Chenhui Yu, Guanyi Zhu, Mingliang Xu, Fei He, Liwei Song, Ye Tian, Yuxin Leng, Ruxin Li
{"title":"Full-Span Reversible Space-Time Birefringence","authors":"Chenhui Yu, Guanyi Zhu, Mingliang Xu, Fei He, Liwei Song, Ye Tian, Yuxin Leng, Ruxin Li","doi":"10.1002/lpor.202503213","DOIUrl":"10.1002/lpor.202503213","url":null,"abstract":"<div>\u0000 \u0000 <p>Birefringence, the polarization-dependent splitting of light in anisotropic crystals, enables diverse optical phenomena and advanced functionalities such as optical communication, nonlinear optics, and quantum optics. However, conventional methods for controlling birefringence typically rely on engineering the optical crystal structure or applying external stimuli such as electric fields, mechanical stress, or thermal variations, which are often constrained by limited tunability, challenges in integration with compact photonic devices, or slow response time. Here, we introduce a new degree of freedom to manipulate the birefringence of light propagation in optical crystals through programming the spatiotemporal spectral phase of the incident light wave. We demonstrate that this approach achieves continuous tuning of birefringence across a spectrum more than 100 times broader than that achievable with conventional birefringence tuning, spanning from positive through zero to negative values, irrespective of the crystal's optical sign and without inherent physical limitations. This unique optical behavior provides a versatile platform for investigating the complex dynamics of wave flow in anisotropic media, while the broad tunability of this space-time birefringence will spur innovations in ultrafast optical manipulation, optical computation, and quantum information processing—applications that demand rapid and flexible device reconfiguration.</p>\u0000 </div>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 19","pages":""},"PeriodicalIF":9.7,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147649257","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":"Correction to “Single-Exposure High-Dynamic-Range 3D Measurement via Multi-Polarization Imaging and Physics-Informed Zero-Shot Learning”","authors":"","doi":"10.1002/lpor.71846","DOIUrl":"10.1002/lpor.71846","url":null,"abstract":"<p>F Li, Q Zhang, Y Wang. Single-Exposure High-Dynamic-Range 3D Measurement via Multi-Polarization Imaging and Physics-Informed Zero-Shot Learning. Laser & Photonics Rev., e01071 (2025). https://doi.org/10.1002/lpor.202501071</p><p>We apologize for this error.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 19","pages":""},"PeriodicalIF":9.7,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lpor.71846","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chenhui Yu, Guanyi Zhu, Mingliang Xu, Fei He, Liwei Song, Ye Tian, Yuxin Leng, Ruxin Li
{"title":"Full-Span Reversible Space-Time Birefringence (Laser Photonics Rev. 20(19)/2026)","authors":"Chenhui Yu, Guanyi Zhu, Mingliang Xu, Fei He, Liwei Song, Ye Tian, Yuxin Leng, Ruxin Li","doi":"10.1002/lpor.71839","DOIUrl":"10.1002/lpor.71839","url":null,"abstract":"<p><b>Reversible Space-Time Birefringence</b></p><p>Space-time birefringence is solely tuned by adjusting the spectral phase. The schematic depicts an invariant spectral projection and a distinct double light-cone formed when space-time light crosses the crystal interface. The film visualizes the resulting double-X-wave spatiotemporal profile. See Research Article e03213 by Fei He and co-workers for more details.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 19","pages":""},"PeriodicalIF":9.7,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lpor.71839","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Harnessing Metasurfaces for Advanced Optical Metrology","authors":"Hui Xu, Yingjie Gu, Meiyu Peng, Hairong He, Zhiquan Chen, Ruibo Jin, Xunwei Xu, Yu Chen, Guangtao Cao, Enduo Gao, Hui Yang, Hui Jing","doi":"10.1002/lpor.71543","DOIUrl":"10.1002/lpor.71543","url":null,"abstract":"<div>\u0000 \u0000 <p>Optical metrology has played a crucial role in the advancement of science and technology. In optical metrology, the fundamental properties of light are skillfully employed as information carriers, enabling accurate measurement of numerous physical quantities. However, conventional optical metrology systems have typically involved a suite of different optical components, which make them bulky and difficult for chip-scale