ACS Photonics最新文献

{"title":"Demonstration of Photonic Integrated Circuit Seed Laser System: Toward Space-Based Water Vapor and Methane Differential Absorption Lidar","authors":"Nathan Dostart, Amin Nehrir, Jes Sherman, Don Kebort, Trevor Cooper, Thomas ZY Liu, Amalu Shimamura, David Harper, Charles Antill, Rory Barton-Grimley, Leif Johansson, Gordon Morrison, Milan Mashanovitch","doi":"10.1021/acsphotonics.4c01529","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01529","url":null,"abstract":"Differential absorption lidar (DIAL) systems are used for accurate vertical profiling and high precision columnar retrievals of molecular components of the atmosphere. Future space-based DIAL systems will enable global monitoring of species crucial to understanding weather and climate systems such as water vapor and methane. DIAL systems require dynamic, high-stability seed laser sources to provide accurate, sensitive measurements by tuning on and off molecular absorption lines. The NASA Langley Research Center is developing a seed laser system for DIAL detection of water vapor and methane based on a core photonic integrated circuit (PIC) subsystem including dual tunable lasers, amplifiers, modulators, photodiodes, and a passive splitter/combiner network on-chip. In this Article, we assemble a breadboard prototype of the seed laser source composed of a first generation PIC, a methane cell, a passive fiber network, and electronic controllers. The seed laser prototype’s performance is demonstrated in terms of PIC laser and modulator performance, online locking accuracy to a methane cell, rapid offset-locking accuracy for the DIAL measurement, and long-term stability. This initial demonstration achieves key performance metrics necessary for space-based DIAL measurements of water vapor and methane, providing a clear path toward a future space-grade system.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"3 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146264","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":"Controlled Synthesis of Bi2O2Te Nanosheets for High-Performance Broadband Photodetectors","authors":"Shijie Duan, Tiange Zhao, Xun Ge, Maohua Chen, Yuzhuo Bai, Yiye Yu, Shikun Duan, Yue Chen, Xingbo Shang, Longhai Zhu, Meng Yuan, Ziyi Fu, Zhen Wang, Jun Wang","doi":"10.1021/acsphotonics.5c00570","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00570","url":null,"abstract":"Broadband photodetectors, covering visible to infrared spectra, are widely used in communications, imaging, military, and the medical fields. Recently, low-dimensional material-based photodetectors have gained significant attention. Low-dimensional Bi₂O₂Se has been extensively studied for its excellent air stability and optical properties. Similarly, Bi₂O₂Te shares these advantages and has a narrower band gap of 0.13 eV. However, research on Bi₂O₂Te remains limited, likely due to its challenging synthesis conditions, which have impeded the study of its optoelectronic properties. In this study, we successfully synthesized large-scale (235 μm, the largest reported to date) Bi₂O₂Te nanosheets using an upside-down growth chemical vapor deposition method. Furthermore, the fabricated Bi₂O₂Te photodetector exhibits broadband photoresponse (520 nm-2 μm), an ultrahigh responsivity of 3679 A W^–1, an impressive detectivity of 8.91 × 10¹¹ cm Hz^1/2 W^–1, and a fast response time (τ_rise/τ_decay ≈ 32/92 μs), demonstrating its potential for applications in high-performance photodetectors. More importantly, this work provides a significant contribution to the further investigation of Bi₂O₂Te.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"23 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144133557","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":"Modulated Excitation Spectral Microscopy: Superior Unmixing and Multiplexed Imaging with Minimal Excitation Wavelengths","authors":"Zhipeng Zhang, Yi He, Jinhong Yan, Jiayi Liu, Ruirong Wang, Jun Fan, Kun Chen","doi":"10.1021/acsphotonics.5c00671","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00671","url":null,"abstract":"Excitation spectral microscopy enables multitarget imaging with high temporal resolution but is fundamentally constrained by a long-standing physical limitation: the number of imaging targets cannot exceed the number of excitation wavelengths due to the requirement for spectral unmixing. Here, we introduce modulated excitation spectral microscopy (MoExSM), which overcomes this constraint by modulating the excitation intensity of each wavelength in a specific ratio for each frame and decoupling the excitation and acquisition channels. MoExSM enables multiplexed imaging of up to five subcellular targets in fixed cells by using only three excitation wavelengths and a single, fixed fluorescence emission detection band, achieving minimal crosstalk. In live-cell imaging, it allows visualization of complex and dynamic interactions among four organelles, excited by three wavelengths. By breaking the physical limitation imposed by excitation wavelengths and simplifying the system design, MoExSM offers tremendous potential for visualizing complex cellular components with more colors.