Conical harmonic generation in isotropic materials.
A novel class of nonlinear optical processes is described in which radiation at the nth harmonic is generated through the use of a (2n+1)-order nonlinearity. Utilizing an odd-order nonlinearity, this process allows for the generation and amplification of both odd- and even-order harmonics in isotropic materials. Additionally, this process can always be phase matched in normal-dispersion materials without the use of birefringence. Experimental results are presented in which conical third-harmonic emission is generated from a sapphire sample.
Moll
K D
KD
School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
Homoelle
D
D
Gaeta
Alexander L
AL
Boyd
Robert W
RW