Terahertz nonlinear index extraction via full-phase analysis
Abstract
We experimentally show the spectrally averaged nonlinear refractive index and absorption coefficient for liquid water, water vapor, α -pinene, and Si using a full-phase analysis in the terahertz regime through a standard time-domain spectrometer. Our results confirm that the nonlinear index of refraction of the liquid samples in this regime exceeds the near-infrared optical nonlinear index by six orders of magnitude. In the case of liquid water and water vapor at atmospheric pressure, we find a nonlinear index of 7.8 × 10 − 10 c m 2 / W and 6 × 10 − 11 c m 2 / W , respectively, which are both much larger than expected.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 07, 2020
- Source ID
- 10.1364/ol.399999
Entities
People
- Kareem J. Garriga Francis
- Mervin Lim Pac Chong
- X.-C. Zhang
- Yiwen E
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Gates Foundation
- National Science Foundation