ACS Photonics最新文献

{"title":"Ultracompact Spatial Speckle Reconstructive Spectrometer Based on a Waveguide Corner with Chaotic Reflection","authors":"Zhipeng Guo, Long Zhang, Daoxin Dai","doi":"10.1021/acsphotonics.4c02401","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02401","url":null,"abstract":"On-chip spectrometers offer significant advantages in terms of compactness and portability, paving the way for advancements in both industrial applications and scientific research. The growing demand for high-performance and miniaturized spectral sensing modules is particularly evident in applications such as smartphones and wearable sensors. In this paper, we introduce and demonstrate an ultracompact and high-performance spatial speckle reconstructive spectrometer, which utilizes chaotic reflection achieved with a waveguide corner consisting of a randomly rough reflecting facet, resulting in chaotic spectral responses at multiple output ports within an ultracompact footprint. Additionally, we propose the concept of segmenting and switching the working window to enable enhanced spectral resolution by sacrificing a certain amount of working bandwidth. This also facilitates the combination of multiple sub-bands to achieve both high resolution and broad bandwidth. We combine innovative schemes and a convex optimization algorithm, leading to a remarkable resolution of 0.02 nm for the spectral range of 1520–1610 nm even with an ultracompact size of 250 μm² for the fabricated chip. To the best of our knowledge, the present spatial-domain speckle reconstructive spectrometer shows the highest channel-number-to-footprint ratio (λ_bandwidth/(λ_res·footprint)) of up to 1.8 × 10⁷ mm^–2, offering a promising option for on-chip spectral analysis.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"56 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660875","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}

{"title":"Cavity-Enhanced Acousto-Optic Modulators on Polymer-Loaded Lithium Niobate Integrated Platform","authors":"Zhi Jiang, Danyang Yao, Yu Gao, Xu Ran, Jianguo Wang, Xuetao Gan, Yan Liu, Yue Hao, Genquan Han","doi":"10.1021/acsphotonics.4c02302","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02302","url":null,"abstract":"On-chip acousto-optic (AO) modulation represents a significant advancement in the development of highly integrated information processing systems. However, conventional photonic devices face substantial challenges in achieving efficient conversion due to the limited overlap between acoustic waves and optical waves. In this study, we address this limitation by demonstrating an enhanced conversion effect of photonic crystal nanobeam cavity (PCNBC) in AO modulation on a polymer-loaded lithium niobate integrated platform. Attributed to the high quality factor to mode volume ratio (<i>Q</i>/<i>V</i>) and optimal light-sound overlap within the nanocavity, PCNBC-based AO modulator exhibits a significantly enhanced extinction ratio of 38 dB with a threshold RF power below −50 dBm, which is two orders of magnitude lower than that based on microring resonator (MRR). In addition, robust digital amplitude shift keying modulations were performed using selected RF and optical channels of the PCNBC-enhanced AO modulators. These findings validate the compelling properties of the PCNBC photonic platform, establishing it as a promising candidate for on-chip integrated microwave photonics, optical transceivers, and computing applications.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"15 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666714","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}

{"title":"An Interview with Anne L’Huillier","authors":"Romain Quidant","doi":"10.1021/acsphotonics.5c00411","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00411","url":null,"abstract":"&lt;b&gt;Romain Quidant&lt;/b&gt;: Thank you so much, Prof. L’Huillier, for your time. I’m very glad you accepted my invitation to participate in this &lt;i&gt;ACS Photonics&lt;/i&gt; interview series. I would like to get started with a question you were probably asked many times: What initially sparked your interest in Science? What motivated the young Anne L’Huillier to study Physics and Mathematics? Was that an early fascination from your childhood or maybe an inspiring teacher in middle or high school? &lt;b&gt;Anne L’Huillier&lt;/b&gt;: I do not entirely recall any specific trigger. As I remember, I have always been interested in physics and mathematics. Having scientists in my family has certainly been a source of inspiration. My grandfather was a radio engineer who used his skills during World War II to support the Resistance, and my father was an engineer in informatics. It seems to me I have always been drawn to science. Then I also had good teachers. I remember very good teachers in mathematics at the end of high school in Paris and then very good teachers in physics during my studies.&lt;img alt=\"\" src=\"/cms/10.1021/acsphotonics.5c00411/asset/images/medium/ph5c00411_0001.gif\"/&gt; &lt;b&gt;Romain Quidant&lt;/b&gt;: Following up on this, who were your biggest mentors or role models in your early career, and how did they influence your research directions? &lt;b&gt;Anne L’Huillier&lt;/b&gt;: Claude Cohen-Tannoudji stands out as a particularly influential figure for me. He was a fantastic teacher, and I greatly admired his approach. His teaching was rigorous and grounded in mathematics, yet he always emphasized the physical meaning behind the equations. I especially enjoyed his quantum mechanics course, particularly light–matter interaction. This sparked my interest in the field and ultimately led me to pursue a Ph.D., studying atoms in strong laser fields. So, yes, Cohen-Tannoudji was a true role model. Additionally, beyond my specific research area, learning about Marie Curie’s achievements was also significant. While her work was not related to my own, it was incredibly inspiring to know that a woman could achieve such remarkable success in science. Later in my career, I benefited from several mentors. Toward the end of my Ph.D., I reached out to a Swedish theoretician, Göran Wendin, for help in interpreting our experiments. I then spent six months in Gothenburg as a postdoc. Later Sune Svanberg provided invaluable support during the early stages of my career in Lund. &lt;b&gt;Romain Quidant&lt;/b&gt;: While awareness of gender bias has grown considerably, it was far less prominent in the 1980s and 1990s. Can you share any experiences from that period that highlighted the challenges women faced in physics? &lt;b&gt;Anne L’Huillier&lt;/b&gt;: That is a difficult question. It certainly was not always easy being a woman in a predominantly male environment. I would say yes, I likely experienced some challenges due to my gender. However, being a woman also brought a degree of visibility, and I was fortunate to receive support fr","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"91 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653919","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}