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"46 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130285","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":"Compendium of Natural Epsilon-Near-Zero Materials","authors":"Hamid Reza Darabian, Johann Toudert, Konstantin Y. Bliokh, Dorota Anna Pawlak","doi":"10.1021/acsphotonics.5c00199","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00199","url":null,"abstract":"Epsilon-near-zero (ENZ) materials are among the most intriguing electromagnetic materials, enabling the realization of electromagnetic field squeezing, wave steering, perfect absorption, and ultrafast optical switching. These phenomena arise from the strong interactions of light with substances with a near-zero real part of the permittivity and provide a new realm for fabricating optical and optoelectronic devices. However, ENZ materials are usually strongly dispersive, and their unique properties manifest only near certain optical wavelengths. Therefore, designing devices with targeted performance and operational wavelengths requires knowledge of the optical properties of a broad range of ENZ materials. Here, we present a comprehensive data set of natural materials, including metals, semiconductors, oxides, halides, and others, which exhibit intrinsic dielectric permittivity around zero. The data highlight the wavelength ranges over which the ENZ behavior occurs. Furthermore, we discuss application-specific quality factors and identify the most promising candidates for various applications across different spectral regions.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"44 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122453","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":"Photoluminescence Efficiency Droop in Perovskites","authors":"Pradeep R. Nair, Karthik Raitani","doi":"10.1021/acsphotonics.4c02492","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02492","url":null,"abstract":"The commercialization prospects of perovskite light-emitting diodes depend on their luminescence efficiency under large carrier densities. The decrease in luminescence efficiency under such high injection conditions could lead to an undesired increase in power consumption, with associated degradation and stability concerns. Here, through detailed modeling of thermal transport and carrier generation–recombination, we unravel the physical mechanisms that cause the luminescence to droop under high injection conditions. We show that self-heating leads to a reduction in radiative recombination (both bimolecular and excitonic). The resultant increase in nonradiative recombination and hence the thermal dissipation act as a positive feedback mechanism that leads to efficiency droop in perovskites. Our model predictions, well supported by experimental results, could be of broad interest toward the degradation-aware thermal design of perovskite optoelectronics and stability.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"80 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114469","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":"A Micro/Nano-Integrated Polarization Solar Compass: Solar Position and Geographical Position","authors":"Chuanlong Guan, Jinkui Chu, Yuanyu Ji, Jinshan Li, Ran Zhang","doi":"10.1021/acsphotonics.5c00211","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00211","url":null,"abstract":"Insects with polarization-sensitive vision could utilize the polarized skylight as an orientation or navigation reference. Based on the bionic perception strategy of atmospheric polarization patterns and by combining skylight polarization navigation with celestial navigation, a micro/nano-integrated polarization solar compass was proposed to achieve solar position and geographical position measurement. The micropolarizer arrays consisting of meta-nanogratings, as polarization-sensitive components, were fabricated and integrated onto an image sensor by ultraviolet nanoimprint lithography (UV-NIL). A field-programmable gate array (FPGA) was used as the processor to capture, demodulate, and process the polarization image in real time. The position measurement was achieved by perceiving the orientation of polarized skylight (<i>E</i>-vector) from two independent sky regions, and it determined solar and geographical positions in slightly cloudy sky with a mean absolute error of 0.22 degrees in solar elevation, 0.35 degrees in solar azimuth, 0.49 degrees in longitude (54.55 km), and 0.98 degrees in latitude (83.3 km). The proposed micro/nano-integrated polarization solar compass with an overall size of 57 × 45 × 94 mm and a weight of 230 g (with lenses) is highly integrated, compact, and suitable for portable devices.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"1 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114471","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":"Adaptive Filtering and Sequence Estimation for High-Precision Single-Photon 3D Imaging","authors":"Zihao Pei, Haitao Guan, Bowen Wang, Sheng Li, Min Zeng, Qian Chen, Chao Zuo","doi":"10.1021/acsphotonics.4c02453","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02453","url":null,"abstract":"Single-photon imaging offers a powerful computational approach for high-precision depth reconstruction with high photon efficiency. However, its accuracy is fundamentally limited by time-of-flight (TOF) misestimations stemming from system jitter, background noise, and detector dead time, which may collectively introduce significant depth measurement errors. Here, we present an advanced single-photon imaging technique that combines photon sequence estimation with adaptive Gaussian filtering to overcome these limitations. Coates’s estimator is first employed to suppress photon pile-up effects and accurately reconstruct the incident photon sequence. Subsequently, a Markov chain-based adaptive Gaussian filtering algorithm is applied to correct peak shifts in the reconstructed photon histogram. Experimental validation demonstrates that the proposed method achieves millimeter-level depth resolution (∼2–3 mm) across a measurement range of 6.5 m. Compared with other reconstruction methods, our approach delivers over 50% improvement in reconstruction accuracy, establishing it as a versatile solution for high-precision three-dimensional (3D) imaging in robotics, medical diagnostics, and remote sensing.