Nanophotonics最新文献_第3页

Collective multimode strong coupling in plasmonic nanocavities 等离子纳米腔中的集体多模强耦合

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-20 DOI: 10.1515/nanoph-2024-0618

Angus Crookes, Ben Yuen, Angela Demetriadou

引用次数: 0

On-chip manipulation of trion drift in suspended WS2 monolayer at room temperature

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-20 DOI: 10.1515/nanoph-2024-0739

Woo Hun Choi, Seong Won Lee, Su-Hyun Gong

{"title":"On-chip manipulation of trion drift in suspended WS2 monolayer at room temperature","authors":"Woo Hun Choi, Seong Won Lee, Su-Hyun Gong","doi":"10.1515/nanoph-2024-0739","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0739","url":null,"abstract":"Excitons, which are bound states of electrons and holes, in transition metal dichalcogenides (TMDCs) have been studied as an information carrier for realizing new types of optoelectronic devices. However, the charge neutrality of excitons inhibits the electric control of their motion, as seen in conventional electronic devices, except when utilizing a heterostructure. Here, we investigated the drift motion of trions, quasiparticles composed of an exciton bound to an excess charge, at room temperature in a suspended WS2 monolayer by applying a gate-tunable electric field. Using a simple bottom-gate device, we can tune the electric field intensity and exciton-to-trion conversion ratio by increasing the charge density in the monolayer. Consequently, we experimentally observed that locally excited trions drift toward the center of the suspended monolayer. To understand the underlying mechanisms, we numerically simulated the trion drift using the drift-diffusion equation, accounting for the contributions from both the electric field and strain. The results confirmed that the electric field plays the dominant role in the drift phenomena. Our work offers a useful platform for realizing trion-based optoelectronic devices that are capable of operating even at room temperature.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"183 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143661281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Flat nonlinear optics with intersubband polaritonic metasurfaces

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-20 DOI: 10.1515/nanoph-2024-0742

Jonas H. Krakofsky, Raktim Sarma, Igal Brener, Andrea Alù, Jongwon Lee, Mikhail A. Belkin

{"title":"Flat nonlinear optics with intersubband polaritonic metasurfaces","authors":"Jonas H. Krakofsky, Raktim Sarma, Igal Brener, Andrea Alù, Jongwon Lee, Mikhail A. Belkin","doi":"10.1515/nanoph-2024-0742","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0742","url":null,"abstract":"Nonlinear intersubband polaritonic metasurfaces produce some of the strongest second- and third-order nonlinear optical responses reported for condensed matter systems at infrared frequencies. These metasurfaces are fabricated as two-dimensional arrays of nanoresonators from multi-quantum-well semiconductor heterostructures, designed to produce strong nonlinear responses associated with intersubband transitions. By optimally coupling the optical modes of the nanoresonators to vertically polarized intersubband transitions in semiconductor heterostructures, one can boost the nonlinear response associated with intersubband transitions, make intersubband transitions interact with free-space radiation at normal incidence, and hence produce optically thin flat nonlinear optical elements compatible with free-space optical setups. As a result of the strong nonlinear response in these systems, significant nonlinear conversion efficiencies (>0.1 %) can be attained in deeply subwavelength optical films using modest pumping intensities of only 10–100 kW/cm2. Subwavelength metasurface thickness relaxes phase-matching constraints limiting the operation of bulk nonlinear crystals. Furthermore, the amplitude and phase of the nonlinear optical response in intersubband polaritonic metasurfaces can be tailored for a specific pump wavelength and a nonlinear process of interest through the co-optimization of quantum engineering of electron states in semiconductor heterostructures and photonic engineering of the metasurface nanoresonators design. Additionally, an applied voltage can dynamically control the amplitude and phase of the nonlinear optical response at a nanoresonator level. Here, we review the current state of the art in this rapidly expanding field, focusing on nonlinear processes supporting second-harmonic generation, saturable absorption, and optical power limiting.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"93 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Spatio-spectral localized modal coupling for room-temperature quantum coherence protection

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-20 DOI: 10.1515/nanoph-2024-0574

Wen-Jie Zhou, Yu-Wei Lu, Jing-Feng Liu, Renming Liu, Lay Kee Ang, Ortwin Hess, Lin Wu

引用次数: 0

Second harmonic generation of optical spin−orbit interactions in hybrid plasmonic nanocircuits

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-19 DOI: 10.1515/nanoph-2024-0725