{"title":"Ultraviolet Metalens Based on Nonlinear Wavefront Manipulation of Lithium Niobate Metasurfaces","authors":"Yunan Liu, Bo Wang, Leyong Hu, Xu Ji, Tingyue Zhu, Ruhao Pan, Haifang Yang, Changzhi Gu, Junjie Li","doi":"10.1021/acsphotonics.4c02259","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02259","url":null,"abstract":"Nonlinear metalens has revolutionized the generation and focusing of nonlinear harmonic waves, significantly enhancing the performance of nonlinear frequency converters and expanding the applications of metalens from linear optics to nonlinear optics. However, current nonlinear metalens are typically constructed using low-nonlinear-susceptibility materials, impeding further advancements in the field. Here, we have developed a nonlinear metalens utilizing crystallized lithium niobate (LN), a material with a large second-order susceptibility and a broad transparent window. The meta-atoms of the LN metalens consist of elliptical nanoholes, fabricated by using a self-developed multiatmosphere cooperative etching technique. With a diameter of 200 μm, our fabricated metalens can focus the second harmonic wave at 390 nm to a 0.7-μm-wide spot with a focus length of 100 μm, resulting in a numerical aperture of 0.7. The peak intensity of the focus plane is enhanced by 40 times. Our LN metalens has potential applications in versatile nonlinear meta-optic devices for highly efficient frequency converting, high-resolution imaging, and bright entangled photopairs.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"183 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660879","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}

{"title":"An Interview with Anne L’Huillier","authors":"Romain Quidant,&nbsp;","doi":"10.1021/acsphotonics.5c0041110.1021/acsphotonics.5c00411","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00411https://doi.org/10.1021/acsphotonics.5c00411","url":null,"abstract":"","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 3","pages":"1252–1255 1252–1255"},"PeriodicalIF":6.5,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143641574","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}

{"title":"Circularly Polarized Stimulated Emission from a Chiral Cavity Based on Apparent Circular Dichroism Organic Thin Films","authors":"Li-Zhi Lin, Ling-Qi Huang, Shi-Wei You, Yi-Jan Huang, Francesco Zinna, Andrew Salij, Lorenzo Di Bari, Randall H. Goldsmith, Roel Tempelaar, Chia-Yen Huang, Tzu-Ling Chen","doi":"10.1021/acsphotonics.4c02560","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02560","url":null,"abstract":"The lack of intrinsic mirror symmetry in cavity mirrors poses a significant challenge for most organic chiral materials in generating circularly polarized (CP) lasers. However, nonreciprocal chiroptical materials, such as recently developed organic thin films exhibiting apparent circular dichroism (ACD), provide a promising approach to CP light generation. In this work, we integrate an ACD-based thin film into a free-space dye laser cavity, achieving direct CP laser emission with a degree of circular polarization (DOCP) up to 0.6, corresponding to a dissymmetry factor (<i>g</i>_lum) of 1.2, a new record for organic chiral lasers. The degree of polarization (DOP) is close to 0.8, and the observed ellipticity in the emitted light originates from the ACD effect in the thin film, leading to asymmetric cavity losses for right- and left-circularly polarized light. This breakthrough demonstrates the potential of ACD-based materials to overcome the limitations of conventional chiral laser systems, marking a significant advancement in the field and paving the way for next-generation chiral photonic devices.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"183 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653916","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}

{"title":"High-Quality Plasmonic Lasing with Topologically Trivial or Nontrivial Polarization","authors":"Mengyuan Song, Xinyu Gao, Chenghao Bai, Jun Guan, Xianyu Ao","doi":"10.1021/acsphotonics.5c00421","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00421","url":null,"abstract":"This paper reports how a simple plasmonic lattice, containing only one metal nanoparticle in the unit cell, can produce lasing beams with various polarization patterns. Using arrays of aluminum nanoparticles covered with dye solutions, we demonstrated topologically trivial and nontrivial lasing in the near-infrared regime under nanosecond-pulsed optical pumping. Although the aluminum nanoparticles exhibit high Ohmic losses, the lasing emissions showed narrow line widths below 0.05 nm and a long coherence time of hundreds of picoseconds. By comparing the polarization-resolved far-field emission patterns with the characteristics of simulated photonic modes, we identified the lasing cavity modes as bound states in the continuum or surface lattice resonances of electric and magnetic types. Our analysis shows that lasing action preferentially emerges from a flatter photonic band, regardless of whether the mode corresponds to a bright surface lattice resonance or a dark bound state in the continuum.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"20 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660878","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}

