OpticaPub Date : 2023-11-07DOI: 10.1364/optica.493732
Yisheng Lei, Faezeh Kimiaee Asadi, Tian Zhong, Alex Kuzmich, Christoph Simon, and Mahdi Hosseini
{"title":"Quantum optical memory for entanglement distribution","authors":"Yisheng Lei, Faezeh Kimiaee Asadi, Tian Zhong, Alex Kuzmich, Christoph Simon, and Mahdi Hosseini","doi":"10.1364/optica.493732","DOIUrl":"https://doi.org/10.1364/optica.493732","url":null,"abstract":"Optical photons are powerful carriers of quantum information, which can be delivered in free space by satellites or in fibers on the ground over long distances. Entanglement of quantum states over long distances can empower quantum computing, quantum communications, and quantum sensing. Quantum optical memories are devices designed to store quantum information in the form of stationary excitations, such as atomic coherence, and are capable of coherently mapping these excitations to flying qubits. Quantum memories can effectively store and manipulate quantum states, making them indispensable elements in future long-distance quantum networks. Over the past two decades, quantum optical memories with high fidelities, high efficiencies, long storage times, and promising multiplexing capabilities have been developed, especially at the single-photon level. In this review, we introduce the working principles of commonly used quantum memory protocols and summarize the recent advances in quantum memory demonstrations. We also offer a vision for future quantum optical memory devices that may enable entanglement distribution over long distances.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"56 9","pages":""},"PeriodicalIF":10.4,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71517147","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 : 2023-11-06DOI: 10.1364/optica.496026
Juwon Choi, Byoung-Uk Sohn, Ezgi Sahin, George F. R. Chen, Peng Xing, Doris K. T. Ng, Benjamin J. Eggleton, and Dawn T. H. Tan
{"title":"Pure-quartic Bragg solitons in chip-scale nonlinear integrated circuits","authors":"Juwon Choi, Byoung-Uk Sohn, Ezgi Sahin, George F. R. Chen, Peng Xing, Doris K. T. Ng, Benjamin J. Eggleton, and Dawn T. H. Tan","doi":"10.1364/optica.496026","DOIUrl":"https://doi.org/10.1364/optica.496026","url":null,"abstract":"Pure-quartic solitons have gained significant attention recently due to their ability to achieve higher energy than classical solitons for short pulse durations, leveraging the interaction between self-phase modulation and anomalous fourth-order dispersion. However, challenges in generating the required dispersion profile and the scarcity of sufficiently low-loss devices with high nonlinearity and negligible nonlinear loss have restricted experimental progress. In this paper, we report a class of pure-quartic Bragg solitons that balances self-phase modulation and the ultra-strong Bragg-grating-induced negative fourth-order dispersion in combination with negligible group velocity dispersion and negligible third-order dispersion. We demonstrate pure-quartic Bragg soliton-effect compression of <span><span style=\"color: inherit;\"><span><span><span>2.4</span></span><span style=\"margin-left: 0.267em; margin-right: 0.267em;\">×</span></span></span><script type=\"math/tex\">{2.4} times</script></span> in a compact millimeter-scale integrated low-loss and highly nonlinear waveguide circuit. Our findings show the potential of exploiting the exceptional dispersion profile of nonlinear Bragg gratings for advanced soliton generation and pulse shaping, particularly the advantageous energy scaling and associated compression of pure-quartic solitons.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"22 4","pages":""},"PeriodicalIF":10.4,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71509807","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 : 2023-11-06DOI: 10.1364/optica.494050
Jaesung Heo, Junghyun Kim, Taek Jeong, Yong Sup Ihn, Duk Y. Kim, Zaeill Kim, and Yonggi Jo