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"18 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122454","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":"Announcing the 2026 ACS Photonics Young Investigator Lectureship Award Winner","authors":"Romain Quidant","doi":"10.1021/acsphotonics.5c00919","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00919","url":null,"abstract":"The landscape of photonics, where light and matter intertwine to shape technological innovation, continues to be illuminated by the groundbreaking contributions of exceptional researchers. Today, &lt;i&gt;ACS Photonics&lt;/i&gt; is thrilled to announce the recipient of the prestigious 2026 ACS Photonics Lectureship: Professor Mikhail Kats from the University of Wisconsin-Madison (USA). Within the first decade of his independent researcher career, Professor Kats has already etched an indelible mark on the field photonics. His trajectory, beginning with transformative doctoral work on optical metasurfaces, ultrathin film absorbers, and plasmonics, has blossomed into an independent research program characterized by profound insights and innovative device concepts. His current explorations into thermal-radiation engineering, tunable optics with phase-transition materials, anisotropic optical materials, and photonic components for quantum technologies perfectly embody the interdisciplinary spirit that lies at the heart of &lt;i&gt;ACS Photonics&lt;/i&gt;. Professor Kats seamlessly bridges the fundamental principles of physics, the ingenuity of materials science, and the practicalities of engineering to not only unveil novel optical phenomena, but also forge new functional devices.&lt;img alt=\"\" src=\"/cms/10.1021/acsphotonics.5c00919/asset/images/medium/ph5c00919_0001.gif\"/&gt; Professor Kats’s contributions have challenged conventional wisdom and opened new avenues of exploration. His group’s demonstration of the first temperature-independent thermal radiator – a seemingly paradoxical achievement with profound implications for infrared camouflage – stands as a testament to his innovative thinking. Furthermore, the development of “Planck spectroscopy”, a minimalist yet powerful spectroscopic technique, showcases his ability to derive elegant solutions to complex problems. His pioneering work on the nanosecond-scale modulation of thermal emission has unlocked exciting possibilities for ultrafast mid-infrared sources, while his elucidation of super-Planckian emission has clarified fundamental concepts in thermodynamics and defined the inherent limits of heat-powered radiation. These contributions have fundamentally reshaped our understanding of thermal emission and its potential applications. In the realm of nanophotonics and metasurfaces, Professor Kats built a strong foundation during his Ph.D., notably in the development of optical metasurfaces based on plasmonic antennas under the guidance of Professor Federico Capasso. Building on this, his independent contributions, particularly in the integration of phase-transition materials into active thin-film and metasurface devices, have been truly significant. His publications in &lt;i&gt;ACS Photonics&lt;/i&gt; on wavelength-by-wavelength temperature-independent thermal radiation utilizing insulator–metal transitions (2022) (1) and the inverse design of metasurfaces (2021) (2) exemplify his group’s inventive strategies for manipulating light–matte","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"8 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144104003","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":"Announcing the 2026 ACS Photonics Young Investigator Lectureship Award Winner","authors":"Romain Quidant,&nbsp;","doi":"10.1021/acsphotonics.5c0091910.1021/acsphotonics.5c00919","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00919https://doi.org/10.1021/acsphotonics.5c00919","url":null,"abstract":"","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 5","pages":"2260–2261 2260–2261"},"PeriodicalIF":6.5,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144097876","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":"Control of Stimulated Emission of Tin Perovskites through Polymeric Diffractive Gratings","authors":"Juan P. Martínez-Pastor, Jesús Sánchez-Díaz, José M. Villalvilla, Sandra Soriano-Díaz, José A. Quintana, Iván Mora-Seró, María A. Díaz-García, Isaac Suárez","doi":"10.1021/acsphotonics.5c00471","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00471","url":null,"abstract":"FASnI₃ (FA: formamidinium) polycrystalline perovskite thin films have demonstrated to be an excellent gain media and less toxic alternative to the Pb-containing perovskite light emitters. However, the instability of Sn perovskites prevents the postprocessing of the film after deposition, making its integration in two-dimensional optical architectures challenging. In this article, FASnI₃ polycrystalline thin films are successfully integrated with polymeric diffractive gratings under cost-effective and industrial compatible technology. The gratings are fabricated under holographic techniques, allowing patterning on large areas (≈1 cm²) and the posterior deposition of the perovskite films or cladding layers. The grating period demonstrated to be an adequate tuning parameter to control the amplified spontaneous emission (ASE) properties. Notably, the overlap of the mode with the emission band represents a suitable mechanism to selectively enhance the generation of the ASE (tuned device) above a moderate threshold of 100 μJ/cm² and extract the random lasing lines created on the grains of the film (detuned device). These results represent a significant advance on Sn-perovskite-based optical sources, offering cost-effective technology for next-generation photonic applications.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"42 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114472","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}