{"title":"Optically Nonlinear Structures in Glass by Electron Lithography: Direct Writing","authors":"S. A. Scherbak, A. N. Terpitskiy, I. V. Reshetov, I. V. Reduto, V. P. Kaasik, V. V. Zhurikhina, A. A. Lipovskii","doi":"10.1021/acsphotonics.4c02433","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02433","url":null,"abstract":"Standard e-beam lithography system is used for writing a set of charged regions in glass, which provide patterned area possessing electric-field-induced quadratic optical nonlinearity. Patterned glass provides second optical harmonic generation (SHG) under a normal incident fundamental wave. Grating-like regions with periodicity from 2 to 32 μm demonstrate diffraction-like radiation patterns due to the interference of the second harmonic waves in the far-field radiation zone. Polarization studies of SHG using a grating of nonlinear regions allowed us to conclude that the Kleinman symmetry for the third order nonlinear susceptibility of isotropic media, <i>χ</i>_<i>xxyy</i>⁽³⁾_/<i>χ</i>_<i>xxxx</i>⁽³⁾ = <i>χ</i>_<i>xyxy</i>⁽³⁾_/<i>χ</i>_<i>xxxx</i>⁽³⁾ = 1/3, is valid with a high accuracy despite of the participation of DC electric field in the nonlinear interaction. A second harmonic radiation pattern can be specified by the geometry of a structure written by e-beam lithography.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"14 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660657","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}

{"title":"Long-Range Coherent Emission of Propagating Exciton–Polaritons from a Mach–Zehnder Interferometer","authors":"Jeffrey Horowitz, Bin Liu, Sritoma Paul, Stephen R. Forrest","doi":"10.1021/acsphotonics.4c02442","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02442","url":null,"abstract":"Long-range coherence of the part-matter, part-light exciton–polariton has potential applications in all-optical logic that combine the large nonlinearity of the matter component with the delocalization by the light component. A polariton condensate has been shown to have long-range coherence, although the formation of a condensate requires complex device fabrication and well-defined operation conditions. In this work, we demonstrate a Mach–Zehnder interferometer that exhibits room-temperature, long-range coherent propagation of Bloch surface wave polaritons (BSWPs) that does not depend on the formation of a condensate. Due to strong coupling of the organic exciton and the delocalized BSW supported by a distributed Bragg reflector (DBR), the hybrid light–matter states sustain coherence over distances of ∼50 μm, giving rise to wavelength-dependent interference patterns within the devices. Our results show that the BSWP represents a promising platform for room-temperature coherent polaritonic devices, thus enabling integrated photonic circuits that operate under ambient conditions.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"24 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653917","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}

{"title":"Large-Area Microtransfer-Printed Thin-Film Lithium Niobate-Silicon Nitride Microring Optical Filter with Nanosecond Tuning Speed","authors":"Jinwei Su, Wei Gao, Zekun Cui, Liangjun Lu, Kan Wu, Jianping Chen, Linjie Zhou","doi":"10.1021/acsphotonics.4c02508","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02508","url":null,"abstract":"The silicon nitride (Si₃N₄) platform has garnered significant attention as a promising integrated photonics platform. However, it encounters substantial challenges in achieving power-efficient and high-speed phase shifting. The heterogeneous integration of thin-film lithium niobate (TFLN) onto commercially available ultralow-loss Si₃N₄ platforms combines the strengths of both materials, enabling the development of advanced integrated photonic devices. Recently, micro-transfer printing (MTP) has emerged as a versatile heterogeneous integration technique. However, the limited size of transferable coupon restricts the integration of large devices. In this letter, we propose a novel MTP method to transfer a TFLN coupon over 250 × 750 μm² onto a Si₃N₄ chip. This approach facilitates the first demonstration of an MTP-based TFLN-Si₃N₄ heterogeneously integrated tunable microring resonator, featuring a 3 dB optical bandwidth of 1.2 GHz, a tuning efficiency of 2 pm/V, and a response time of less than 3 ns. To further reduce insertion loss, we design an efficient coupler (∼0.5 dB/facet) with a large misalignment tolerance (more than ±1.75 μm) for MTP, capable of operating within the misalignment errors of our MTP process. The measured loss is approximately 0.5 dB/facet at the C-band. Moreover, using this MTP method, we demonstrate MTP-available coupons with sizes exceeding 230 × 2000 μm². This research enhances the versatility of MTP and broadens its potential applications.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"19 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653918","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}