Transient-mode excitation, terahertz generation and wavelength shifting in a photonic band gap
A. Di Falco, C. Conti, and G. Assanto
Appl. Phys. B 81, 415-420 (2005)
Abstract:Dynamic responses of photonic crystal microcavities
in nonlinear media are analyzed via both a finitedifference
code and coupled-mode theory in the time domain.
Optical frequency generation in both second- and third-order
nonlinear materials is demonstrated based on the transient
evolution of cavity modes. Terahertz waves can be generated
in quadratically nonlinear crystals by optical rectification,
whereas state generation inside the band gap can be linked to
a Rabi-like splitting in cubic media. An all-optical ultra-fast
wavelength shifter is proposed.