Abstract-Optimized design for a terahertz parametric oscillator based on degenerate four-wave mixing in silicon nitride

Tahereh Amini and Fazel Jahangiri

https://www.osapublishing.org/josab/abstract.cfm?uri=josab-37-9-2725

We propose terahertz wave generation using a parametric oscillator based on phase-matched and non-phase-matched degenerate four-wave mixing processes within a silicon nitride Fabry–Perot microcavity. The central frequency of the generated terahertz waves would be tunable over the frequency range of 3.6–5.73 THz by varying the wavelength of the pump wave. The best phase-matching condition is achieved at a frequency of 5 THz, and an optimum peak power of 329 W is obtained at a frequency of 4.29 THz.

© 2020 Optical Society of America

Abstract:Intense terahertz emission from atomic cluster plasma produced by intense femtosecond laser pulses

Image by mightyohm via Flickr

http://apl.aip.org/resource/1/applab/v99/i26/p261503_s1?isAuthorized=no

Terahertz (THz) emission from argon cluster plasma, generated by intense femtosecond laser pulses in the energy range of 10–70 mJ, has been investigated. THz polarization, energy dependence, and angular distribution were measured to provide an initial discussion on the mechanisms of THz emission. THz pulses of much higher energy were generated from argon clusters than from argon gas, which indicates that plasma produced from atomic clusters holds considerable promise as an intense THz source.

© 2011 American Institute of Physics