Nanophotonics最新文献

{"title":"Interband plasmonic nanoresonators for enhanced thermoelectric photodetection","authors":"Golnoush Zamiri, Simon Wredh, Md Abdur Rahman, Nur Qalishah Adanan, Cam Nhung Vu, Hongtao Wang, Deepshikha Arora, Haruya Sugiyama, Wakana Kubo, Zhaogang Dong, Robert E. Simpson, Joel K.W. Yang","doi":"10.1515/nanoph-2024-0752","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0752","url":null,"abstract":"Thermoelectric photodetectors are robust alternatives to photodiodes with applications in extreme environments; however, the poor absorptivity of thermoelectric materials limits their photosensitivity. Here, we take a new look at the traditional thermoelectric materials Sb<jats:sub>2</jats:sub>Te<jats:sub>3</jats:sub> and Bi<jats:sub>2</jats:sub>Te<jats:sub>3</jats:sub> in their recently discovered ability to support interband plasmonic resonances in the visible spectrum. We fabricated nanoresonators directly into the thermoelectric materials to improve their optical absorptance through plasmonic field enhancements, leading to improved photo-thermoelectric conversion. A thermoelectric detector with Sb<jats:sub>2</jats:sub>Te<jats:sub>3</jats:sub> and Bi<jats:sub>2</jats:sub>Te<jats:sub>3</jats:sub> nanostructures demonstrated ∼90 % optical absorptance across the visible spectrum, more than twice that of unpatterned materials. The solid-state device was fabricated on a substrate and exhibited a response time of 160 µs and a specific detectivity of <jats:inline-formula> <jats:alternatives> <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\"> <m:mn>3.2</m:mn> <m:mo>×</m:mo> <m:mn>1</m:mn> <m:msup> <m:mrow> <m:mn>0</m:mn> </m:mrow> <m:mrow> <m:mn>6</m:mn> </m:mrow> </m:msup> <m:mspace width=\"2.77695pt\"/> <m:mtext>cm H</m:mtext> <m:msup> <m:mrow> <m:mtext>z</m:mtext> </m:mrow> <m:mrow> <m:mn>1</m:mn> <m:mfenced close=\"\" open=\"/\"> <m:mrow/> </m:mfenced> <m:mn>2</m:mn> </m:mrow> </m:msup> <m:mspace width=\"2.77695pt\"/> <m:msup> <m:mrow> <m:mtext>W</m:mtext> </m:mrow> <m:mrow> <m:mo>−</m:mo> <m:mn>1</m:mn> </m:mrow> </m:msup> </m:math> <jats:tex-math>$left.3.2{times}1{0}^{6} text{cm,H}{text{z}}^{1/right.2} {text{W}}^{-1}$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"graphic/j_nanoph-2024-0752_ineq_001.png\"/> </jats:alternatives> </jats:inline-formula>. Our demonstration that plasmonic and thermoelectric properties can be exploited within the same material could advance photodetectors and other optoelectronic technologies, such as biosensors, solar cells, and integrated spectrometers.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"17 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143733882","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}

{"title":"Chiral phase-imaging meta-sensors","authors":"Ahmet M. Erturan, Jianing Liu, Maliheh A. Roueini, Nicolas Malamug, Lei Tian, Roberto Paiella","doi":"10.1515/nanoph-2024-0759","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0759","url":null,"abstract":"Light waves possess multiple degrees of freedom besides intensity, including phase and polarization, that often contain important information but require complex and bulky systems for their measurement. Here we report a pair of compact multifunctional photodetectors that can selectively measure the local phase gradient of, respectively, the right and left circular-polarization component of any incident wave. These devices employ a chiral pair of integrated plasmonic metasurfaces to introduce a sharp dependence of responsivity on local direction of propagation of the desired polarization component. An order-of-magnitude polarization selectivity with respect to phase gradient is demonstrated with both devices. Using the measured device characteristics, we also describe computationally a pixel array that allows for the simultaneous separate mapping of the right and left circularly-polarized incident wavefronts in a particularly simple imaging setup. These unique capabilities may be exploited to enable new functionalities for applications in chemical sensing, biomedical microscopy, and machine vision.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"125 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723226","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}

