- 标题
- 摘要
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- 实验方案
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Meta-optics and bound states in the continuum
摘要： We discuss the recent advances in meta-optics and nanophotonics associated with the physics of bound states in the continuum (BICs). Such resonant states appear due to a strong coupling between leaky modes in optical guiding structures being supported by subwavelength high-index dielectric Mie-resonant nanoantennas or all-dielectric metasurfaces. First, we review brie?y very recent developments in the BIC physics in application to isolated subwavelength particles. We pay a special attention to novel opportunities for nonlinear nanophotonics due to the large ?eld enhancement inside the particle volume creating the resonant states with high-quality (high-Q) factors, the so-called quasi-BIC, that can be supported by the subwavelength particles. Second, we discuss novel applications of the BIC physics to all-dielectric optical metasurfaces with broken-symmetry meta-atoms when tuning to the BIC conditions allows to enhance substantially the Q factor of the ?at-optics dielectric structures. We also present the original results on nonlinear high-Q metasurfaces and predict that the frequency conversion ef?ciency can be boosted dramatically by smart engineering of the asymmetry parameter of dielectric metasurfaces in the vicinity of the quasi-BIC regime.
关键词： bound states in the continuum,high-Q resonances,nanophotonics,nonlinear nanophotonics,BICs,dielectric metasurfaces,meta-optics
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE Photonics Conference (IPC) - Reston, VA, USA (2018.9.30-2018.10.4)] 2018 IEEE Photonics Conference (IPC) - Cavity Optomechanical Photothermal Sensors
摘要： We experimentally demonstrate a cavity optomechanical sensor that is actuated with gradient optical forces. The sensor can detect incident radiation via absorption and resulting photothermally-induced frequency shifts of the nanomechanical oscillator. Analysis suggests that nanostrain sensitivity and fJ-level energy detection are possible.
关键词： Photothermal effects,Strain measurement,Nanoelectromechanical systems,Nanosensors,Optical waveguides,Nanophotonics
更新于2025-09-09 09:28:46
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[IEEE 2018 IEEE Photonics Conference (IPC) - Reston, VA, USA (2018.9.30-2018.10.4)] 2018 IEEE Photonics Conference (IPC) - Measuring Thermal Acoustic Radiation with an Optomechanical Antenna
摘要： We optically probe the SiN membrane nanomechanical resonator modes that are strongly coupled to acoustic radiation into the substrate. We use this optomechanical system for temperature metrology by detecting the ballistic transport of thermal excitations from a remote bath.
关键词： Metrology,Temperature Sensors,Optomechanics,Photonics,Thermal Noise,Nanophotonics
更新于2025-09-09 09:28:46
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Applied Nanophotonics || Lightwaves in restricted geometries
摘要： The subject of this chapter is propagation, reflection, and evanescence of electromagnetic waves in continuous and complex media and structures to introduce the basics of wave optics and its implementation in novel nanophotonic conceptions. Electromagnetic waves propagate in a medium with positive permittivity, reflect at every permittivity step, and evanesce in a metal featuring negative permittivity. Combination of different dielectrics allows for wave confinement, tunneling, and energy storage, and gives rise to the photonic crystals notion. Combination of a metal with a dielectric material in nanostructures allows for optical material design like stained glass and very high local concentration of incident field to arrive at the notion of nanoplasmonics and optical antennas.
关键词： wave optics,photonic crystals,optical antennas,nanophotonics,electromagnetic waves,nanoplasmonics
更新于2025-09-09 09:28:46
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Applied Nanophotonics || Emerging nanophotonics
摘要： In this chapter a number of challenging trends in modern nanophotonics are highlighted that can be traced based on extensive research during the last decades. These are the colloidal technological platform, nanoplasmonics to enhance light–matter interaction, novel optical sensors based on nanostructures, advances toward the silicon photonic platform, negative refractive index materials, and single photon emitters. These novel trends and ideas, when seen together, provide a definite forecast for new exciting devices and systems to appear in the next decades and present nanophotonics as an extremely active and promising field of research and development.
关键词： silicon photonic platform,optical sensors,colloidal technological platform,negative refractive index materials,nanophotonics,single photon emitters,nanoplasmonics
更新于2025-09-09 09:28:46
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Photonic Nanostructures from Hexagonal Boron Nitride
摘要： Growing interest in devices based on layered van der Waals (vdW) materials is motivating the development of new nanofabrication methods. Hexagonal boron nitride (hBN) is one of the most promising materials for studies of quantum photonics and phonon polaritonics. A promising nanofabrication process used to fabricate several hBN photonic devices using a hybrid reactive ion etching (RIE) and electron beam-induced etching (EBIE) technique is reported in detail here. The shortcomings and benefits of RIE and EBIE are highlighted and the utility of the hybrid approach for the fabrication of suspended and supported device structures with nanoscale features and highly vertical sidewalls are demonstrated. Functionality of the fabricated devices is proven by measurements of high-quality cavity optical modes (Q ≈ 1500). This nanofabrication approach constitutes an advance toward an integrated, monolithic quantum photonics platform based on hBN and other layered vdW materials.