integration. Recently, the emerging metasurfaces have provided a revolutionary solution for powerful and integrated optical metrology, which showcase advantages well beyond conventional devices. Here, we review the latest cutting-edge in exciting field of metasurface-based metrology, ranging from classical to quantum realms. We describe in detail both the fundamental principles and typical metrology strategies for measuring different physical quantities, including wavelength, polarization, phase, displacement, and refractive index. Prominent examples of such technologies in presented applications such as optical imaging, photonic spectrometers, micro sensors and quantum interferometers have been thoroughly discussed. We also discuss and outlook the challenges and opportunities on this emerging field.</p>\u0000 </div>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 19","pages":""},"PeriodicalIF":9.7,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148674984","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}
Qing Peng, Hang Su, Zhiwei Ma, Xiangnan Pan, Gen Chen, Zeyu Huang, Hongyang Li, Jiale Li, Lihang Zheng, Linxian Li, Zishun Lu, Xintian Cai, Tangyang Pu, Zhongwei Hu, Qiang Cao, Sheng Liu
{"title":"Femtosecond Laser Etching for Microelectronic Chip Fabrication: Mechanisms, Applications, and Process Integration","authors":"Qing Peng, Hang Su, Zhiwei Ma, Xiangnan Pan, Gen Chen, Zeyu Huang, Hongyang Li, Jiale Li, Lihang Zheng, Linxian Li, Zishun Lu, Xintian Cai, Tangyang Pu, Zhongwei Hu, Qiang Cao, Sheng Liu","doi":"10.1002/lpor.71549","DOIUrl":"10.1002/lpor.71549","url":null,"abstract":"<div>\u0000 \u0000 <p>Femtosecond laser etching has emerged as a powerful technique for high-precision microelectronic chip fabrication, offering ultrafast processing speeds, minimal thermal effects, and exceptional spatial resolution. This paper systematically reviews key etching mechanisms, including laser-induced backside wet/dry etching and hybrid additive-subtractive approaches, and their dependence on laser–material interaction parameters. Representative applications in silicon micromachining, conductive path formation, microstructure fabrication, and advanced packaging are discussed. Technological developments in laser sources, beam shaping, motion control, and in situ process monitoring are also examined in the context of precision and scalability. Critical challenges such as surface roughness, thermal accumulation, and material selectivity are addressed through recent advances in ultrafast pulse engineering, process optimization, and intelligent feedback systems. Finally, this review outlines prospects for femtosecond laser etching in heterogeneous integration, MEMS, and quantum photonic systems, highlighting its pivotal role in next-generation semiconductor manufacturing.</p>\u0000 </div>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 19","pages":""},"PeriodicalIF":9.7,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148564554","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}
Shuyuan Zhu, Laiyang Dang, Tao Ye, Tong Xia, Wenhao Zhu, Fu Liu, Yihuan Shi, Shengli Pan, He Zhao, Dongmei Huang, Xiuhong Wang, Pu Wang
{"title":"Tailored Supercontinuum Generation for Shot-Noise-Limited, Ultrahigh-Resolution Optical Coherence Tomography at 1.3 µm","authors":"Shuyuan Zhu, Laiyang Dang, Tao Ye, Tong Xia, Wenhao Zhu, Fu Liu, Yihuan Shi, Shengli Pan, He Zhao, Dongmei Huang, Xiuhong Wang, Pu Wang","doi":"10.1002/lpor.71374","DOIUrl":"https://doi.org/10.1002/lpor.71374","url":null,"abstract":"<div>\u0000 \u0000 <p>Achieving shot-noise-limited sensitivity in spectral-domain optical coherence tomography (SD-OCT) while attaining ultrahigh axial resolution with broadband sources remains challenging, as spectral broadening typically introduces excess noise. To overcome this limitation, we propose a tailored supercontinuum generation for a 1.3 µm ultra-flat, low-noise supercontinuum based on engineered nonlinear dynamics in an anomalous-dispersion highly nonlinear fiber pumped by a home-built 1.55-µm femtosecond laser. By harnessing self-phase modulation-driven soliton dynamics and phase-matched dispersive-wave generation, a smooth and reproducible spectral connection between the soliton band and the dispersive wave is achieved, yielding an exceptionally flat and broadband spectrum with near-unity coherence. The SC source provides a 3-dB bandwidth of 295.09 nm and a 10-dB bandwidth of 373.86 nm centered at 1300 nm. Variance-power analysis confirms excess noise below the shot-noise level in the dominant spectral region. Implemented in an SD-OCT system, the source achieves an axial resolution of 1.99 µm and a sensitivity of 102.02 dB. Imaging of multilayer tape and porcine myocardial tissue demonstrates enhanced contrast, resolution, and signal-to-noise ratio. This work reports the first realization of shot-noise-limited OCT with ultrahigh axial resolution, breaking the trade-off between bandwidth, spectral flatness, and noise.