Laser & Photonics Reviews最新文献

{"title":"Repetition-Rate and Wavelength Flexible Femtosecond Laser Pulse Generation","authors":"Zhi Cheng,&nbsp;Jiaqi Zhou,&nbsp;Xinru Cao,&nbsp;Shuzhen Cui,&nbsp;Huawei Jiang,&nbsp;Yan Feng","doi":"10.1002/lpor.202400788","DOIUrl":"10.1002/lpor.202400788","url":null,"abstract":"<p>Compared to mode-locked oscillators, gain-switched diodes (GSD) have the key advantage of repetition-rate agility. Yet, large pulse duration and poor coherence of the GSD pulses greatly limit their applications. Here, a GSD-pumped Raman fiber amplifier is demonstrated, which can effectively generate femtosecond laser pulses with both repetition-rate and wavelength agility. It is proved that both nonlinear optical gain and single-frequency seed in the fiber amplifier play critical roles for improving the coherence of the generated laser pulses. In the experimental demonstration, pumped by 1065 nm GSD pulses, the nonlinear fiber amplifier can generate highly coherent 1121 nm femtosecond Raman pulses with up to 80.2% conversion efficiency. The Raman pulses can maintain high performance within the repetition-rate tuning range from 1 to 150 MHz. The potential for generating 1178 nm femtosecond Raman pulses is also demonstrated with an optical conversion efficiency of 63.8%. This all-fiber based femtosecond laser with both repetition-rate and wavelength agility is a promising light source for applications such as nonlinear microscopy and micromachining.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141986690","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":"Efficient Rational Approximation of Optical Response Functions with the AAA Algorithm","authors":"Fridtjof Betz,&nbsp;Martin Hammerschmidt,&nbsp;Lin Zschiedrich,&nbsp;Sven Burger,&nbsp;Felix Binkowski","doi":"10.1002/lpor.202400584","DOIUrl":"10.1002/lpor.202400584","url":null,"abstract":"<p>A theoretical framework for the rational approximation of optical response functions in resonant photonic systems is introduced. The framework is based on the AAA algorithm and further allows to solve the underlying nonlinear eigenproblems and to efficiently model sensitivities. An adaptive sampling strategy exploits the predominance of resonances in the physical response. A chiral metasurface is investigated and it is shown that the chiroptical response on parameter variations can be accurately modeled in the vicinity of the relevant resonance frequencies.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lpor.202400584","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141858003","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":"Ultracompact 3D Splitter for Single-Core to Multi-Core Optical Fiber Connections Fabricated Through Direct Laser Writing in Polymer","authors":"Tigran Baghdasaryan,&nbsp;Koen Vanmol,&nbsp;Hugo Thienpont,&nbsp;Francis Berghmans,&nbsp;Jürgen Van Erps","doi":"10.1002/lpor.202400089","DOIUrl":"10.1002/lpor.202400089","url":null,"abstract":"<p>The deployment and advancement of high-bandwidth communication networks, quantum information systems, and sensing platforms relying on multi-core optical fibers (MCFs) are challenged by the scarcity of cost-effective, compact, and efficient optical interfacing components. This study introduces an unprecedented 3D-printed 1 × 4 splitter for MCFs fabricated with 2-photon polymerization-based direct laser writing. The pivotal element is a triangular cross-section 3D multimode interference (MMI) coupler, supplemented with S-bends and adiabatic tapers to facilitate the splitting of a signal from a single core of a single-mode fiber into four cores of a multi-core fiber. All components are initially designed and assessed to minimize loss and polarization dependence across the C- and L-bands using optical simulation. Subsequently, a proof-of-concept model of the splitter, compactly integrated within the fiber volume, featuring a remarkably short length of 180 µm and insertion loss of ≈−3 dB, is fabricated. The manufacturing speed, minimal loss, component compactness, and flexibility of the approach, collectively present promising avenues for pioneering developments in MCF-coupling components.