{"title":"High accuracy inverse design of reconfigurable metasurfaces with transmission-reflection-integrated achromatic functionalities","authors":"Xiao-Qiang Jiang, Wen-Hui Fan, Xu Chen, Lv-Rong Zhao, Chong Qin, Hui Yan, Qi Wu, Pei Ju","doi":"10.1515/nanoph-2024-0680","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0680","url":null,"abstract":"Artificial intelligence algorithms based on deep neural network (DNN) have become an effective tool for conceiving metasurfaces recently. However, the complex and sharp resonances of metasurfaces will tremendously increase the training difficulty of DNNs with non-negligible prediction errors, which hinders their development in designing multifunctional metasurfaces. To overcome the obstacles, the interaction mechanisms between meta-atoms and terahertz (THz) waves via multipole decomposition are investigated to establish a high-quality dataset, which can decrease the complexity of DNN and improve the prediction accuracy. Meanwhile, transfer learning is also employed to reduce the large quantity of training data required by the DNN. Accordingly, two broadband and transmission-reflection-integrated reconfigurable metasurfaces for focused vortex beam generation are inversely designed by counter propagating the DNN with fraction error less than 10<jats:sup>−4</jats:sup>. The results indicate that transmission-reflection-integrated achromatic performances are well achieved in the frequency range of 0.7–1.3 THz, which have the average focusing efficiency and mode purity higher than 48 % and 92 %, respectively. Moreover, transmission-reflection-integrated achromatic THz imaging and edge detection can also be realized by the metasurfaces. This work provides a high accuracy inverse design method for conceiving multifunctional meta-devices, which may promise further progress for the on-chip THz imaging systems.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"77 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723229","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}

{"title":"Recovery of topologically robust merging bound states in the continuum in photonic structures with broken symmetry","authors":"Huayu Bai, Andriy Shevchenko, Radoslaw Kolkowski","doi":"10.1515/nanoph-2024-0609","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0609","url":null,"abstract":"Optical bound states in the continuum (BICs) provide a unique mechanism of light confinement that holds great potential for fundamental research and applications. Of particular interest are merging BICs realized in planar periodic structures by merging accidental and symmetry-protected BICs. Topological nature of merging BICs renders their <jats:italic>Q</jats:italic> factors exceptionally high and robust. However, the existence of accidental BICs with the radiation loss canceled in both the upward and downward directions relies on the up-down mirror symmetry of the structure. If this symmetry is broken, e.g., by a substrate, the <jats:italic>Q</jats:italic> factor of the mode drops down. Consequently, ultrahigh-<jats:italic>Q</jats:italic> merging BICs cannot be achieved in substrate-supported structures. Here, by studying the case of a one-dimensional periodic dielectric grating, we discover a simple method to fully compensate for the detrimental effect of breaking the up-down mirror symmetry. The method makes use of a thin layer of a high-refractive-index dielectric material on one side of the structure, allowing one to restore the diverging <jats:italic>Q</jats:italic> factor of the accidental BIC and fully recover the merged BIC. As an application example, we show that the proposed structures can be used as ultrahigh-performance optical sensors.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"61 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723228","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}

