Showing papers by "Tsing-Hua Her published in 2022"
28 Jun 2022
TL;DR: In this paper , the authors proposed a monolithic optical bandpass filter with a transmission bandwidth tunable by the incident angle in a tri-mode high-contrast grating (HCG).
Abstract: We propose a monolithic optical bandpass filter with a transmission bandwidth tunable by the incident angle in a tri-mode high-contrast grating (HCG). We attribute this extraordinary phenomenon to the destructive interference between the TM 0 and TM 2 modes and the Fabry-Pérot resonance of the TM 1 mode, which can only be excited at the oblique incidence. The transmission bandwidth can be tuned from zero at normal incidence and increases quadratically with incident angle, while the center wavelength reds shifts slightly. The corresponding Q factor can be continuously tuned from 10 6 to 10 2 as the incident angle increases from nearly 0 o to 10 o .
01 May 2022
TL;DR: In this article , two pulse ablation experiments were conducted on monolayer MoS2 with various substrates and the hole size variation was explained via bandgap renormalization and carrier relaxation for different pulse separations.
Abstract: Two pulse ablation experiments were conducted on monolayer MoS2 with various substrates. The hole size variation is explained via bandgap renormalization and carrier relaxation for different pulse separations.
01 May 2022
TL;DR: In this article , multi-shot ablation studies of monolayer MoS2 and WS2 reveal the record optical robustness of these materials where optical damage results in laser-induced vacancies that greatly affect their optical properties.
Abstract: Multi-shot ablation studies of monolayer MoS2 and WS2 reveal the record optical robustness of these materials where optical damage results in laser-induced vacancies that greatly affect their optical properties.