Junjun Shi, Kangcheng Jing, Li Li, Wenjun Zhang, Tianzhu Zhang, Xiaobo He

引用次数: 0

Enhancing radiative heat transfer with meta-atomic displacement

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-19 DOI: 10.1515/nanoph-2024-0729

Cheng-Long Zhou, Shuihua Yang, Yang Huang, Yong Zhang, Hong-Liang Yi, Mauro Antezza, Cheng-Wei Qiu

引用次数: 0

Optical phased array receiver with mode diversity and coherent combination

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-18 DOI: 10.1515/nanoph-2025-0038

Enge Zhang, Lei Zhang

{"title":"Optical phased array receiver with mode diversity and coherent combination","authors":"Enge Zhang, Lei Zhang","doi":"10.1515/nanoph-2025-0038","DOIUrl":"https://doi.org/10.1515/nanoph-2025-0038","url":null,"abstract":"Optical phased arrays (OPAs) hold significant promise for low-cost, solid-state beam steering in LiDAR and free-space optical (FSO) communications. The field of view (FOV) is one of the key performance metrics in OPA for both optical beam transmitting (Tx) and receiving (Rx). Currently, people tend to use the same design for both the Tx and Rx parts under the hypothesis of reciprocity. In fact, Tx antennas typically generate well-controlled near-field profiles, whereas Rx apertures encounter randomly distributed incident waves due to uncontrolled reflection and propagation. This work demonstrates that leveraging mode diversity can effectively expand the FOV and enhance the receiving efficiency of Rx OPAs, irrespective of the antenna type. To efficiently utilize collected photons for coherent detection in LiDAR and FSO systems, we introduce an inversely designed mode splitter-converter and a coherent combination architecture. Unlike traditional methods, our approach effectively handles beams with varying amplitudes. As proof of concept, we designed and fabricated an 8-channel edge-emitting OPA receiver operating in TE0 and TE1 modes, employing a sparse array to suppress grating lobes within the ±90° range. Experimental results reveal an FOV of 133° for our multimode receiver, surpassing the 49° FOV of a single-mode counterpart with the same antenna array. Our approach, encompassing both mode diversity and coherent combination, introduces a new degree of freedom – higher-order spatial modes – with the potential to significantly advance OPA receiver design.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"4661 3 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Localization of nanoscale objects with light singularities

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-18 DOI: 10.1515/nanoph-2024-0639

Thomas A. Grant, Anton N. Vetlugin, Eric Plum, Kevin F. MacDonald, Nikolay I. Zheludev

引用次数: 0

Dielectric metasurfaces based on a phase singularity in the region of high reflectance

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-18 DOI: 10.1515/nanoph-2024-0700

Jaewon Jang, Minsu Park, Hyeonjeong Kang, Gyu-Won Han, Hui Jae Cho, Yeonsang Park

{"title":"Dielectric metasurfaces based on a phase singularity in the region of high reflectance","authors":"Jaewon Jang, Minsu Park, Hyeonjeong Kang, Gyu-Won Han, Hui Jae Cho, Yeonsang Park","doi":"10.1515/nanoph-2024-0700","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0700","url":null,"abstract":"Metasurfaces, two-dimensional planar optical devices based on subwavelength-scale structures, have garnered significant attention for their potential to replace conventional optical components in various fields. These devices can manipulate the amplitude, phase, and polarization of light in versatile ways, offering complex functionalities within a single, space-efficient device. However, enhancing their functionality remains a challenge, requiring an expansion in the design flexibility of the structural elements, known as meta-atoms. In this study, we revealed that by varying the two independent lengths of the cross-shaped structure at a wavelength of 980 nm, a phase singularity exists in the region of high reflection. In addition, we found that the phase of transmitted light can be modulated from 0 to 2π by encircling this singularity. Based on the identified phase singularity, we designed and fabricated a polarization-independent metalens with varying numerical apertures to experimentally validate the feasibility of high-reflectivity transmissive wavefront engineering metasurfaces. The introduced meta-atoms based on a phase singularity are expected to open new avenues for applications, such as those requiring light attenuation and concentration simultaneously or the development of resonant cavity structures capable of beam modulation.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"61 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Transverse orbital angular momentum of amplitude perturbed fields

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-03-18 DOI: 10.1515/nanoph-2024-0595

Scott W. Hancock, Nishchal Tripathi, Manh S. Le, Andrew Goffin, Howard M. Milchberg

引用次数: 0