Resonant optical tunneling band-pass filter in the visible range

GU Zi-heng, ZANG Qiang, YE Jing-fei, ZHENG Gai-ge

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Chinese Journal of Light Scattering ›› 2022, Vol. 34 ›› Issue (2) : 116-120. DOI: 10.13883/j.issn1004-5929.202202002

Resonant optical tunneling band-pass filter in the visible range

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Abstract

The interactions between visible light wave and the prism-coupled multilayer optical film has been studied based on the transfer matrix method (TMM). A bandpass filter due to resonance tunneling is realized. The transmission spectrum of the composite structure is calculated, and the influence of the thickness of the air gap between the prisms on the filtering characteristics is analyzed. Under the incident light of transverse electric (TE) wave, the geometric parameters corresponding to the designed color are obtained through optimization calculation. Unlike the color filter in reflection mode, the proposed structure transmits a specific color and reflects the rest of the spectrum. After optimization, the structural parameters correspond to the red, green and blue (RGB) three-color filters are obtained with 100% high transmittance. The filter resonance wavelengths for red, green, and blue are 683 nm, 517 nm, and 444 nm, respectively.

Key words

Frustrated total internal reflection / Band-pass filter / Resonant optical tunneling

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GU Zi-heng, ZANG Qiang, YE Jing-fei, ZHENG Gai-ge. Resonant optical tunneling band-pass filter in the visible range. Chinese Journal of Light Scattering. 2022, 34(2): 116-120 https://doi.org/10.13883/j.issn1004-5929.202202002

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