Bright THz Source and Nonlinear Field-Matter Interaction
Abstract
The most important achievement among several others during this ARO grant during the closing year is that we have demonstrated broadband THz wave generation from liquid water. THz wave generations from solid, gas, and plasma have been demonstrated, however, THz wave generation from liquid materials, especially from polar liquid such as water, has not been reported. Einstein gave Einstein relation on Einstein coefficients (emission and absorption) 100 years ago. It says that emission and absorption coefficients are related. For water which has gigantic absorption coefficient in THz range, then it should have big emission capability. We are very happy that we are able to demonstrate it in liquid water. SciLight at American Physics Society and University of Rochester will have a press release soon. The students and postdoctoral were interviewed, photos were taken in the lab. Our aim is to develop a state-of-the-art, time-resolved bright THz source with at least 10 MV/cm THz peak field strength. This one-order-of-magnitude higher field strength THz source will open the door for many research frontiers in THz field-matter nonlinear interaction. We made significant progress in the following aspects last year:(1) Demonstrate broadband THz generation from liquid water. (2) Terahertz Radiation Enhanced Emission of Fluorescence (REEF) from elongated plasmas and microplasmas in the counter-propagating geometry. (3)Measurement of an extremely large nonlinear refractive index of crystalline ZnSe at terahertz frequencies by a modified Z-scan method. (4) Squeezing the fundamental temperature fluctuations of a high-Q microresonator.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 08, 2018
- Accession Number
- AD1074963
Entities
People
- Xi-Cheng Zhang
Organizations
- University of Rochester