Non-trivial scaling of self-phase modulation and three-photon absorption in III-V photonic crystal waveguides.
We investigate the nonlinear response of photonic crystal waveguides with suppressed two-photon absorption. A moderate decrease of the group velocity (approximately c/6 to c/15, a factor of 2.5) results in a dramatic (x 30) enhancement of three-photon absorption well beyond the expected scaling, proportional, variant 1/v3g. This non-trivial scaling of the effective nonlinear coefficients results from pulse compression, which further enhances the optical field beyond that of purely slow-group velocity interactions. These observations are enabled in mm-long slow-light photonic crystal waveguides owing to the strong anomalous group-velocity dispersion and positive chirp. Our numerical physical model matches measurements remarkably.
Husko
Chad
C
1Thales Research and Technology, Route Départementale 128, 91767 Palaiseau, France. cah2116@columbia.edu
Combrié
Sylvain
S
Tran
Quynh V
QV
Raineri
Fabrice
F
Wong
Chee Wei
CW
De Rossi
Alfredo
A
D017076:Computer-Aided Design; D003460:Crystallization; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D008027:Light; D017711:Nonlinear Dynamics; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation