Photomodulation dynamics of exciton reflectance in GaAs/AlAs single-quantum-well structures

J. Kavaliauskas; B. Cechavicius; G. Krivaite; A. Galickas; V. I. Kadushkin; E. L. Shangina; Ju N. Gorbunova

doi:10.1117/12.417596

8 March 2001 Photomodulation dynamics of exciton reflectance in GaAs/AlAs single-quantum-well structures

J. Kavaliauskas, B. Cechavicius, G. Krivaite, A. Galickas, V. I. Kadushkin, E. L. Shangina, Ju N. Gorbunova

Proceedings Volume 4318, Smart Optical Inorganic Structures and Devices; (2001) https://doi.org/10.1117/12.417596
Event: Advanced Optical Materials and Devices, 2000, Vilnius, United States

Abstract

The excitation-energy dependences and relaxation times of photoinduced changes of excitonic lines in type-I GaAs/AlAs QW structures are studied by the photo- and wavelength- modulated reflectance spectroscopies. The optical data indicate that photoinduced broadening/quenching of excitonic lines dominates in the modulation spectra under photoexcitation within the QW by He-Ne laser. It was found that characteristic time of these photoinduced changes varies form milliseconds at 300 K to seconds at 120 K and reduces under illumination above the AlAs band gap. Moreover, different time constants and their temperature dependences were obtained for QW- and buffer layer-related optical features. It was suggested that photoinduced changes of excitonic spectra could be associated with the T- X electron transfer effects and creation of excess holes in the QW under He-Ne excitation.

Citation Download Citation

J. Kavaliauskas, B. Cechavicius, G. Krivaite, A. Galickas, V. I. Kadushkin, E. L. Shangina, and Ju N. Gorbunova "Photomodulation dynamics of exciton reflectance in GaAs/AlAs single-quantum-well structures", Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); https://doi.org/10.1117/12.417596

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available