关键词： hexagonal boron nitride,photonic devices,nanofabrication,nanophotonics,layered materials
更新于2025-09-04 15:30:14
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Total Reflection Metasurface with Pure Modulated Signal
摘要： Metasurface has been proposed as one critical platform for orbital angular momentum (OAM) multiplexing. While metasurfaces have unique advantages to achieve light modulation with an ultrathin 2D layer, the relatively low transfer efficiency is a primary drawback. Such weakness leads to the mixing of unmodulated light into the output signal and greatly limits the functionality. A new design strategy is presented to fabricate self-filtering metasurface with pure signal light, which is computationally and experimentally verified on different applications, and it is also insensitive to the incident light polarization. Normal metasurface system requires bulky polarizer and filter, while our ultrathin design paves the way to multifunctional metasurface-based chip-scale circuits to replace the conventional bulky optical components. A proof-of-principle meta-cavity is designed to improve the transfer efficiency by 83%, while theoretical calculation shows 633% enhancement for an upgraded setup. This design can be widely applied to OAM optics, integrated photonics, optical sensing, data processing, and nanoimaging.
关键词： noise reduction,metasurfaces,nanophotonics,efficiency enhancement
更新于2025-09-04 15:30:14
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Dewetting mechanisms and their exploitation for the large-scale fabrication of advanced nanophotonic systems
摘要： Recent progress in submicron- and nano-fabrication technologies has led to the emergence of novel photonic structures such as optical nanoantennas and metasurfaces. Real-life applications of these advanced photonic structures still require substantial improvement of the fabrication processes, in terms of their throughput and cost-effectiveness. Because of its simplicity and effectiveness, dewetting of a thin film has attained increasing attention as a feasible process for improving the scalability and productivity. Here, we provide an overview of the mechanisms and phenomenologies of dewetting to foster an improved fundamental understanding necessary for the optimisation of the dewetting process condition and template design. We then review the strategies demonstrating the use of templated-dewetting for producing well-aligned arrays of submicron- and nanostructures with great control over their size, shape and arrangement. Recent applications of dewetted structures in advanced nanophotonics are reviewed with an emphasis on the exploitation of dewetting mechanisms. Special attention is given to the fabrication of resonant optical nanoantennas and nanophotonic applications in which high repeatability and throughput are important parameters: sensing, colourisation, photovoltaics and nonlinear light frequency conversion. We expect this review to provide a basis for the use of thin-film dewetting to realise the industrial-level fabrication of various practical advanced photonic systems.
关键词： optical nanoantenna,interfacial instability,plasmonics,all-dielectric nanophotonics,nanofabrication,advanced photonic applications,Dewetting,thin film
更新于2025-09-04 15:30:14
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[IEEE 2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM) - Erlagol (Altai Republic), Russia (2018.6.29-2018.7.3)] 2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM) - Examination of Physical Phenomena and Processes in the Magnetophotonic Composite Media. Magnetophotonics Material Medium
摘要： The development of radioelectronics and informative–and–communicative technologies of the XXI century is associated with the transmission of ever increasing volume of data and is oriented to use of subTHz and THz bands – SHF, EHF, and HHF (0.1 – 10 THz). Elements and devices of these bands can be conditionally divided into 2 levels: up to 1THz electronic equipments are effectively uses, over 1 THz –are photonic devices. The development of photonic technologies is of increasing importance both in the telecommunicative and in the space communication systems. In this report the physical phenomena and processes occurring in magnetooptical (magnetophotonic) composite material media capable of optimally ensuring their efficiency have been investigated to create new element baseline for domestic radioelectronics. The creation of new–generation functional devices capable of operating in subTHz and THz frequency bands will entail the rapid development of telecommunications.
关键词： Kerr effect,laser radiation,magnetophotonics,Maxwell's equations,self–focusing of light,nonlinear photonic media,Green's functions,Nanophotonics,current harmonics
更新于2025-09-04 15:30:14
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Highly Sensitive, Affordable, and Adaptable Refractive Index Sensing with Silicon‐Based Dielectric Metasurfaces
摘要： A sensing platform is presented that uses dielectric Huygens source metasurfaces to measure refractive index changes in a microfluidic channel with experimentally measured sensitivity of 323 nm RIU?1, a figure of merit (FOM) of 5.4, and a response of 8.2 (820%) change in transmittance per refractive index unit (T/RIU). Changes in the refractive index of liquids flown through the channel are measured by single-wavelength transmittance measurement, requiring only a simple light source and photodetector, significantly reducing device expense in comparison to state-of-the-art refractive index sensing technologies. A technoeconomic analysis predicts a device costing ≈$2400 that is capable of detecting refractive index changes of the order of 2*10?8. The metasurfaces utilized are low profile, scalable, and use materials and fabrication processes compatible with CMOS and other technologies making them suitable for device integration. The Huygens metasurface system, characterized by spectrally overlapping electric and magnetic dipole modes, offers a high degree of customizability. Interplay between the two resonances may be controlled via metasurface geometry, leading to tunability of device sensitivity and measurement range. Ultrahigh sensitivity of 350 nm RIU?1 with FOM of 219, corresponding to single-wavelength sensitivity of 360 RIU?1, is demonstrated computationally through use of antisymmetric resonances of a Huygens metasurface illuminated at small incidence angles.
关键词： metasurface,refractive index sensing,subwavelength structures,biosensing,nanophotonics
更新于2025-09-04 15:30:14