OpticaPub Date : 2024-01-11DOI: 10.1364/optica.506813
Xueji Wang, Ziyi Yang, Fanglin Bao, Tyler Sentz, and Zubin Jacob
{"title":"Spinning metasurface stack for spectro-polarimetric thermal imaging","authors":"Xueji Wang, Ziyi Yang, Fanglin Bao, Tyler Sentz, and Zubin Jacob","doi":"10.1364/optica.506813","DOIUrl":"https://doi.org/10.1364/optica.506813","url":null,"abstract":"Spectro-polarimetric imaging in the long-wave infrared (LWIR) region plays a crucial role in applications from night vision and machine perception to trace gas sensing and thermography. However, the current generation of spectro-polarimetric LWIR imagers suffers from limitations in size, spectral resolution, and field of view (FOV). While meta-optics-based strategies for spectro-polarimetric imaging have been explored in the visible spectrum, their potential for thermal imaging remains largely unexplored. In this work, we introduce an approach for spectro-polarimetric decomposition by combining large-area stacked meta-optical devices with advanced computational imaging algorithms. The co-design of a stack of spinning dispersive metasurfaces along with compressive sensing and dictionary learning algorithms allows simultaneous spectral and polarimetric resolution without the need for bulky filter wheels or interferometers. Our spinning-metasurface-based spectro-polarimetric stack is compact (<span><span style=\"color: inherit;\"><span><span><span style=\"margin-left: 0.333em; margin-right: 0.333em;\"><</span></span><span style=\"width: 0.278em; height: 0em;\"></span><span><span>10</span></span><span style=\"margin-left: 0.267em; margin-right: 0.267em;\">×</span><span><span>10</span></span><span style=\"margin-left: 0.267em; margin-right: 0.267em;\">×</span><span><span>10</span></span><span style=\"width: 0.278em; height: 0em;\"></span><span><span>c</span><span>m</span></span></span></span><script type=\"math/tex\">{lt};{10} times {10} times {10};{rm cm}</script></span>) and robust, and it offers a wide field of view (20.5°). We show that the spectral resolving power of our system substantially enhances performance in machine learning tasks such as material classification, a challenge for conventional panchromatic thermal cameras. Our approach represents a significant advance in the field of thermal imaging for a wide range of applications including heat-assisted detection and ranging (HADAR).","PeriodicalId":19515,"journal":{"name":"Optica","volume":"43 1","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139468516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
OpticaPub Date : 2024-01-08DOI: 10.1364/optica.510591
M. Hamrouni, M. Jankowski, Alexander Hwang, N. Jornod, J. Mishra, H. Stokowski, Timothy McKenna, Carsten Langrock, Thomas Südmeyer, Amir Safavi-Naeini, M. Fejer
{"title":"Efficient parametric downconversion by gain-trapped solitons","authors":"M. Hamrouni, M. Jankowski, Alexander Hwang, N. Jornod, J. Mishra, H. Stokowski, Timothy McKenna, Carsten Langrock, Thomas Südmeyer, Amir Safavi-Naeini, M. Fejer","doi":"10.1364/optica.510591","DOIUrl":"https://doi.org/10.1364/optica.510591","url":null,"abstract":"","PeriodicalId":19515,"journal":{"name":"Optica","volume":"44 1","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139444941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
OpticaPub Date : 2024-01-05DOI: 10.1364/optica.510202
Han Gao, Haifeng Hu, Qiwen Zhan
{"title":"Generation and Applications of Spectral-Spatially Correlated Principal Mode","authors":"Han Gao, Haifeng Hu, Qiwen Zhan","doi":"10.1364/optica.510202","DOIUrl":"https://doi.org/10.1364/optica.510202","url":null,"abstract":"","PeriodicalId":19515,"journal":{"name":"Optica","volume":"29 2","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139381925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
OpticaPub Date : 2024-01-04DOI: 10.1364/optica.504397
Matan Iluz, Kobi Cohen, Jacob Kheireddine, Yoav Hazan, Amir Rosenthal, Shai Tsesses, and Guy Bartal
{"title":"Unveiling the evolution of light within photonic integrated circuits","authors":"Matan Iluz, Kobi Cohen, Jacob Kheireddine, Yoav Hazan, Amir Rosenthal, Shai Tsesses, and Guy Bartal","doi":"10.1364/optica.504397","DOIUrl":"https://doi.org/10.1364/optica.504397","url":null,"abstract":"Silicon photonics leverages mature semiconductor technology to produce cost-effective and high-performance components for various applications in data centers, artificial intelligence, and quantum computing. While the geometry of photonic integrated circuits can be characterized by existing means, their optimal and accurate performance requires detailed characterization of the light propagating within them. Here we demonstrate the first, to our knowledge, direct visualization of the light as it travels inside photonic integrated circuits. We employ the natural nonlinear optical properties of silicon to directly map the electric field of the waves guided inside the integrated circuits, characterizing waveguides and multimode splitters while extracting various parameters of the device—all in real-time and in a noninvasive manner. Our approach for visualizing light inside photonic circuits is the only solution directly providing such information without any overhead or penalty, potentially making it a crucial component for the characterization of photonic circuitry, toward their improved design, fabrication, and optimization.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"98 1","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139101413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
OpticaPub Date : 2024-01-04DOI: 10.1364/optica.506572
Yunhui Gao and Liangcai Cao
