Back to Search Start Over

Dual-Wavelength Spectrum-Shaped Mid-Infrared Pulses and Steering High-Harmonic Generation in Solids

Authors :
Linzhen He
Weizhe Wang
Kan Tian
Maoxing Xiang
Zhongjun Wan
Bo Hu
Yang Li
Han Wu
Zi-Yu Chen
Fan Yang
Houkun Liang
Source :
Ultrafast Science, Vol 3 (2023)
Publication Year :
2023
Publisher :
American Association for the Advancement of Science (AAAS), 2023.

Abstract

Mid-infrared (MIR) ultra-short pulses with multiple spectral-band coverage and good freedom in spectral and temporal shaping are desired by broad applications such as steering strong-field ionization, investigating bound-electron dynamics, and minimally invasive tissue ablation. However, the existing methods of light transient generation lack freedom in spectral tuning and require sophisticated apparatus for complicated phase and noise control. Here, with both numerical analysis and experimental demonstration, we report the first attempt, to the best our knowledge, at generating MIR pulses with dual-wavelength spectral shaping and exceptional freedom of tunability in both the lasing wavelength and relative spectral amplitudes, based on a relatively simple and compact apparatus compared to traditional pulse synthesizers. The proof-of-concept demonstration in steering the high-harmonic generation in a polycrystalline ZnSe plate is facilitated by dual-wavelength MIR pulses shaped in both spectral and temporal domains, spanning from 5.6 to 11.4 μm, with multi-microjoule pulse energy and hundred- milliwatt average power. Multisets of harmonics corresponding to different fundamental wavelengths are simultaneously generated in the deep ultraviolet region, and both the relative strength of individual harmonics sets and the spectral shapes of harmonics are harnessed with remarkable freedom and flexibility. This work would open new possibilities in exploring femtosecond control of electron dynamics and light–matter interaction in composite molecular systems.

Details

Language :
English
ISSN :
27658791
Volume :
3
Database :
Directory of Open Access Journals
Journal :
Ultrafast Science
Publication Type :
Academic Journal
Accession number :
edsdoj.7fc4025b8ed4d5fbe58bcd0908dbabe
Document Type :
article
Full Text :
https://doi.org/10.34133/ultrafastscience.0022