</p>\u0000 </div>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 19","pages":""},"PeriodicalIF":9.7,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149100742","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}
Zhibin Cheng,Yanxia Cui,Yanjie Shao,Wenhui Zhao,Rong Wen,Kaibo Zheng,Guohui Li
{"title":"Narrow‐Linewidth Continuous‐Wave Perovskite Nanolasers via Conformal DFB Gratings","authors":"Zhibin Cheng,Yanxia Cui,Yanjie Shao,Wenhui Zhao,Rong Wen,Kaibo Zheng,Guohui Li","doi":"10.1002/lpor.72002","DOIUrl":"https://doi.org/10.1002/lpor.72002","url":null,"abstract":"ABSTRACT Integrating solution‐processed perovskite gain media into silicon photonic platforms is challenging because of the competition between precursor infiltration and crystallization. Here, by tuning the solvent extraction rate via controlled antisolvent volume, we synchronize the precursor infiltration and crystallization kinetics on DFB gratings, enabling complete trench filling and uniform conformal growth with few structural defects. This structural continuity supports stable Bragg feedback, yielding wavelength‐tunable lasing (543–554 nm, 2 nm step). Under pulsed pumping, the laser has a linewidth of 0.15 nm and a threshold of 15.8 µJ cm − 2 (Q ≈ 3600). Room‐temperature continuous‐wave lasing is also demonstrated with a threshold of 15 W cm − 2 (Q ≈ 1700). This solvent‐extraction‐controlled crystallization strategy provides a general path to determining the morphology of solution‐processed semiconductors directly on nanostructured substrates for on‐chip coherent light sources.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"405 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089854","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}
Lu Li, Wei-Wen Fan, Xiao-Yi Xu, Chun-Ting Xu, Yong Zhang, Wei Hu
{"title":"Polychromatic Circularly Polarized Luminescence Enhanced Multi-Dimensional Encryption","authors":"Lu Li, Wei-Wen Fan, Xiao-Yi Xu, Chun-Ting Xu, Yong Zhang, Wei Hu","doi":"10.1002/lpor.71287","DOIUrl":"https://doi.org/10.1002/lpor.71287","url":null,"abstract":"<div>\u0000 \u0000 <p>Optical encryption exploits the high-dimensionality of light for physical-layer security, offering inherent resistance to algorithmic attacks and a powerful alternative to electronic methods. To meet growing demands in secure logistics, anti-counterfeiting, and hardware authentication, a dynamic platform for multiple optical parameter control is essential to fully harness light's potential for advanced encryption. Here, we demonstrate such a platform using a thermally tuned, luminophore-doped chiral photonic crystal. This medium provides dynamic, reversible selectivity in both wavelength and circular polarization, governed by the match between the photonic bandgap and the fluorescence peak: a match yields strong circularly polarized luminescence with a high dissymmetry factor (g<sub>lum</sub>), while a mismatch results reduced g<sub>lum</sub>. Further, geometric phase modulation allows arbitrary holograms to be encoded into the cholesteric liquid crystal alignment, and laser direct writing (LDW) enables customizable amplitude patterns. We integrate the polarization, wavelength, phase, and amplitude dimensions into a single encryption scheme. The decryption key is embedded within the hologram. Only the correct thermal and illumination keys yield a unique amplitude, spin, and fluorescence combination, further compressed into a single binary code. This work establishes a versatile strategy for high-dimensional optical encryption, significantly upgrading the security frontier for information and privacy protection.</p>\u0000 </div>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 19","pages":""},"PeriodicalIF":9.7,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149100234","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}