arXiv: Optics
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#1Guo-Qun Chen (WIT: Wuhan Institute of Technology)
#2Hong-Yang Zhao (WIT: Wuhan Institute of Technology)
Last. Rui-Bo Jin (WIT: Wuhan Institute of Technology)H-Index: 16
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Highly efficient terahertz (THz) wave sources based on difference frequency generation (DFG) process in nonlinear optical crystals play an important role for the applications of THz wave. In order to find more novel nonlinear crystals, here we theoretically investigate the generation of THz wave using the isomorphs of periodically poled \mathrm{KTiOPO_4}(PPKTP), including periodically poled RTP, KTA, RTA and CTA. By solving the cascaded difference frequency coupled wave equations, it is found...
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#1Nikita Ustimenko (Saint Petersburg State University of Information Technologies, Mechanics and Optics)
#2D. F. KornovanH-Index: 7
Last. Mihail I. PetrovH-Index: 22
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Exciting optical effects such as polarization control, imaging, and holography were demonstrated at the nanoscale using the complex and irregular structures of nanoparticles with the multipole Mie-resonances in the optical range. The optical response of such particles can be simulated either by full wave numerical simulations or by the widely used analytical coupled multipole method (CMM), however, an analytical solution in the framework of CMM can be obtained only in a limited number of cases. ...
#1Tobias WittingH-Index: 26
#2Mikhail OsolodkovH-Index: 1
Last. Federico J. FurchH-Index: 12
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The generation of coherent light pulses in the extreme ultraviolet (XUV) spectral region with attosecond pulse durations constitutes the foundation of the field of attosecond science. Twenty years after the first demonstration of isolated attosecond pulses, they continue to be a unique tool enabling the observation and control of electron dynamics in atoms, molecules and solids. It has long been identified that an increase in the repetition rate of attosecond light sources is necessary for many ...
Last. Guangyuan Li (CAS: Chinese Academy of Sciences)H-Index: 16
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Plasmonic nanostructures with large local field enhancement have been extensively investigated for sensing applications. However, the quality factor and thus the sensing figure of merit are limited due to relatively high ohmic loss. Here we propose a novel plasmonic sensor with ultrahigh figure of merit based on super-narrow Rayleigh anomaly (RA) in a mirror-backed dielectric metasurface. Simulation results show that the RA in such a metasurface can have a super-high quality factor of 16000 in t...
#1Krishna C. Balram (UoB: University of Bristol)H-Index: 15
#2Kartik Srinivasan (NIST: National Institute of Standards and Technology)H-Index: 63
Piezoelectric optomechanical platforms represent one of the most promising routes towards achieving quantum transduction of photons between the microwave and optical frequency domains. However, there are significant challenges to achieving near-unity transduction efficiency. We discuss such factors in the context of the two main approaches being pursued for high efficiency transduction. The first approach uses one-dimensional nanobeam optomechanical crystals excited by interdigitated transducers...
#1Guangzhen LiH-Index: 6
#2Luojia WangH-Index: 1
Last. Xianfeng ChenH-Index: 30
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Constructions of synthetic lattices in photonics attract growingly attentions for exploring interesting physics beyond the geometric dimensionality, among which modulated ring resonator system has been proved as a powerful platform to create different kinds of connectivities between resonant modes along the synthetic frequency dimension with many theoretical proposals. Various experimental realizations are investigated in a single ring resonator, while building beyond simple synthetic lattices i...
#1Jacopo Terragni (University of Trento)
Last. Antonio MiotelloH-Index: 58
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The material emitted from the target surface during laser ablation generates a net thrust (propulsion) in the opposite direction. The energetic efficiency of this laser-driven propulsion is given by the mechanical coupling coefficient (Cm). In this work we considered nanosecond UV laser ablation of the aluminum 6061 alloy to study the Cm behaviour with different irradiating conditions. This is done by systematically changing: fluence, uniform/nonuniform intensity, and incident angle of the laser...
#1Natsuko IshidaH-Index: 6
#2Yasutomo OtaH-Index: 22
Last. Satoshi IwamotoH-Index: 32
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Topological lasers have been intensively investigated as a strong candidate for robust single-mode lasers. A typical topological laser employs a single-mode topological edge state, which appears deterministically in a designed topological bandgap and exhibits robustness to disorder. These properties seem to be highly attractive in pursuit of high power lasers capable of single mode operation. In this paper, we theoretically analyze a large-scale single-mode laser based on a topological edge stat...
#1Chinmay KhandekarH-Index: 9
#2Weiliang JinH-Index: 15
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Detection of infrared (IR) photons in a room-temperature IR camera is carried out by a two-dimensional array of microbolometer pixels which exhibit temperature-sensitive resistivity. When IR light coming from the far-field is focused onto this array, microbolometer pixels are heated up in proportion to the temperatures of the far-field objects. The resulting resistivity change of each pixel is measured via on-chip electronic readout circuit followed by analog to digital (A/D) conversion, image p...
#1Muhammad Talal Ali Khan (UNSW: University of New South Wales)H-Index: 4
#2Haisu LiH-Index: 12
Last. Shaghik AtakaramiansH-Index: 13
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The recent development of the terahertz waveguide makes it an excellent platform for integrating many intriguing functionalities, which offers tremendous potential to build compact and robust terahertz systems. In the context of next-generation high-speed communication links at the terahertz band, engineering the dispersion and birefringence of terahertz waves is essential. Here, we experimentally demonstrate subwavelength birefringent waveguide gratings based on the low-loss cyclic olefin copol...
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