Optical properties of thin film novel chalcogenide materials and optical design for trace-gas sensing

Ibrahim El-Kholy; Al Alexis; Mohammad A. Khan

doi:10.1117/12.3013697

7 June 2024 Optical properties of thin film novel chalcogenide materials and optical design for trace-gas sensing

Ibrahim El-Kholy, Al Alexis, Mohammad A. Khan

Proceedings Volume 13026, Next-Generation Spectroscopic Technologies XVI; 1302606 (2024) https://doi.org/10.1117/12.3013697
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

Continuous progress in science, technology, and clean environmental regulations for energy requires low-power chip scale devices in sensing applications. Conventional trace gas sensing in the midinfrared region is highly sensitive. However, it requires a complex optomechanical setup that may not be suitable for wide-area deployments. This paper shows the development of new waveguide materials for near and mid-infrared silicon photonics ranging from 0.7 to 10 mm. These include amorphous semiconductors like Chalcogenide Glasses (ChGs) of Germanium-Selenium-Silicon (Ge-Se-S) elements with different compositions. UV-Vis measurements show the optical energy gap between 1.6 eV with high Se concentration to 3.8 eV, where Se is replaced by S in the compositions. ATRFTIR measurements show a high transmission spectrum ranging from 4000 to 400 cm^-1. We show the optical properties of such thin film materials in the broadband range of mid-infrared, suitable for fabricating waveguides and micro-resonator cavities for on-chip sensing applications.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ibrahim El-Kholy, Al Alexis, and Mohammad A. Khan "Optical properties of thin film novel chalcogenide materials and optical design for trace-gas sensing", Proc. SPIE 13026, Next-Generation Spectroscopic Technologies XVI, 1302606 (7 June 2024); https://doi.org/10.1117/12.3013697

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