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lpor.202400089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141754300","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":"Metal Halide Perovskites Blue Emitters and Light-Emitting Diodes: A Review on Morphological and Molecular Dimensions","authors":"Long Gao,&nbsp;Yuyan Gong,&nbsp;Xiaoyu Zhang,&nbsp;Hin-Lap Yip,&nbsp;Liang Shen,&nbsp;Jiaqi Zhang","doi":"10.1002/lpor.202301100","DOIUrl":"10.1002/lpor.202301100","url":null,"abstract":"<p>Metal halide perovskites have recently garnered significant attention as a fundamental emitter due to their high carrier mobility, strong light absorption, high monochromaticity, and tunable emission bandgap. However, the brightness, efficiency, and stability issues have limited their potential applications in blue region. To break through these limitations, researchers have investigated different dimensions of perovskites to seek an excellent emitter. To date, the quantum confinement and coordination octahedron monomer arrangement perovskites still lack of systematic cognition. In this review, the molecular and morphological dimensions of blue perovskite emitters are summarized. The differences and relationships between these dimensions in terms of their fabrication and properties are also explored. Furthermore, recent advances in blue light enhancement strategies to address the challenges in various morphological and molecular structures are highlighted. Finally, the main challenges and future directions are discussed for the development of perovskite blue LEDs.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141726083","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":"p-Orbital Higher-Order Topological Corner States in 2D Photonic Su–Schrieffer–Heeger Lattices","authors":"Domenico Bongiovanni,&nbsp;Zhichan Hu,&nbsp;Ziteng Wang,&nbsp;Xiangdong Wang,&nbsp;Dario Jukić,&nbsp;Yi Hu,&nbsp;Daohong Song,&nbsp;Roberto Morandotti,&nbsp;Zhigang Chen,&nbsp;Hrvoje Buljan","doi":"10.1002/lpor.202400638","DOIUrl":"10.1002/lpor.202400638","url":null,"abstract":"<p>Higher-order topological insulators (HOTIs) have attracted much attention in photonics partly because of the robust and highly confined corner modes they support. The growing availability of synthetic multi-orbital platforms has recently stimulated research focus on the interplay between HOTIs and orbital degree of freedom. In this work, the topological properties of the two-dimensional (2D) Su–Schrieffer–Heeger (SSH) model with <span></span><math>\u0000 <semantics>\u0000 <mi>p</mi>\u0000 <annotation>$p$</annotation>\u0000 </semantics></math>-orbital degree of freedom are explored and <span></span><math>\u0000 <semantics>\u0000 <mi>p</mi>\u0000 <annotation>$p$</annotation>\u0000 </semantics></math>-orbital topological corner states in a laser-written photonic 2D SSH lattice are experimentally observed. It is shown that the <span></span><math>\u0000 <semantics>\u0000 <mi>p</mi>\u0000 <annotation>$p$</annotation>\u0000 </semantics></math>-band 2D SSH model is a HOTI, where zero-energy orbital corner states appear either as in-gap states or as bound states in the continuum (BICs). Chiral symmetry is sufficient for topological protection of the in-gap <span></span><math>\u0000 <semantics>\u0000 <mi>p</mi>\u0000 <annotation>$p$</annotation>\u0000 </semantics></math>-orbital corner states, but not for their BIC counterparts because of the hybridization effect within the bulk continuum. The multipole chiral number is employed as an optimal topological invariant to characterize the <span></span><math>\u0000 <semantics>\u0000 <mi>p</mi>\u0000 <annotation>$p$</annotation>\u0000 </semantics></math>-orbital HOTIs. The flexibility of tuning the orbital couplings offers an extra degree of manipulation for the BICs, which may be useful for the development of novel photonic devices.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597505","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":"Generation of Arbitrarily Programmable Vector Vortex Beams Based on Spin-Independent Metasurface","authors":"Yue Gou,&nbsp;Han Wei Tian,&nbsp;Zheng Xing Wang,&nbsp;Tai Yi Zhang,&nbsp;Shi Sun,&nbsp;Sen Zheng,&nbsp;Tie Jun Cui,&nbsp;Hui Feng Ma","doi":"10.1002/lpor.202400700","DOIUrl":"10.1002/lpor.202400700","url":null,"abstract":"<p>Vectorial structured beam, which possesses diverse inhomogeneous spatial field distributions, has been developed into an advanced technology for particle trapping, optical communication, and quantum information. However, most of the related studies are based on static devices that can only generate structured light with fixed field distributions. To break through this restriction, the study proposes and experimentally demonstrates a reflection-type