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Title: Observation of backward high-harmonic emission from solids

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/OE.26.012210· OSTI ID:1435882

Here, we experimentally demonstrate backward emission of high-harmonics of a near-infrared laser from MgO and Si crystals in the direction of specular reflection. We show that the variation of the high-harmonic power with the angle of incidence can be predicted with nonlinear reflection coefficients derived originally for perturbative nonlinearities. A comparison of transmission and reflection geometries suggests that backward-propagating high-harmonics are an excellent reference to study nonlinear propagation of intense light in solids. Backward emission will enable phase matching of the high-harmonic beam and the integration of the functionalities of extended gas-phase high-harmonic beamlines into a single optical element. The potential to achieve phase matching paves the way to solid-state based high-harmonic sources with higher flux than the best transmission-based sources, where high-harmonics are strongly absorbed by the crystal itself.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
Early Career Research Program; AC02-76SF00515; FA9550-14-1-0108
OSTI ID:
1435882
Alternate ID(s):
OSTI ID: 1458536
Journal Information:
Optics Express, Journal Name: Optics Express Vol. 26 Journal Issue: 9; ISSN 1094-4087
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

References (17)

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Cited By (3)

Interferometry of dipole phase in high harmonics from solids journal December 2018
High-harmonic generation from solids journal November 2018
High-harmonic generation in solids driven by counter-propagating pulses journal January 2019

Figures / Tables (5)


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