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Enhanced second harmonic generation in high-$Q$ all-dielectric metasurfaces with backward frequency conversion

Autor: Tu, Xu, Feng, Siqi, Li, Jiajun, Xing, Yangguang, Wu, Feng, Liu, Tingting, Xiao, Shuyuan

Publikováno v: Physical Review A 109 (6), 063522 (2024)

Here we employ the quasi-bound state in the continuum (quasi-BIC) resonance in all-dielectric metasurfaces for efficient nonlinear processes in consideration of the backward frequency conversion. We theoretically study the second-harmonic generation

Externí odkaz: http://arxiv.org/abs/2404.18696

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Deep neural networks for choice analysis: Enhancing behavioral regularity with gradient regularization

Autor: Feng, Siqi, Yao, Rui, Hess, Stephane, Daziano, Ricardo A., Brathwaite, Timothy, Walker, Joan, Wang, Shenhao

Publikováno v: Transportation Research Part C: Emerging Technologies, Volume 166, 2024, 104767

Deep neural networks (DNNs) frequently present behaviorally irregular patterns, significantly limiting their practical potentials and theoretical validity in travel behavior modeling. This study proposes strong and weak behavioral regularities as nov

Externí odkaz: http://arxiv.org/abs/2404.14701

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Efficient photon-pair generation empowered by dual quasi-bound states in the continuum

Autor: Liu, Tingting, Qin, Meibao, Feng, Siqi, Tu, Xu, Guo, Tianjing, Wu, Feng, Xiao, Shuyuan

Publikováno v: Physical Review B 109 (15), 155424 (2024)

Here we demonstrate the efficient photon-pair generation via spontaneous parametric down conversion from a semiconductor metasurface supporting dual quasi-bound states in the continuum (quasi-BICs). In a simple metasurface design composed of AlGaAs e

Externí odkaz: http://arxiv.org/abs/2401.14140

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Enhanced sum-frequency generation from etchless lithium niobate empowered by dual quasi-bound states in the continuum

Autor: Feng, Siqi, Liu, Tingting, Chen, Wenya, Wu, Feng, Xiao, Shuyuan

Publikováno v: SCIENCE CHINA Physics, Mechanics & Astronomy 66 (12), 124214 (2023)

The miniaturization of nonlinear light sources is central to the integrated photonic platform, driving a quest for high-efficiency frequency generation and mixing at the nanoscale. In this quest, the high-quality ($Q$) resonant dielectric nanostructu

Externí odkaz: http://arxiv.org/abs/2305.18693

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Akademický článek

Digital Social Identity Management: Current Status, Problems, and Countermeasures

Autor: Yu Rui, Deng Chen, Zhao Yang, Lu Hongbo, Qiu Xuhua, Feng Siqi

Publikováno v: 中国工程科学, Vol 26, Iss 3, Pp 207-216 (2024)

Currently, China is undergoing a comprehensive transition toward a digital society, which has placed renewed emphasis on the need for robust national-level digital management capabilities. Identity management serves as a foundational support for the

Externí odkaz: https://doaj.org/article/84aabd6048a24cbc97a82028fe435b7e