Affiliation:
1. The Hong Kong University of Science and Technology
Abstract
To extend the detection range of time-domain spectroscopy into the challenging visible frequencies, we propose an interferometry-type frequency-resolved optical gating (FROG). Our numerical simulation shows that, when operating in a double-pulse scheme, a unique phase-locking mechanism can be activated and preserves both zero- and first-order phases (φ0, φ1)—indispensable for phase-sensitive spectroscopic study—that are otherwise inaccessible to standard FROG measurement. Followed by time-domain signal reconstruction and analysis protocol, we show that time-domain spectroscopy with sub-cycle temporal resolution is enabled and well suits the need of a ultrafast-compatible and ambiguity-free method for complex dielectric function measurement at visible wavelengths.
Funder
National Key Research and Development Program of China
Hong Kong Research Grants Council
National Natural Science Foundation of China
HKUST Research Equipment Competition
Subject
Atomic and Molecular Physics, and Optics