THz spectroscopy is one of the key tools for atmospheric science on Earth as well as exploration of the planetary bodies within our solar system. Remote sensing (passive) THz spectroscopy reveals a wealth of information about the nature and composition of atmospheric gasses and is a key sensing method for the detection of water including its isotropic ratios and abundance. This paper discusses key technologies being developed for future THz remote sensing spectrometers at the Jet Propulsion Laboratory, with a focus on low-cost Earth observing missions and deep space planetary missions.
Adrian Tang, "Future THz spectroscopic instruments for earth and planetary science," Proc. SPIE 10639, Micro- and Nanotechnology Sensors, Systems, and Applications X, 106392A (Presented at SPIE Defense + Security: April 19, 2018; Published: 14 May 2018); https://doi.org/10.1117/12.2300190.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon