimum bandwidths of 5 nm, 9 nm, and 25 nm in three narrowband modes, respectively. These modes attain maximum quality factors ( Q ) of 123.7, 87.1, and 44.2. In the broadband mode, the stopband bandwidth covers 70 nm, and the adjustable range spans from 1695 nm to 2065 nm. The filter's characteristics can be dynamically adjusted by applying a control voltage, introducing a remarkable level of tunability while maintaining stable filter performance. To enhance its performance, we optimize the basic structure, yielding a broadened bandwidth of 238 nm for the broadband mode. This extended bandwidth comes with exceptional electrical tuning characteristics intact. Our proposed voltage-tunable hybrid multichannel bandstop filter presents a versatile solution with significant potential applications in high-density integrated circuits and nano-optics
{"title":"Hybrid multi-channel electrically tunable bandstop filter based on DAST electro-optical material","authors":"Yunping Qi, Shu Zhang, Qiang Shi, Mingrui Su, SHIYU ZHAO, Zhou zihao, xiang xian wang","doi":"10.1364/josab.506177","DOIUrl":"https://doi.org/10.1364/josab.506177","url":null,"abstract":"A voltage-tunable hybrid multichannel bandstop filter utilizing a metal-insulator-metal (MIM) waveguide is presented in this work. The unique aspect of this filter is its ability to achieve three narrowband and one broadband filtering functions simultaneously. The filter design comprises two asymmetric composite cavities filled with an organic electro-optical material called 4-dimethylamino-N-methyl-4-toluenesulfonate (DAST). These composite cavities consist of a rectangular cavity combined with an annular cavity. The annular cavity is formed by connecting two rectangular cavities with two semi-elliptical annular cavities. Using the finite element method (FEM), we thoroughly study and analyze the transmission spectrum and magnetic field distribution of the filter. We also delve into the impact of various structural parameters on the transmission spectrum. Our analysis demonstrates that the bandstop filter achieves a remarkable minimum transmittance of 0.02%, 0.29%, and 0.1%, alongside minimum bandwidths of 5 nm, 9 nm, and 25 nm in three narrowband modes, respectively. These modes attain maximum quality factors ( Q ) of 123.7, 87.1, and 44.2. In the broadband mode, the stopband bandwidth covers 70 nm, and the adjustable range spans from 1695 nm to 2065 nm. The filter's characteristics can be dynamically adjusted by applying a control voltage, introducing a remarkable level of tunability while maintaining stable filter performance. To enhance its performance, we optimize the basic structure, yielding a broadened bandwidth of 238 nm for the broadband mode. This extended bandwidth comes with exceptional electrical tuning characteristics intact. Our proposed voltage-tunable hybrid multichannel bandstop filter presents a versatile solution with significant potential applications in high-density integrated circuits and nano-optics","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135818733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Chenxia Li, Jie Jiang, Bo Fang, Zhi Hong, Xufeng Jing
Coded metasurfaces build a bridge between the physical world and digital worlds, making it possible to manipulate electromagnetic waves and implement programmable metamaterials through digitally coded sequences. This “digital metasurface” based on binary digital logic greatly simplifies the design process of the metasurface and improves the flexibility of regulating electromagnetic waves. Based on the principle of Fourier convolution addition, a physical superposition cascaded metasurface is designed. The metasurface unit consists of three dielectric substrates and four “H”-shaped copper metal patch boards. The addition of most coding metasurfaces is to add two basic coding metasurfaces through the addition rules between digital codes to obtain a new coding sequence, and the new coding sequence has the characteristics of the previous two coding sequences. We propose a physically superimposed cascaded encoding metasurface. By physically superposing two different sequences of metasurfaces, the cascaded metasurface formed after superposition also has the characteristics of the first two basic coding sequences. We experimentally verified the proposed idea using two different dielectric materials, and there was good consistency between the experiment and simulation, thereby verifying the consistency of the metasurface cascade and the phase-encoding element surface addition principle. This design approach has potential applications in multifunctional photonic devices.
