Photonics Research, Volume. 10, Issue 12, 2836(2022)
Enhancing THz fingerprint detection on the planar surface of an inverted dielectric metagrating
Fig. 1. Schematic drawing of THz molecular fingerprint sensing on a planar surface, where the all-dielectric metastructure supports a series of quasi-BICs by using angle-multiplexed signals. The symbols
Fig. 2. (a) Dispersion relations in the WG layer for the fundamental mode of TM wave and in the air. (b) Reflectance (
Fig. 3. (a) Reflectance of a bare metastructure as a function of frequency and
Fig. 4. (a) Complex refractive index of
Fig. 5. (a) Absorbance spectra of
Fig. 6. (a) Schematic drawing of the THz quasi-BIC all-dielectric metasensor using a thickness-multiplexed sensing scheme. (b) Reflectance as a function of frequency and thickness
Fig. 7. (a) Normalized electric field distributions of unloaded metastructures at
Fig. 8. Simulated reflectance spectra and Fano fitting for (a)
Fig. 9. (a) Reflectance spectra with different thicknesses
Fig. 10. (a) Absorbance spectra of
Fig. 11. (a) Angle-multiplexed reflectance spectra and envelope
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Xueying Liu, Wei Chen, Yongjie Ma, Yinong Xie, Jun Zhou, Liguo Zhu, Yadong Xu, Jinfeng Zhu. Enhancing THz fingerprint detection on the planar surface of an inverted dielectric metagrating[J]. Photonics Research, 2022, 10(12): 2836
Category: Optical Devices
Received: Aug. 4, 2022
Accepted: Oct. 18, 2022
Published Online: Nov. 24, 2022
The Author Email: Jinfeng Zhu (nanoantenna@hotmail.com)