The occurrence of higher-order Fourier components in an originally sinusoidal free-carrier index grating produced in CdS by interference of two picosecond light pulses is demonstrated by simultaneously monitoring the decay of the first- and second-order diffraction intensity of a transparent probe pulse. A pronounced contribution with doubled period can be attributed to an exciton phase grating formed by binding of electrons and holes of the free-carrier grating.
© 1986 Optical Society of America
Original Manuscript: February 6, 1986
Manuscript Accepted: April 1, 1986
Published: June 1, 1986
H. Saito and E. O. Göbel, "Mott-transition-induced period doubling in transient-grating experiments in CdS," Opt. Lett. 11, 354-356 (1986)