Title :
Optical nonlinearities in CdTe quantum-dot doped glass for optical switching
Author :
Padilha, Lazaro A. ; Fu, Jie ; Hagan, David J. ; Van Stryland, Eric W. ; Cesar, Carlos L. ; Barbosa, Luiz C. ; Brito-Cruz, Carlos H.
Author_Institution :
Coll. of Opt. & Photonics, Central Florida Univ., Orlando, FL, USA
Abstract :
We have studied the nonlinear absorption and refractive index in CdTe quantum dots in glass. We find that the nonlinearities differ from those of bulk CdTe. An ultrafast polarization-rotation switch with on-off ratio of 42:1 is demonstrated. We showed that quantum confinement lowers the two-photon absorption coefficient and raises the nonlinear refraction index, both of which are good for all-optical switching devices.
Keywords :
II-VI semiconductors; absorption coefficients; cadmium compounds; high-speed optical techniques; optical Kerr effect; optical glass; optical switches; refractive index; semiconductor quantum dots; two-photon processes; all-optical switching device; glass; nonlinear absorption; nonlinear refraction index; optical Kerr effect; refractive index; semiconductor quantum dots; two-photon absorption coefficient; ultrafast polarization-rotation switch; Absorption; Glass; Nonlinear optics; Optical polarization; Optical refraction; Optical switches; Optical variables control; Quantum dots; Refractive index; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics, 2005. (CLEO). Conference on
Print_ISBN :
1-55752-795-4
DOI :
10.1109/CLEO.2005.201877
