Abstract-SOFIA in the era of JWST and ALMA

Harold W. Yorke; Erick T. Young; Eric E. Becklin, (Jason) Zhixin Zeng,

https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10700/107000E/SOFIA-in-the-era-of-JWST-and-ALMA/10.1117/12.2314222.short?SSO=1

SOFIA, the Stratospheric Observatory for Infrared Astronomy, is a joint project between NASA and the German Aerospace Center DLR to provide infrared and sub-millimeter observing capabilities to the worldwide astronomical community. With a wide range of instruments that cover both imaging and spectroscopy, SOFIA has produced unique scientific results that could not be obtained with a ground-based facility. In the coming decade, SOFIA will be a critical complement to the other major facilities for astronomical research, the James Webb Space Telescope (JWST) and the Atacama Large Millimeter/submillimeter Array (ALMA) by filling in the otherwise unobservable wavelength range of 30–300 μm. SOFIA provides a wide range of instrumentation, and this paper will describe some of the new capabilities in heterodyne spectroscopy, direct detection spectroscopy, and polarimetry.

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Abstract-Dielectric Properties of Zeolitic Imidazolate Frameworks in the Broad-Band Infrared Regime

Matthew R Ryder, (Jason) Zhixin Zeng, Kirill Titov, Jin-Chong Tan,

https://www.researchgate.net/publication/324948394_Dielectric_Properties_of_Zeolitic_Imidazolate_Frameworks_in_the_Broad-Band_Infrared_Regime

The field of metal-organic framework (MOF) materials is rapidly advancing towards practical applications, consequently it is urgent to achieve a better understanding and precise control of their physical properties. Yet research on the dielectric properties of MOFs is at its infancy, where studies are confined to the static dielectric behavior or lower frequency response (kHz-MHz) only. Herein we present the pioneering use of synchrotron-based infrared reflectivity experiments, combined with density functional theory (DFT) calculations to accurately determine the dynamic dielectric properties of zeolitic imidazolate frameworks (ZIFs: a topical family of MOFs). We show, for the first time, the frequency-dependent dielectric response of representative ZIF compounds, bridging the near-, mid-, and far-infrared (terahertz THz) broadband frequencies. We establish the structure-property relations as a function of framework porosity and structural change. Our comprehensive results will be paving the way for novel ZIF-based terahertz applications, such as infrared optical sensors and high-speed wireless communications.