spin-independent programmable metasurface (SIPM) that can generate arbitrary vector vortex beams (VVBs) dynamically in microwave frequencies. By controlling the working states of loaded positive-intrinsic-negative (PIN) diodes, the metasurface can realize real-time and spin-independent manipulations of amplitude and phase of the reflected waves. Therefore, any desired VVBs can be achieved by dynamically controlling the superimposition of left- and right-handed reflected circularly polarized vortexes. The proposed SIPM exhibits powerful abilities in modulating the vectorial structured beams in the microwave band, and may bring potential technological innovations for the future spintronics, imaging display, optical computing, and wireless communications.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141597503","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":"Achieving High Quantum Efficiency in Mn5+ Activated Phosphors for NIR-II Deep Bioimaging Application","authors":"Quan Zhang,&nbsp;Zetian Yang,&nbsp;Xinquan Zhou,&nbsp;Maxime Delaey,&nbsp;Mingyuan Wang,&nbsp;Ruining Fu,&nbsp;Shuangying Lei,&nbsp;Henk Vrielinck,&nbsp;Dirk Poelman","doi":"10.1002/lpor.202400781","DOIUrl":"10.1002/lpor.202400781","url":null,"abstract":"<p>Mn⁵⁺ emission is a promising candidate for imaging deep tissue structures (e.g., vessels, tumors) in the second near-infrared (NIR-II, 1000–1350 nm) region. However, its practical application is impeded by the limited quantum efficiency of the available phosphors due to the unstable valence state of Mn⁵⁺. Herein, a novel strategy involving site competition is proposed to stabilize the Mn⁵⁺ state by the introduction of valence-unstable Bi^2+/3+. The results demonstrate that Bi³⁺ ions tend to occupy two different Ca²⁺ ion sites within the Ca₆Ba(PO₄)₄O lattice. The incorporation of a small amount of Bi³⁺ effectively suppresses the amount of Mn²⁺ in Ca²⁺ sites. This is also confirmed by spectroscopic experiments and density function theory calculations. Notably, an ultra-high internal quantum efficiency of 82.3% is achieved under excitation at 653 nm, surpassing more than twofold the previously reported value of 37.5% in Ca₆Ba(PO₄)₄O: Mn⁵⁺. As a proof of concept, deep tissue imaging with a penetration depth of ≈2.8 cm is achieved using a self-produced NIR-II light-emitting diodes device embedded with Ca₆Ba(PO₄)₄O: 0.003Mn⁵⁺/0.003Bi³⁺ powder. These findings provide valuable insights into improving the luminescent properties associated with Mn⁵⁺ ions and pave the way for deep tissue imaging with high spatiotemporal resolution.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588732","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":"Light-Guided Genetic Scissors Based on Phosphorene Quantum Dot","authors":"Zhi Chen,&nbsp;Hao Huang,&nbsp;Jiefeng Deng,&nbsp;Changle Meng,&nbsp;Yule Zhang,&nbsp;Taojian Fan,&nbsp;Lude Wang,&nbsp;Shuo Sun,&nbsp;Yi Liu,&nbsp;Huiling Lin,&nbsp;Shuang Li,&nbsp;Yunpeng Bai,&nbsp;Lingfeng Gao,&nbsp;Junle Qu,&nbsp;Dianyuan Fan,&nbsp;Xueji Zhang,&nbsp;Han Zhang","doi":"10.1002/lpor.202400777","DOIUrl":"10.1002/lpor.202400777","url":null,"abstract":"<p>Genetic engineering faces persistent challenges in achieving precise Deoxyribonucleic acid (DNA) cleavage, especially with the limitations associated with current enzyme-based methods, exemplified by issues in CRISPR technologies. This study introduces a groundbreaking approach: utilizing reactive oxygen species (ROS) generated by Multiphoton Absorption (MPA)-excited Black Phosphorus Quantum Dots (BPQDs) under femto-second laser irradiation. This innovative method not only allows excitation with lower energy but also enhances overall efficiency. The integration of complementary RNA sequences facilitates high-efficiency, site-selective DNA cleavage in the system, named “TADPOLE” (Targeted DNA Precision Oriented Laser Excision). Beyond its precision in targeting arbitrary DNA sequences using quantum dots, TADPOLE harnesses the unique multiphoton absorption property of BPQDs, enabling excitation with lower-energy light sources suitable for in vivo applications in the future. Moreover, the approach integrates guiding RNA and ultrafast laser technology to provide precise control over local ROS generation and minimal heat production. This guarantees site-specific DNA cleavage while mitigating the risk of damage to non-targeted sequences. In summary, this study catalyzes advancements in enzyme-free DNA cleavage technologies, with transformative implications for genetic engineering, biotechnology, and medicine. The holistic precision, versatility, and endurance presented by TADPOLE open new avenues for targeted gene therapies and transformative applications in related fields.