Momentum-dependent intraband high harmonic generation in a photodoped indirect semiconductor

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10483079" target="_blank" >RIV/00216208:11320/24:10483079 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00584821

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yiNJEKwOXG" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yiNJEKwOXG</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s42005-024-01593-x" target="_blank" >10.1038/s42005-024-01593-x</a>

Result language

angličtina

Original language name

Momentum-dependent intraband high harmonic generation in a photodoped indirect semiconductor

Original language description

Nonlinear optical response of solid-state materials exposed to strong non-resonant light fields leads to the generation of harmonic frequencies as a consequence of interband polarization and coherent intraband dynamics of the electrons. The efficient production of a macroscopic wave requires the preservation of the mutual phase between the driving wave and the individual microscopic sources of radiation. Here, we experimentally and theoretically show that the yield of high harmonic generation in a photodoped silicon crystal is enhanced by the nonlinear intraband current whose amplitude depends not only on the volume density of the photogenerated carriers but also on their momentum distributions within the bands. The strongest enhancement is reached when the carrier system is relaxed to the band minima before interacting with the strong nonresonant wave, which drives the high harmonic generation. These results extend the possibilities of high harmonic spectroscopy towards the investigation of ultrafast carrier relaxation in condensed matter. High Harmonic Generation in solids differs with respect to its atomic counterpart due to additional intraband harmonic emissions and to the presence of momentum scattering. The authors demonstrate that the additional intraband contribution depends on the momentum distribution of photodoped carriers when the driving pulse arrives to the sample.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Communications Physics

ISSN

2399-3650

e-ISSN

—

Volume of the periodical

7

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

104

UT code for WoS article

001188874300003

EID of the result in the Scopus database

2-s2.0-85188318859