128 citations · 351 across the 9 of their papers we have counts for
9 papers
Efficient Second Harmonic Generation from Silicon Slotted Nanocubes with Bound States in the Continuum
C. Fang, Q. Yang, Q. Yuan +6
Optical materials with centrosymmetry, such as silicon and germanium, are unfortunately absent of second-order nonlinear optical responses, hindering their developments in efficien…
High-Q Resonances Governed by the Quasi-Bound States in the Continuum in All-Dielectric Metasurfaces
C. Fang, Q. Yang, Q. Yuan +6
The realization of high-Q resonances in a silicon metasurface with various broken-symmetry blocks is reported. Theoretical analysis reveals that the sharp resonances in the metasur…
Fano resonance from a one-dimensional topological photonic crystal
Linpeng Gu, Binbin Wang, Qingchen Yuan +4
An ultra-compact one-dimensional topological photonic crystal (1D-TPC) is designed in a single mode silicon bus-waveguide to generate Fano resonance lineshape. The Fano resonance c…
Giant Enhancement of Nonlinear Harmonic Generation in a Silicon Topological Photonic Crystal Nanocavity Chain
Qingchen Yuan, Linpeng Gu, Liang Fang +3
Strongly enhanced third-harmonic generation (THG) by the topological localization of an edge mode in a Su-Schrieffer-Heeger (SSH) chain of silicon photonic crystal nanocavities is…
A topological photonic ring-resonator for on-chip channel filters
Linpeng Gu, Qingchen Yuan, Qiang Zhao +5
A topologically protected ring-resonator formed in valley photonic crystals is proposed and fabricated on a silicon slab. The unidirectional transmission and robustness against str…
Second harmonic and sum-frequency generations from a silicon metasurface integrated with a two-dimensional material
Qingchen Yuan, Liang Fang, Hanlin Fang +5
Silicon-based nonlinear metasurfaces were implemented only with third-order nonlinearity due to the crystal centrosymmetry and the efficiencies are considerably low, which hinders…
Multiple optical frequency-conversions in few-layer GaSe assisted by a photonic crystal cavity
Liang Fang, Qingchen Yuan, Hanlin Fang +6
While two-dimensional (2D) materials have intriguing second-order nonlinearities with ultrahigh coefficient and electrical tunability, their atomic layer thicknesses hinder explora…
Low-power continuous-wave second harmonic generation in semiconductor nanowires
Qingchen Yuan, Liang Fang, He Yang +5
Semiconductor nanowires (NWs) are promising for realizing various on-chip nonlinear optical devices, due to their nanoscale lateral confinement and strong light-matter interaction.…
High performance graphene oxide-based humidity sensor integrated on a photonic crystal cavity
Xuetao Gan, Chenyang Zhao, Qingchen Yuan +5
We report a high performance relative humidity (RH) microsensor by coating a few-layer graphene oxide (GO) flake over a photonic crystal (PC) cavity. Since the GO layer has a high…