Sb2Te3–Bi2Te3 Direct Photo–Thermoelectric Mid‐Infrared Detection

Simon Wredh; Mingjin Dai; Kenta Hamada; Md Abdur Rahman; Nur Qalishah Adanan; Golnoush Zamiri; Qing Yang Steve Wu; Wenhao Zhai; Nancy Wong Lai Mun; Zhaogang  Dong; Wakana Kubo; Qi Jie Wang; Joel K.W. Yang; Robert E. Simpson

doi:10.1002/adom.202401450

Sb₂Te₃–Bi₂Te₃ Direct Photo–Thermoelectric Mid‐Infrared Detection

Simon Wredh^*, Mingjin Dai, Kenta Hamada, Md Abdur Rahman, Nur Qalishah Adanan, Golnoush Zamiri, Qing Yang Steve Wu, Wenhao Zhai, Nancy Wong Lai Mun, Zhaogang Dong, Wakana Kubo, Qi Jie Wang, Joel K.W. Yang^*, Robert E. Simpson^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Downloads (Pure)

Abstract

A compact and responsive thermoelectric photodetector is introduced for the mid‐infrared. By resonantly coupling mid‐infrared light to a Sb₂Te₃‐Bi₂Te₃ thermoelectric junction, a thermocouple is formed that is directly heated by narrow‐band mid‐infrared radiation. Near‐perfect absorption is achieved at this hot junction through the resonantly enhanced coupling of light to free‐electrons in the Bi₂Te₃ and Sb₂Te₃ materials. The fabricated devices operate at 3.6 µm and demonstrate a responsivity of 10.2 V W⁻¹, a specific detectivity of 4.6 × 10⁶ cm Hz^1/2 W⁻¹, and a bandwidth in the order of 1 kHz. The optimal detection wavelength can be spectrally tuned by changing the resonant cavity dimensions. This work shows a path toward miniaturized mid‐infrared detectors and spectrometers with high sensitivity, responsivity, and bandwidth. Importantly, the device presented here is ideal for industrial production, which it is hoped will provide wider access to mid‐infrared technologies for chemical sensing, medicine, and security.

Original language	English
Article number	2401450
Number of pages	11
Journal	Advanced Optical Materials
Early online date	10 Sept 2024
DOIs	https://doi.org/10.1002/adom.202401450
Publication status	E-pub ahead of print - 10 Sept 2024

Keywords

mid-infrared
thermoelectric
Phase Change Material
Photodetector
sensors

Access to Document

10.1002/adom.202401450Licence: Creative Commons: Attribution (CC BY)

WredhS2024Sb2Te3Final published version, 4.7 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

Wredh, S., Dai, M., Hamada, K., Rahman, M. A., Adanan, N. Q., Zamiri, G., Wu, Q. Y. S., Zhai, W., Mun, N. W. L., Dong, Z., Kubo, W., Wang, Q. J., Yang, J. K. W., & Simpson, R. E. (2024). Sb₂Te₃–Bi₂Te₃ Direct Photo–Thermoelectric Mid‐Infrared Detection. Advanced Optical Materials, Article 2401450. Advance online publication. https://doi.org/10.1002/adom.202401450

@article{4f2aee2109874c4a840a2b00ddadb734,

title = "Sb2Te3–Bi2Te3 Direct Photo–Thermoelectric Mid‐Infrared Detection",

abstract = "A compact and responsive thermoelectric photodetector is introduced for the mid‐infrared. By resonantly coupling mid‐infrared light to a Sb2Te3‐Bi2Te3 thermoelectric junction, a thermocouple is formed that is directly heated by narrow‐band mid‐infrared radiation. Near‐perfect absorption is achieved at this hot junction through the resonantly enhanced coupling of light to free‐electrons in the Bi2Te3 and Sb2Te3 materials. The fabricated devices operate at 3.6 µm and demonstrate a responsivity of 10.2 V W−1, a specific detectivity of 4.6 × 106 cm Hz1/2 W−1, and a bandwidth in the order of 1 kHz. The optimal detection wavelength can be spectrally tuned by changing the resonant cavity dimensions. This work shows a path toward miniaturized mid‐infrared detectors and spectrometers with high sensitivity, responsivity, and bandwidth. Importantly, the device presented here is ideal for industrial production, which it is hoped will provide wider access to mid‐infrared technologies for chemical sensing, medicine, and security.",

