ULTRAVIOLET FREQUENCY COMBS AND ATTOSECOND NONLINEAR OPTICS WITH FEW-CYCLE PULSES
Abstract
This work will study the generation of high harmonic frequency combs in solid-state media with coverage at ultraviolet (UV) wavelengths shorter than 100 nm. This will be accomplished with the development of a unique 1550 nm frequency comb source of <10 fs pulses with 100 nJ energy at 100 MHz that can be focused to peak intensities in excess of 10 TW/cm2. The few-cycle nature of the source will allow us to study the dependence of harmonic generation on the carrier envelope phase (CEP) of the driving pulses, which we will use to study the highly nonlinear process itself, as well as to generate greater fluxes at the highest photon energies. These studies will leverage a unique measurement approach, with radio-frequency sensitivity having >85 dB dynamic range to probe the CEP modulations, their wavelength dependence, and the relative phase of the UV emission itself. With these tools we will investigate the possibility of a solid-state source of high repetition rate attosecond pulses and their corresponding ultra-broadband frequency comb. Such a compact and convenient solid-state source of coherent UV radiation will be extremely compelling for multiple applications in optical clocks, microscopy, fundamental spectroscopy, and materials and quantum science. As a first application, we will use this unique source to study and optimize harmonic generation for high-resolution dual-comb spectroscopy at wavelengths significantly shorter than ever demonstrated. Dual-comb spectroscopy with two such UV frequency combs will be applied to the study of gases important for atmospheric science.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA95502210483
Entities
People
- Scott A. Diddams
Organizations
- Air Force Office of Scientific Research
- Regents of the University of Colorado
- United States Air Force