{"title":"Quantum-secured single-pixel imaging with enhanced security","authors":"Jaesung Heo, Junghyun Kim, Taek Jeong, Yong Sup Ihn, Duk Y. Kim, Zaeill Kim, and Yonggi Jo","doi":"10.1364/optica.494050","DOIUrl":"https://doi.org/10.1364/optica.494050","url":null,"abstract":"In this paper, we propose a quantum-secured single-pixel imaging method that utilizes non-classical correlations of a photon pair. Our method can detect any attempts to deceive it by exploiting a non-classical correlation of photon pairs while rejecting strong chaotic light illumination through photon heralding. A security analysis based on polarization-correlation has been conducted, demonstrating that our method has improved security compared to existing quantum-secured imaging. More specifically, a partial deceiving attack, which sends a mixture of a true and a false signal, can be detected with our proposed analysis, while currently employed methods cannot. We also provide proof-of-principle demonstrations of our method and trustworthy images reconstructed using our security analysis. Our method can be developed using matured techniques used in quantum secure communication, thus offering a promising direction for practical applications in secure imaging.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"22 5","pages":""},"PeriodicalIF":10.4,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71509806","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 : 2023-11-06DOI: 10.1364/optica.505283
Haowen Zhou, Brandon Feng, Haiyun Guo, Siyu lin, Mingshu Liang, Chris Metzler, Changhuei Yang
{"title":"FPM-INR: Fourier ptychographic microscopy image stack reconstruction using implicit neural representations","authors":"Haowen Zhou, Brandon Feng, Haiyun Guo, Siyu lin, Mingshu Liang, Chris Metzler, Changhuei Yang","doi":"10.1364/optica.505283","DOIUrl":"https://doi.org/10.1364/optica.505283","url":null,"abstract":"Image stacks provide invaluable 3D information in various biological and pathological imaging applications. Fourier ptychographic microscopy (FPM) enables reconstructing high-resolution, wide field-of-view image stacks without z-stack scanning, thus significantly accelerating image acquisition. However, existing FPM methods take tens of minutes to reconstruct and gigabytes of memory to store a high-resolution volumetric scene, impeding fast gigapixel-scale remote digital pathology. While deep learning approaches have been explored to address this challenge, existing methods poorly generalize to novel datasets and can produce unreliable hallucinations. This work presents FPM-INR, a compact and efficient framework that integrates physics-based optical models with implicit neural representations (INR) to represent and reconstruct FPM image stacks. FPM-INR is agnostic to system design or sample types and does not require external training data. In our demonstrated experiments, FPM-INR substantially outperforms traditional FPM algorithms with up to a 25-fold increase in speed and an 80-fold reduction in memory usage for continuous image stack representations.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"3 7‐8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135589330","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 : 2023-11-06DOI: 10.1364/optica.489501
Alessandro Lupo, Enrico Picco, Marina Zajnulina, and Serge Massar
{"title":"Deep photonic reservoir computer based on frequency multiplexing with fully analog connection between layers","authors":"Alessandro Lupo, Enrico Picco, Marina Zajnulina, and Serge Massar","doi":"10.1364/optica.489501","DOIUrl":"https://doi.org/10.1364/optica.489501","url":null,"abstract":"Reservoir computers (RCs) are randomized recurrent neural networks well adapted to process time series, performing tasks such as nonlinear distortion compensation or prediction of chaotic dynamics. Deep reservoir computers (deep-RCs), in which the output of one reservoir is used as the input for another one, can lead to improved performance because, as in other deep artificial neural networks, the successive layers represent the data in more and more abstract ways. We present a fiber-based photonic implementation of a two-layer deep-RC based on frequency multiplexing. The two RC layers are encoded in two frequency combs propagating in the same experimental setup. The connection between the layers is fully analog and does not require any digital processing. We find that the deep-RC outperforms a traditional RC by up to two orders of magnitude on two benchmark tasks. This work paves the way towards using fully analog photonic neuromorphic computing for complex processing of time series, while avoiding costly analog-to-digital and digital-to-analog conversions.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"22 3","pages":""},"PeriodicalIF":10.4,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71509808","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 : 2023-11-06DOI: 10.1364/optica.491965
Ben M. Burridge, Imad I. Faruque, John G. Rarity, and Jorge Barreto
