Logo Logo
Switch Language to German

Qasim, Muhammad; Zimin, Dmitry A. and Yakovlev, Vladislav S. (2021): Optical Gain in Solids after Ultrafast Strong-Field Excitation. In: Physical Review Letters, Vol. 127, No. 8, 87401

Full text not available from 'Open Access LMU'.


Multiphoton excitation of a solid by a few-cycle, intense laser pulse forms a very nonequilibrium distribution of charge carriers, where occupation probabilities do not necessarily decrease with energy. Within a fraction of the pulse, significant population inversion can emerge between pairs of valence-band states with a dipole-allowed transition between them. This population inversion leads to stimulated emission in a laser-excited solid at frequencies where the unperturbed solid is transparent. We establish the optimal conditions for observing this kind of strong-field-induced optical gain.

Actions (login required)

View Item View Item