Terahertz Second-Harmonic Generation in Extreme-Confinement Cavities

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.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2021

Author dc:creator

• Ateshian, Lamia

Advisor dc:contributor.advisor

• Englund, Dirk

Statement dc:rights

• In Copyright - Educational Use Permitted
• Copyright MIT

Licence dc:rights.uri

• http://rightsstatements.org/page/InC-EDU/1.0/

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/139000

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/139000