Title :
Nonlinear optical properties of AlGaAs/GaAs multiple quantum well due to two-photon transitions between bound-to-continuum states
Author :
Khurgin, Jacob ; Kang, Jin U. ; Yang, C.C. ; Lin, H.H. ; Stegeman, George I.
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
Abstract :
We have measured the anisotropic two photon absorption (TPA) of AlGaAs-GaAs MQW that exhibits a two-photon transition from confined-to-continuum states. We also have measured the anisotropic nonlinear refractive indices of AlGaAs-GaAs MQW. From the inspection of the TPA spectra and fitting the data, we found that the excitons resulting from two-photon transitions from confined-to-continuum states exhibit reduced binding energies and this is in good agreement with the theory
Keywords :
III-V semiconductors; absorption coefficients; aluminium compounds; binding energy; excitons; gallium arsenide; nonlinear optics; refractive index; semiconductor quantum wells; two-photon spectra; AlGaAs-GaAs; AlGaAs-GaAs MQW; AlGaAs/GaAs multiple quantum well; TPA spectra; anisotropic nonlinear refractive indices; anisotropic two photon absorption; bound-to-continuum states; confined-to-continuum states; excitons; nonlinear optical properties; reduced binding energies; two-photon transition; two-photon transitions; Absorption; Anisotropic magnetoresistance; Excitons; Gallium arsenide; Geometrical optics; Inspection; Nonlinear optics; Optical refraction; Optical variables control; Quantum well devices;
Conference_Titel :
Nonlinear Optics '98: Materials, Fundamentals and Applications Topical Meeting
Conference_Location :
Kauai, HI
Print_ISBN :
0-7803-4950-4
DOI :
10.1109/NLO.1998.710252