keywords = "mid-infrared, thermoelectric, Phase Change Material, Photodetector, sensors",

author = "Simon Wredh and Mingjin Dai and Kenta Hamada and Rahman, {Md Abdur} and Adanan, {Nur Qalishah} and Golnoush Zamiri and Wu, {Qing Yang Steve} and Wenhao Zhai and Mun, {Nancy Wong Lai} and Zhaogang Dong and Wakana Kubo and Wang, {Qi Jie} and Yang, {Joel K.W.} and Simpson, {Robert E.}",

year = "2024",

month = sep,

day = "10",

doi = "10.1002/adom.202401450",

language = "English",

journal = "Advanced Optical Materials",

issn = "2195-1071",

publisher = "Wiley",

}

TY - JOUR

T1 - Sb2Te3–Bi2Te3 Direct Photo–Thermoelectric Mid‐Infrared Detection

AU - Wredh, Simon

AU - Dai, Mingjin

AU - Hamada, Kenta

AU - Rahman, Md Abdur

AU - Adanan, Nur Qalishah

AU - Zamiri, Golnoush

AU - Wu, Qing Yang Steve

AU - Zhai, Wenhao

AU - Mun, Nancy Wong Lai

AU - Dong, Zhaogang

AU - Kubo, Wakana

AU - Wang, Qi Jie

AU - Yang, Joel K.W.

AU - Simpson, Robert E.

PY - 2024/9/10

Y1 - 2024/9/10

N2 - A compact and responsive thermoelectric photodetector is introduced for the mid‐infrared. By resonantly coupling mid‐infrared light to a Sb2Te3‐Bi2Te3 thermoelectric junction, a thermocouple is formed that is directly heated by narrow‐band mid‐infrared radiation. Near‐perfect absorption is achieved at this hot junction through the resonantly enhanced coupling of light to free‐electrons in the Bi2Te3 and Sb2Te3 materials. The fabricated devices operate at 3.6 µm and demonstrate a responsivity of 10.2 V W−1, a specific detectivity of 4.6 × 106 cm Hz1/2 W−1, and a bandwidth in the order of 1 kHz. The optimal detection wavelength can be spectrally tuned by changing the resonant cavity dimensions. This work shows a path toward miniaturized mid‐infrared detectors and spectrometers with high sensitivity, responsivity, and bandwidth. Importantly, the device presented here is ideal for industrial production, which it is hoped will provide wider access to mid‐infrared technologies for chemical sensing, medicine, and security.

AB - A compact and responsive thermoelectric photodetector is introduced for the mid‐infrared. By resonantly coupling mid‐infrared light to a Sb2Te3‐Bi2Te3 thermoelectric junction, a thermocouple is formed that is directly heated by narrow‐band mid‐infrared radiation. Near‐perfect absorption is achieved at this hot junction through the resonantly enhanced coupling of light to free‐electrons in the Bi2Te3 and Sb2Te3 materials. The fabricated devices operate at 3.6 µm and demonstrate a responsivity of 10.2 V W−1, a specific detectivity of 4.6 × 106 cm Hz1/2 W−1, and a bandwidth in the order of 1 kHz. The optimal detection wavelength can be spectrally tuned by changing the resonant cavity dimensions. This work shows a path toward miniaturized mid‐infrared detectors and spectrometers with high sensitivity, responsivity, and bandwidth. Importantly, the device presented here is ideal for industrial production, which it is hoped will provide wider access to mid‐infrared technologies for chemical sensing, medicine, and security.

KW - mid-infrared

KW - thermoelectric

KW - Phase Change Material

KW - Photodetector

KW - sensors

U2 - 10.1002/adom.202401450

DO - 10.1002/adom.202401450

M3 - Article

SN - 2195-1071

JO - Advanced Optical Materials

JF - Advanced Optical Materials

M1 - 2401450

ER -