Femtosecond laser direct-write photoconductive patterns on tellurite glass

Gözden Torun; Anastasia Romashkina; Tetsuo Kishi; Yves Bellouard

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arXiv · 2305.04936

Femtosecond laser direct-write photoconductive patterns on tellurite glass

Gözden Torun·Anastasia Romashkina·Tetsuo Kishi·Yves Bellouard

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Abstract

We report the formation of arbitrary photoconductive patterns made of tellurium (Te) nanocrystals by exposing a tellurite (TeO2-based) glass to femtosecond laser pulses. During this process, Te/TeO2-glass nanocomposite interfaces with photoconductive properties form on the tellurite glass substrate. We show that these laser-written patterns have a highly reproducible photo-response, from the near ultraviolet (263 nm) to the visible spectrum, stable over a few months. Specifically, high responsivity (16.55 A/W) and detectivity (5.25*10^11 Jones) of a single laser-written line pattern are measured for an illumination dose of 0.07 mW/cm^2 at 400 nm. This work illustrates a pathway for locally turning a tellurite glass into functional photoconductor of arbitrary shape, without adding materials and using a single laser process step.

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Gözden Torun, Anastasia Romashkina, Tetsuo Kishi, Yves Bellouard. 2023-05-08. Femtosecond laser direct-write photoconductive patterns on tellurite glass. https://arxiv.org/abs/2305.04936

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