{"title":"Integrate and scale: a source of spectrally separable photon pairs","authors":"Ben M. Burridge, Imad I. Faruque, John G. Rarity, and Jorge Barreto","doi":"10.1364/optica.491965","DOIUrl":"https://doi.org/10.1364/optica.491965","url":null,"abstract":"Integrated photonics is a powerful contender in the race for a fault-tolerant quantum computer, claiming to be a platform capable of scaling to the necessary number of qubits. This necessitates the use of high-quality quantum states, which we create here using an all-around high-performing photon source on an integrated photonics platform. We use a photonic molecule architecture and broadband directional couplers to protect against fabrication tolerances and ensure reliable operation. As a result, we simultaneously measure a spectral purity of <span><span>99.1 pm 0.1%</span><script type=\"math/tex\">99.1 pm 0.1%</script></span>, a pair generation rate of <span><span>4.4 pm 0.1;{rm MHz},{{rm mW}^{- 2}}</span><script type=\"math/tex\">4.4 pm 0.1;{rm MHz},{{rm mW}^{- 2}}</script></span>, and an intrinsic source heralding efficiency of <span><span>94.0 pm 2.9%</span><script type=\"math/tex\">94.0 pm 2.9%</script></span>. We also see a maximum coincidence-to-accidental ratio of <span><span>1644 pm 263</span><script type=\"math/tex\">1644 pm 263</script></span>. We claim over an order of magnitude improvement in the trivariate trade-off among source heralding efficiency, purity, and brightness. Future implementations of the source could achieve in excess of 99% purity and heralding efficiency using the lowest reported propagation losses.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"22 6","pages":""},"PeriodicalIF":10.4,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71509805","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 : 2023-11-03DOI: 10.1364/optica.508141
Caique Rodrigues, Nick Schilder, Roberto Zurita, Leticia Magalhaes, Amirhassan Shams-Ansari, Thiago Alegre, Marko Loncar, Gustavo Wiederhecker
{"title":"On-Chip Backward Stimulated Brillouin Scattering in Lithium Niobate Waveguides","authors":"Caique Rodrigues, Nick Schilder, Roberto Zurita, Leticia Magalhaes, Amirhassan Shams-Ansari, Thiago Alegre, Marko Loncar, Gustavo Wiederhecker","doi":"10.1364/optica.508141","DOIUrl":"https://doi.org/10.1364/optica.508141","url":null,"abstract":"We report on the first experimental demonstration of backward stimulated Brillouin scattering (SBS) in Lithium Niobate on Insulator (LNOI) waveguides. Performing polarization-dependent pump-probe experiments, we successfully quantified both intramodal and intermodal scattering among fundamental modes, showcasing substantial gains up to $G_{B}=$10m$^{-1}$W$^{-1}$. Such large gains on simple waveguides open a pathway for unlocking novel opto-electro-mechanical phenomena within the LNOI platform.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"55 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135819557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
OpticaPub Date : 2023-11-02DOI: 10.1364/optica.502221
Dominik Rattenbacher, Alexey Shkarin, Vahid Sandoghdar, Tobias Utikal, Jan Renger, Stephan Götzinger
{"title":"On-chip interference of scattering from two individual molecules","authors":"Dominik Rattenbacher, Alexey Shkarin, Vahid Sandoghdar, Tobias Utikal, Jan Renger, Stephan Götzinger","doi":"10.1364/optica.502221","DOIUrl":"https://doi.org/10.1364/optica.502221","url":null,"abstract":"Integrated photonic circuits offer a promising route for studying coherent cooperative effects of a controlled collection of quantum emitters. However, spectral inhomogeneities, decoherence and material incompatibilities in the solid state make this a nontrivial task. Here, we demonstrate efficient coupling of a pair of organic molecules embedded in a plastic film to a TiO$_2$ microdisc resonator on a glass chip. Moreover, we tune the resonance frequencies of the molecules with respect to that of the microresonator by employing nanofabricated electrodes. For two molecules separated by a distance of about 8$,mu$m and an optical phase difference of about $pi/2$, we report on a large collective extinction of the incident light in the forward direction and the destructive interference of its scattering in the backward direction. Our work sets the ground for the coherent coupling of several molecules via a common mode and the realization of polymer-based hybrid quantum photonic circuits.","PeriodicalId":19515,"journal":{"name":"Optica","volume":"8 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135972708","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}