{"title":"Motion-resolved, reference-free holographic imaging via spatiotemporally regularized inversion","authors":"Yunhui Gao and Liangcai Cao","doi":"10.1364/optica.506572","DOIUrl":"https://doi.org/10.1364/optica.506572","url":null,"abstract":"Holography is a powerful technique that records the amplitude and phase of an optical field simultaneously, enabling a variety of applications such as label-free biomedical analysis and coherent diffraction imaging. Holographic recording without a reference wave has been long pursued because it obviates the high experimental requirements of conventional interferometric methods. However, due to the ill-posed nature of the underlying phase retrieval problem, reference-free holographic imaging is faced with an inherent tradeoff between imaging fidelity and temporal resolution. Here, we propose a general computational framework, termed spatiotemporally regularized inversion (STRIVER), to achieve motion-resolved, reference-free holographic imaging with high fidelity. Specifically, STRIVER leverages signal priors in the spatiotemporal domain to jointly eliminate phase ambiguities and motion artifacts, and, when combined with diversity measurement schemes, produces a physically reliable, time-resolved holographic video from a series of intensity-only measurements. We experimentally demonstrate STRIVER in near-field ptychography, where dynamic holographic imaging of freely swimming paramecia is performed at a framerate-limited speed of 112 fps. The proposed method can be potentially extended to other measurement schemes, spectral regimes, and computational imaging modalities, pushing the temporal resolution toward higher limits.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"11 1","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139101310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
OpticaPub Date : 2024-01-03DOI: 10.1364/optica.506353
Francesco Canella, Johannes Weitenberg, Muhammad Thariq, Fabian Schmid, Paras Dwivedi, Gianluca Galzerano, Theodor W. Hänsch, Thomas Udem, and Akira Ozawa
{"title":"Low-repetition-rate optical frequency comb","authors":"Francesco Canella, Johannes Weitenberg, Muhammad Thariq, Fabian Schmid, Paras Dwivedi, Gianluca Galzerano, Theodor W. Hänsch, Thomas Udem, and Akira Ozawa","doi":"10.1364/optica.506353","DOIUrl":"https://doi.org/10.1364/optica.506353","url":null,"abstract":"Reducing the pulse repetition rate of an optical frequency comb increases the pulse energy for a given average power. This enhances the efficiency of nonlinear frequency conversion and it facilitates extending the accessible wavelength range, for example, into the extreme ultraviolet (XUV). The resulting spectrally dense frequency comb can still be used for precision spectroscopy of narrow atomic or molecular transitions. In this paper, we demonstrate a low-noise infrared frequency comb with a repetition rate as low as 40 kHz using a Yb:KYW mode-locked laser, pulse picking, and subsequent amplification. The frequency comb structure is confirmed by generating a beat note with a continuous wave reference laser. A comb mode is actively stabilized to the reference laser, and the integrated rms phase noise from 20 Hz to 20 kHz is measured to be 195 mrad.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"64 1","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139091417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
OpticaPub Date : 2024-01-03DOI: 10.1364/optica.500036
Shan Hao and Thomas P. Purdy
{"title":"Back action evasion in optical lever detection","authors":"Shan Hao and Thomas P. Purdy","doi":"10.1364/optica.500036","DOIUrl":"https://doi.org/10.1364/optica.500036","url":null,"abstract":"The optical lever is a centuries old and widely used detection technique employed in applications ranging from consumer products and industrial sensors to precision force microscopes used in scientific research. However, despite the long history, its quantum limits have yet to be explored. In general, any precision optical measurement is accompanied by optical force induced disturbance to the measured object (termed as back action) leading to a standard quantum limit (SQL). Here, we give a simple ray optics description of how such back action can be evaded in optical lever detection. We perform a proof-of-principle experiment demonstrating the mechanism of back action evasion in the classical regime, by developing a lens system that cancels extra tilting of the reflected light off a silicon nitride membrane mechanical resonator caused by laser-pointing-noise-induced optical torques. We achieve a readout noise floor two orders of magnitude lower than the SQL, corresponding to an effective optomechanical cooperativity of 100 without the need for an optical cavity. As the state-of-the-art ultralow dissipation optomechanical systems relevant for quantum sensing are rapidly approaching the level where quantum noise dominates, simple and widely applicable back action evading protocols will be crucial for pushing beyond quantum limits.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"52 1","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139091101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}
OpticaPub Date : 2024-01-02DOI: 10.1364/optica.505377
Lingxiao Yang, Janet E. Sorrells, Rishyashring R. Iyer, Eric Chaney, Stephen Boppart
{"title":"Label-free multimodal polarization-sensitive optical microscope for multiparametric quantitative characterization of collagen","authors":"Lingxiao Yang, Janet E. Sorrells, Rishyashring R. Iyer, Eric Chaney, Stephen Boppart","doi":"10.1364/optica.505377","DOIUrl":"https://doi.org/10.1364/optica.505377","url":null,"abstract":"","PeriodicalId":19515,"journal":{"name":"Optica","volume":"34 19","pages":""},"PeriodicalIF":10.4,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139389722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}