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Proposed THz detector based on whispering gallery modes lithium niobate microdisk optical resonator.

Cosci A., Cerminara M., Righini G.C., Nunzi Conti G., Soria S., Farnesi D., Pelli S.
  Mercoledì 13/09   09:00 - 13:00   Aula A204   VI - Fisica applicata, acceleratori e beni culturali
In this study we propose a potential application of $LiNbO_{3}$ microdiscs as THz radiation detector. Due to the lithium niobate high absorption in the THz range, $LiNbO_{3}$ microdiscs are good candidates for converting electromagnetic radiation in heat. The high temperature sensitivity of Whispering Gallery Mode microdisc resonators can allow high precision measurements of the THz radiation absorbed power. The dependence of maximum sensitivity and acquisition rate on the sensor thickness are discussed, as well as the possibility to use different materials. Finally, the possible interference of the pyroelectric effect on the sensor capabilities is also discussed.