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- Title
Ultrashort-laser electron–hole plasma and intragap states in diamond.
- Authors
Krasin, G. K.; Kudryashov, S. I.; Danilov, P. A.; Smirnov, N. A.; Levchenko, A. O.; Kovalev, M. S.
- 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.
- Subjects
SOLID-state plasmas; FEMTOSECOND pulses; ULTRASHORT laser pulses; DIAMONDS; PLASMA materials processing; LUMINESCENCE; PHOTONS
- Publication
European Physical Journal D (EPJ D), 2021, Vol 75, Issue 8, p1
- ISSN
1434-6060
- Publication type
Article
- DOI
10.1140/epjd/s10053-021-00234-0