Detection of water on Earth-like exoplanets using ultra narrowband photonic defect modes

Jiayang Xu; Hossein Alisafaee

doi:10.1117/12.3041405

20 November 2024 Detection of water on Earth-like exoplanets using ultra narrowband photonic defect modes

Jiayang Xu, Hossein Alisafaee

Proceedings Volume 13244, Nano-optoelectronics and Micro/Nano-photonics X; 1324414 (2024) https://doi.org/10.1117/12.3041405
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

When exoplanets pass their host stars, an absorption spectrum, the transmission spectrum, can be observed. From the transmission spectrum, the presence of different molecules can be implied. The detection of water has been a crucial area of research. This paper uses the Transfer Matrix Method and Matlab to design 1D photonic crystals that produce a photonic band gap with single or double defects. The designed structure of Air/(AB)³/C/AB³/Air where layer A is SiO₂, layer B is WTe₂, and layer C is Y bF₃ is applied to three filters. Considering the light curve obtained by the filtered light, the presence of water in an exoplanet’s atmosphere can be obtained. The defect modes centered at the wavelengths of 1.4μm and 1.9μm correspond to the two ranges of water absorption. The photonic filter can potentially be used to search for life-carrying planets.

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

Citation Download Citation

Jiayang Xu and Hossein Alisafaee "Detection of water on Earth-like exoplanets using ultra narrowband photonic defect modes", Proc. SPIE 13244, Nano-optoelectronics and Micro/Nano-photonics X, 1324414 (20 November 2024); https://doi.org/10.1117/12.3041405

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