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

Volume

1

fYear

2005

fDate

22-27 May 2005

Firstpage

651

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2005. (CLEO). Conference on

Print_ISBN

1-55752-795-4

Type

conf

DOI

10.1109/CLEO.2005.201877

Filename

1572943