Abstract
Because of their strong and fast response, the nonlinearities induced by two-photon transitions in semiconductors have been considered for ultrafast all-optical switching.1-3 The switching is efficient, particularly for wavelengths near half the band gap where the nonlinear refractive index, n2, is enhanced by the onset of two-photon absorption. Below the band gap, an important figure of merit related to two-photon absorption is defined by T = 2 β2λ to /n2.4 Here, β2 is the two-photon absorption coefficient and λ is the wavelength in vacuum. T < 1 is the criterion for efficient nonlinear switching. Hence, knowledge of β2 and η2 is important.
© 1993 Optical Society of America
PDF ArticleMore Like This
C. C. Yang, Alain Villeneuve, George Stegeman, Cheng-Hui Lin, Hao-Hsiung Lin, and I-Peng Chiou
MA.2 Nonlinear Guided-Wave Phenomena (NP) 1993
George I. Stegeman, Alain Villeneuve, Peter Wigley, C. C. Yang, Charles Ironside, Stewart Aitchison, and A. H. Kean
QTuN3 Quantum Electronics and Laser Science Conference (CLEO:FS) 1992
M. N. Islam, C. E. Soccolich, R. E. Slusher, and W. S. Hobson
QTuN1 Quantum Electronics and Laser Science Conference (CLEO:FS) 1992