{"title":"Effectively suppressed reflected photonic spin Hall effect","authors":"Lijuan Sheng, Zixiao Xu, Yong Cao, Yawei Tan, Xiaohui Ling, Xinxing Zhou","doi":"10.1515/nanoph-2025-0089","DOIUrl":"https://doi.org/10.1515/nanoph-2025-0089","url":null,"abstract":"The photonic spin Hall effect can engender transverse spatial and angular displacements in both transmission and reflection, with significant applications in optical imaging, edge detection, and the development of spin-based nanophotonic devices. While previous research has focused on enhancing the photonic spin Hall effect, suppression can be beneficial for photonic spin-switching, offering advantages such as increased speed and sensitivity in nanophotonic devices. In this study, we establish a quantitative correlation between the reflection coefficient and the transverse spatial and angular displacements of reflected light, as induced by the photonic spin Hall effect, grounded in electromagnetic theory. We find that the transverse spatial displacement of reflected light can be eliminated under the condition <jats:italic>r</jats:italic> <jats:sub> <jats:italic>pp</jats:italic> </jats:sub> = −<jats:italic>r</jats:italic> <jats:sub> <jats:italic>ss</jats:italic> </jats:sub>, where <jats:italic>r</jats:italic> denotes the reflection coefficient, and the first (second) superscript denotes the polarization of the reflected (incident) light. This condition applies to light with arbitrary polarization states, at arbitrary incident angles, and is independent of wavelength and beam waist. A similar outcome is obtained for the transverse angular displacement of the reflected light. Such distinctive displacements are attainable through the use of an electromagnetic interface that satisfies the reflected condition <jats:italic>r</jats:italic> <jats:sub> <jats:italic>pp</jats:italic> </jats:sub> = −<jats:italic>r</jats:italic> <jats:sub> <jats:italic>ss</jats:italic> </jats:sub>. Additionally, we provide a succinct overview of the methodologies for constructing reflective spin switches.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"183 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723225","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}

{"title":"Fiber-assisted nanoparticle tracking analysis meets nanorheology: a novel approach for probing viscoelastic properties at the nanoscale","authors":"Torsten Wieduwilt, Hannah Geisler, Ronny Förster, Adrian Lorenz, Markus A. Schmidt","doi":"10.1515/nanoph-2024-0754","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0754","url":null,"abstract":"This study introduces fiber-assisted nanoparticle tracking analysis (FaNTA) as a platform for nanorheology that utilizes an advanced antiresonant optical fiber to analyze the viscoelastic properties of fluids at the nanoscale. The platform confines colloidal nanotracers within a fiber-integrated microchannel, significantly extending observation times and improving statistical accuracy. The FaNTA system consists of a custom-designed microstructured antiresonant fiber, a dedicated optical setup, and sophisticated data processing including image analysis and statistical filtering, enabling precise determination of the hydrodynamic diameter and thus the local viscosity. The study demonstrates the capabilities of the FaNTA concept in the context of rheology by measuring the viscosity of glycerol-water solutions at different concentrations using 50 nm gold nanospheres as nanoprobes. By analyzing their individual diffusive motion, the platform accurately determines fluid viscosities with results that closely match literature values, validating the efficacy of FaNTA for nanorheological applications. FaNTA’s high accuracy and performance in nano- and microrheological measurements highlight its broad potential in nanoscale materials science, dynamic process studies, life and environmental sciences, and nanochemistry. This innovative approach provides a valuable extension to current microrheological methods and offers precise nanoscale fluid characterization for a wide range of applications.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"33 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678152","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}

{"title":"Optical control of levitated nanoparticles via dipole–dipole interaction","authors":"Sandeep Sharma, Seongi Hong, Andrey S. Moskalenko","doi":"10.1515/nanoph-2024-0287","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0287","url":null,"abstract":"We propose a scheme to create and unidirectionally transport thermal squeezed states and random-phase coherent states in a system of two interacting levitated nanoparticles. In this coupled levitated system, we create a thermal squeezed state of motion in one of the nanoparticles by parametrically driving it and then transporting the state to the other nanoparticle by making use of a unidirectional transport mechanism. This mechanism is based on inducing a nonreciprocal type of coupling in the system by suitably modulating the phases of the trapping lasers and the interparticle distance between the levitated nanoparticles. A nonreciprocal coupling creates a unidirectional channel where energy flows from one nanoparticle to the other nanoparticle but not vice versa, thereby allowing for the transport of mechanical states between the nanoparticles. We also affirm this unidirectional transport mechanism by creating and efficiently transporting a random-phase coherent state in the coupled levitated system. In both instances of mechanical state transport, the final nanoparticle showed similar characteristics to the original nanoparticle, depicting a high-fidelity unidirectional transport mechanism. Further, we make use of the feedback nonlinearity and parametric driving to create simultaneous bistability in the coupled levitated system also via this unidirectional mechanism. Our results may have potential applications in tunable sensing, metrology, quantum networks, and in exploring many-body physics under a controlled environment.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"22 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702771","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}

