Terahertz Second-Harmonic Generation in Extreme-Confinement Cavities
Name
Ateshian-ateshian-SM-EECS-2021-thesis.pdf
Description
Thesis PDF
Size
12.38 MB
Format
Adobe PDF
Checksum (MD5)
8be528ca283dc47f16779b360442f80b
Author(s)
Ateshian, Lamia
Advisor(s)
Englund, Dirk
Date Issued
June 2021
Publisher
Massachusetts Institute of Technology
Abstract
It remains a standing challenge to produce high-power electromagnetic sources operating in the spectral range of 0.1-10 THz (the “terahertz gap"), a frequency band for applications ranging from spectroscopy to security and high-speed wireless communications. In this thesis, we will analyze a method to produce coherent radiation spanning the THz gap by second-harmonic generation (SHG) in low-loss dielectric structures, starting from the ∼100 GHz range. For this purpose, we present hybrid THz-band dielectric cavity designs that combine (1) nonlinear materials enhanced by phonon resonances with (2) extreme field concentration in high-quality-factor resonators. An efficient device for THz SHG would enable cascaded parametric frequency converters extensible into the mid-IR spectrum and beyond.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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