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1 article(s) from Liang, Junfang

Double-layer symmetric gratings with bound states in the continuum for dual-band high-Q optical sensing

Chaoying Shi,
Jinhua Hu,
Xiuhong Liu,
Junfang Liang,
Jijun Zhao,
Haiyan Han and
Qiaofen Zhu

Beilstein J. Nanotechnol. 2022, 13, 1408–1417, doi:10.3762/bjnano.13.116

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Figure 1: Schematic of the double-layer symmetric gratings structure.

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Figure 2: Reflection spectra mapping of the DLSG-based structure with respect to wavelength and α.

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Figure 3: a) Reflection spectra of the structure with different α values. The magnetic field contours |Hy| fo...

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Figure 4: The complex eigenfrequencies of the two modes with respect to α.

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Figure 5: The Q-factor as a function of α of a) mode 1 and b) mode 2. The insets show the field distributions...

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Figure 6: Reflection spectra mapping of the sensor with respect to wavelength and different h values at α = 0...

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Figure 7: The Q-factor as a function of cavity length h of a) mode 1 and b) mode 2. The insets show the field...

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Figure 8: The S and FOM of a) mode 1 and b) mode 2 at different α values and h = 1000 nm. The S and FOM of c)...

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Figure 9: a) Reflection spectra of the sensor at different refractive indices of the gas medium. b) Positions...

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Full Research Paper

Published 25 Nov 2022

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