Ultrashort-laser electron–hole plasma and intragap states in diamond

Autor:	M. S. Kovalev, G. K. Krasin, A. O. Levchenko, Sergey I. Kudryashov, Pavel Danilov, Nikita Smirnov
Rok vydání:	2021
Předmět:	Materials science Optical physics Physics::Optics Diamond Electron hole Plasma engineering.material Laser Atomic and Molecular Physics and Optics law.invention law engineering Atomic physics Luminescence Ultrashort pulse Excitation
Zdroj:	The European Physical Journal D. 75
ISSN:	1434-6079 1434-6060
DOI:	10.1140/epjd/s10053-021-00234-0
Popis:	Abstract The article discusses the implementation of ultrafast broadband excitation of A-band luminescence of natural diamond by femtosecond-laser pulses with low-energy near-IR photons. Such regime provides A-band luminescence yield with the fourth-power nonlinearity at low laser intensities and second-power nonlinearity at higher laser intensities. These nonlinear dependences of A-band intensity on laser intensity can be related to quasi-resonant four-photon excitation at lower laser intensities and impact excitation of corresponding optical centers at higher intensities, or to similar nonlinear processes in electron–hole plasma relaxing to trapping donor-acceptor centers. Graphic abstract
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c810bbade17ff79a400a442142e5bff1 https://doi.org/10.1140/epjd/s10053-021-00234-0 Zobrazit plný text záznamu Full text from SpringerLink