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141584384","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":"Tip-Enhanced Imaging and Control of Infrared Strong Light-Matter Interaction","authors":"Yueying Wang,&nbsp;Samuel C. Johnson,&nbsp;Nishant Nookala,&nbsp;John F. Klem,&nbsp;Samuel R. Turner,&nbsp;Richard L. Puro,&nbsp;Min Hu,&nbsp;Igal Brener,&nbsp;Eric A. Muller,&nbsp;Alexey Belyanin,&nbsp;Mikhail A. Belkin,&nbsp;Markus B. Raschke","doi":"10.1002/lpor.202301148","DOIUrl":"10.1002/lpor.202301148","url":null,"abstract":"<p>Optical antenna resonators enable control of light-matter interactions on the nano-scale via electron–photon hybrid states in strong coupling. Specifically, mid-infrared (MIR) nano-antennas coupled to saturable intersubband transitions in multi-quantum-well (MQW) semiconductor heterostructures allow for the coupling strength to be tuned through antenna resonance and field intensity. Here, tip-enhanced nano-scale variation of antenna-MQW coupling across the antenna is demonstrated, with a spatially-dependent coupling strength <span></span><math>\u0000 <semantics>\u0000 <msub>\u0000 <mi>g</mi>\u0000 <mi>aq</mi>\u0000 </msub>\u0000 <annotation>$g_{rm aq}$</annotation>\u0000 </semantics></math> varying from 73 (strong coupling) to 24 <span></span><math>\u0000 <semantics>\u0000 <msup>\u0000 <mi>cm</mi>\u0000 <mrow>\u0000 <mo>−</mo>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 </msup>\u0000 <annotation>$rm {cm}^{-1}$</annotation>\u0000 </semantics></math> (weak coupling). This behavior is modeled based on the spatially dependent local constructive and destructive interference between tip and antenna fields. Using a quantum-mechanical density-matrix model of the MQW system with its designed values of transition dipole moment, doping density, and population decay time, the picosecond IR pulse coupling to intersubband transitions and the associated tip induced strong-field saturation effects are described. These results present a new regime of nonlinear IR light-matter control based on the dynamic manipulation of quantum hybrid states on the nanoscale and in the infrared, with a perspective regarding extension to molecular vibrations.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141584289","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":"Photon-Counting 3D Velocimetry Empowered by OAM-Based Multi-Point Doppler Effect","authors":"Yanxiang Zhang,&nbsp;Zijing Zhang,&nbsp;Zhongquan Nie,&nbsp;Qingfeng Wang,&nbsp;Baohua Jia","doi":"10.1002/lpor.202400210","DOIUrl":"10.1002/lpor.202400210","url":null,"abstract":"<p>Velocimetry of a motion target within 3-D space is highly desirable in numerous applicable realms, ranging from explosion and shock wave physics, aerospace engineering to astronomical surveys. However, it is challenging to achieve synchronous, real-time, and photon-counting 3-D velocimetry in modern frameworks as they either require separate multi-directional detections, and cumbersome calculation processes or are confined to achieve in situ measurements. Here, a new conceptual paradigm is proposed to circumvent these constraints using orbital-angular-momentum (OAM)-driven multi-point Doppler effect at the photon-counting level. This scheme, emanating from a single-direction launch of an on-demand engineered sequence OAM light mode onto a motion surface, enables simultaneous and independent detections of time-varying Doppler photon-count events from three orthogonal echo light paths. Concretely, at the range of motion velocity of 0.25–0.5 ms⁻¹, the relative measurement errors of this proof-of-principle prototype are below 1.5%, thus achieving high-accuracy 3-D velocimetry at the photon-counting level for the first time. The exploration of the OAM-photon-counting 3-D velocimetry techniques provides unprecedented advantages in potential applications of synchronous, real-time, high-efficiency, and long-range quantum lidar.</p>","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"18 11","pages":""},"PeriodicalIF":9.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lpor.202400210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141584382","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}