{"title":"One million quality factor integrated ring resonators in the mid-infrared","authors":"Marko Perestjuk, Rémi Armand, Miguel Gerardo Sandoval Campos, Lamine Ferhat, Vincent Reboud, Nicolas Bresson, Jean-Michel Hartmann, Vincent Mathieu, Guanghui Ren, Andreas Boes, Arnan Mitchell, Christelle Monat, Christian Grillet","doi":"10.1515/nanoph-2024-0761","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0761","url":null,"abstract":"We report ring resonators on a silicon germanium on silicon platform operating in the mid-infrared wavelength range around 3.5–4.6 µm with quality factors reaching up to one million. Advances in fabrication technology enable us to demonstrate such high <jats:italic>Q</jats:italic>-factors, which put silicon germanium at the forefront of mid-infrared integrated photonic platforms. The achievement of high <jats:italic>Q</jats:italic> is attested by the observation of degeneracy lifting between clockwise (CW) and counter-clockwise (CCW) resonances, as well as optical bistability due to an efficient power buildup in the rings.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"61 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665871","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}

{"title":"Synthesis of space-time wave packets using correlated frequency comb and spatial field","authors":"Alan E. Willner, Xinzhou Su, Yue Zuo, Yingning Wang, Zile Jiang, Amir Minoofar, Hongkun Lian, Zixun Zhao, Abdulrahman Alhaddad, Ruoyu Zeng","doi":"10.1515/nanoph-2024-0771","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0771","url":null,"abstract":"Shaping transverse degrees of freedom across different temporal frequency spectra has unlocked new possibilities for realizing a wide variety of novel spatiotemporal phenomena. In particular, using the discrete frequencies of optical frequency combs for spatiotemporal synthesis enables precise spatial separation and control of individual spectral lines, thereby facilitating the experimental generation of space-time wave packets (STWPs). This review explores the theoretical investigation and experimental demonstration of versatile STWPs synthesized using correlated frequency comb lines and spatial fields, including the following: (a) STWPs exhibiting dynamic evolution of spatial properties; (b) STWPs with customized group velocities; and (c) longitudinal control over the dynamic evolution of STWPs.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"70 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665914","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}

{"title":"Collective multimode strong coupling in plasmonic nanocavities","authors":"Angus Crookes, Ben Yuen, Angela Demetriadou","doi":"10.1515/nanoph-2024-0618","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0618","url":null,"abstract":"Plasmonic nanocavities enable access to the quantum properties of matter but are often simplified to single mode models despite their complex multimode structure. Here, we show that off-resonant plasmonic modes in fact play a crucial role in strong coupling and determine the onset of a novel collective interaction. Our analysis reveals that <jats:italic>n</jats:italic> strongly coupled plasmonic modes introduce up to <jats:italic>n</jats:italic>(<jats:italic>n</jats:italic> + 1)/2 oscillation frequencies that depend on their coupling strengths and detuning’s from the quantum emitter. Furthermore, we identify three distinct regions as the coupling strength increases: (1) single mode, (2) multimode and (3) collective multimode strong coupling. Our findings enhance the understanding of quantum dynamics in realistic plasmonic environments and demonstrate their potential to achieve ultra-fast energy transfer in light-driven quantum technologies.","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":"143665903","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}