{"title":"Direction Control of Electromagnetic Beam Scattering by Physically Stacked Cascaded Coding Metasurfaces","authors":"Chenxia Li, Jie Jiang, Bo Fang, Zhi Hong, Xufeng Jing","doi":"10.1364/josab.501052","DOIUrl":"https://doi.org/10.1364/josab.501052","url":null,"abstract":"Coded metasurfaces build a bridge between the physical world and digital worlds, making it possible to manipulate electromagnetic waves and implement programmable metamaterials through digitally coded sequences. This “digital metasurface” based on binary digital logic greatly simplifies the design process of the metasurface and improves the flexibility of regulating electromagnetic waves. Based on the principle of Fourier convolution addition, a physical superposition cascaded metasurface is designed. The metasurface unit consists of three dielectric substrates and four “H”-shaped copper metal patch boards. The addition of most coding metasurfaces is to add two basic coding metasurfaces through the addition rules between digital codes to obtain a new coding sequence, and the new coding sequence has the characteristics of the previous two coding sequences. We propose a physically superimposed cascaded encoding metasurface. By physically superposing two different sequences of metasurfaces, the cascaded metasurface formed after superposition also has the characteristics of the first two basic coding sequences. We experimentally verified the proposed idea using two different dielectric materials, and there was good consistency between the experiment and simulation, thereby verifying the consistency of the metasurface cascade and the phase-encoding element surface addition principle. This design approach has potential applications in multifunctional photonic devices.","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135775293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Alexander Akulshin, Felipe Pedreros Bustos, Nafia Rahaman, Dmitry Budker
{"title":"Vortex light - based identification of directional emission from sodium atoms","authors":"Alexander Akulshin, Felipe Pedreros Bustos, Nafia Rahaman, Dmitry Budker","doi":"10.1364/josab.499977","DOIUrl":"https://doi.org/10.1364/josab.499977","url":null,"abstract":"","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135270979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Low-temperature multi-channel bandstop filters with ultra-wide stopbands in Fibonacci superconducting photonic crystals","authors":"Yongjun Xiao, Dong Zhao, Liu Fanghua, Ni Hao","doi":"10.1364/josab.505290","DOIUrl":"https://doi.org/10.1364/josab.505290","url":null,"abstract":"","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135270847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"CTDNet: Cartoon-Texture Decomposition-based Gray Image Super-Resolution Network with Multiple Degradations","authors":"Baoshun Shi, WENYUAN XU, Xiuwei Yang","doi":"10.1364/josab.501776","DOIUrl":"https://doi.org/10.1364/josab.501776","url":null,"abstract":"","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135321516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Effect of Birefringence on the Scattering of the Classically Entangled Beam Generated by a Common-Path Technique","authors":"Bibek Patra, Abhishek Mandal, Maruthi Brundavanam","doi":"10.1364/josab.494693","DOIUrl":"https://doi.org/10.1364/josab.494693","url":null,"abstract":"","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135272679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Timothy True, Christopher Rice, Greg Pitz, Glen Perram
Pump modulated laser absorption spectroscopy was used to measure the cesium 5 2 D 5/2 →10 2 F 5/2,7/2 line shape. Alkali density in an optically pumped low pressure cell was increased from 0.5 to 85×10 12 cm −3 , resulting in a factor of 200 increase in Lorentzian width due to Stark broadening (2.76GHz/10 12 cm −3 ). The observed red shift is consistent with literature, and the shift-to-width ratio δ / γ =−0.356±0.015 informs an electron temperature of 1820±100K. A linear trend between alkali density and electron density is seen, suggesting that electron impact is the primary plasma production mechanism. A maximum ionized concentration of 28% was observed.
{"title":"Stark Broadening of the Cesium 5D-10F Line Shape","authors":"Timothy True, Christopher Rice, Greg Pitz, Glen Perram","doi":"10.1364/josab.496373","DOIUrl":"https://doi.org/10.1364/josab.496373","url":null,"abstract":"Pump modulated laser absorption spectroscopy was used to measure the cesium 5 2 D 5/2 →10 2 F 5/2,7/2 line shape. Alkali density in an optically pumped low pressure cell was increased from 0.5 to 85×10 12 cm −3 , resulting in a factor of 200 increase in Lorentzian width due to Stark broadening (2.76GHz/10 12 cm −3 ). The observed red shift is consistent with literature, and the shift-to-width ratio δ / γ =−0.356±0.015 informs an electron temperature of 1820±100K. A linear trend between alkali density and electron density is seen, suggesting that electron impact is the primary plasma production mechanism. A maximum ionized concentration of 28% was observed.","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135111553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
HARSHVARDHAN KUMAR, TANISHA BOHRA, APOORV SHARMA, P Susthitha Menon, Agus Hatta
{"title":"Polarization Diversity Schemes for Gas Sensing Applications: A Comprehensive Analysis and Optimal Design of High-Performance Si1-xGex Mid-Infrared Asymmetric Rib Cross-Slot Waveguides","authors":"HARSHVARDHAN KUMAR, TANISHA BOHRA, APOORV SHARMA, P Susthitha Menon, Agus Hatta","doi":"10.1364/josab.504250","DOIUrl":"https://doi.org/10.1364/josab.504250","url":null,"abstract":"","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Design and pulse-formation properties of chirped-pulse Kerr solitons","authors":"Xue Dong, William Renninger","doi":"10.1364/josab.502453","DOIUrl":"https://doi.org/10.1364/josab.502453","url":null,"abstract":"","PeriodicalId":17280,"journal":{"name":"Journal of The Optical Society of America B-optical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：