Mixed oxide provides an efficient solution to near infrared detection

Antoine Cheneau; Annick F. Dégardin; Alain J. Kreisler

doi:10.1117/12.2680357

23 October 2023 Mixed oxide provides an efficient solution to near infrared detection

Antoine Cheneau, Annick F. Dégardin, Alain J. Kreisler

Proceedings Volume 12737, Electro-Optical and Infrared Systems: Technology and Applications XX; 1273704 (2023) https://doi.org/10.1117/12.2680357
Event: SPIE Security + Defence, 2023, Amsterdam, Netherlands

Abstract

With the objective of producing high-performance infrared radiation detectors, we have undertaken the study of devices based on the Y-Ba-Cu-O material produced in amorphous film (a-YBCO) by DC sputtering at low temperature (< 150 °C) on p-doped silicon substrates coated with a SiO_x oxide film. Two types of structures have been considered: simple planar structures, where a-YBCO is connected to in-plane metal contacts, and trilayer structures where a-YBCO is sandwiched between the two contacts. The near-infrared response was recorded with a laser source at 850 nm wavelength, amplitude modulated up to 40 MHz. The main characteristics of the responses are: i) a 𝑓⁺² behavior at very low frequency (resulting from two dipolar relaxations); ii) a typically pyroelectric behavior in 𝑓⁺¹ up to a few tens of kHz; iii) a maximum response followed by a decrease in 𝑓^−1/2, reflecting the heat diffusion through the substrate. All of those results could be interpreted with the help of a theoretical model with adjustable parameters. Small size trilayer devices exhibit a very fast response (time constant: 11 ns). Besides, with noise equivalent power levels as low as 8 pW/Hz^1/2 and detectivity values of 8×10⁸ cm⋅Hz^1/2·W⁻¹ at 1 MHz, our uncooled devices are standing at the state-of-the-art both in terms of sensitivity and bandwidth.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Antoine Cheneau, Annick F. Dégardin, and Alain J. Kreisler "Mixed oxide provides an efficient solution to near infrared detection", Proc. SPIE 12737, Electro-Optical and Infrared Systems: Technology and Applications XX, 1273704 (23 October 2023); https://doi.org/10.1117/12.2680357

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