Ultrasensitive temperature sensor based on cascading a polarization mode interferometer with a Fabry-Perot interferometer

Zuo, Cheng; Wu, Ke; Shi, Jinhui; Guang, Dong; Wu, Xuqiang; Yu, Benli

doi:10.1016/j.optlastec.2023.109910

Cited by 8 publications

(1 citation statement)

References 27 publications

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“…Optical cavities play a fundamental role in photonics due to their superior ability to confine light in small spatial regions [1][2][3]. As a category of optical cavities, Fabry-Perot cavities have been widely utilized in interferometers [4][5][6], filters [7][8][9][10][11], absorbers [12,13], and polarization manipulation [14,15]. It is known that sandwich structures composed of two metal layers and a dielectric layer can be treated as Fabry-Perot cavities since two metal layers act as two optical mirrors [16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Tunable Near-Infrared Transparent Bands Based on Cascaded Fabry–Perot Cavities Containing Phase Change Materials

She,

Zhong,

et al. 2024

Photonics

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In this paper, we construct a near-infrared Fabry–Perot cavity composed of two sodium (Na) layers and an antimony trisulfide (Sb2S3) layer. By cascading two Fabry–Perot cavities, the transmittance peak splits into two transmittance peaks due to the coupling between two Fabry–Perot modes. We utilize a coupled oscillator model to describe the mode coupling and obtain a Rabi splitting of 60.0 meV. By cascading four Fabry–Perot cavities, the transmittance peak splits into four transmittance peaks, leading to a near-infrared transparent band. The near-infrared transparent band can be flexibly tuned by the crystalline fraction of the Sb2S3 layers. In addition, the effects of the layer thickness and incident angle on the near-infrared transparent band and the mode coupling are investigated. As the thickness of the Na layer increases, the coupling strength between the Fabry–Perot modes becomes weaker, leading to a narrower transparent band. As the thickness of the Sb2S3 layer increases, the round-trip propagating of the Sb2S3 layer increases, leading to the redshift of the transparent band. As the incident angle increases, the round-trip propagating of the Sb2S3 layer decreases, leading to the blueshift of the transparent band. This work not only provides a viable route to achieving tunable near-infrared transparent bands, but also possesses potential applications in high-performance display, filtering, and sensing.

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