Hot-carrier transport governed optical nonlinearities in dc-biased GaAs crystals

Irmantas Kasalynas; Liudvikas Subacius; Ramunas Aleksiejunas; Kestutis Jarasiunas

doi:10.1117/12.515804

8 August 2003 Hot-carrier transport governed optical nonlinearities in dc-biased GaAs crystals

Irmantas Kasalynas, Liudvikas Subacius, Ramunas Aleksiejunas, Kestutis Jarasiunas

Proceedings Volume 5122, Advanced Organic and Inorganic Optical Materials; (2003) https://doi.org/10.1117/12.515804
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

Hot carrier dynamics and related optical nonlinearities, which arise in dc-biased GaAs under spatially varying optical illumination, have been investigated using light diffraction on transient grating technique. Under dc-bias, time resolved four-wave mixing measurements had evidenced an oscillatory behavior and increased efficiency of light diffraction. The effect was found the largest at illumination intensity corresponding to the electron density between 10¹⁵ cm^-3 and 10¹⁶ cm^-3. Numerical modeling of nonlinear transport at various applied dc-voltages and photoexcitation levels revealed conditions for an efficient and fast refractive index modulation by a transient high-field domain grating. Experimental obervations have been explained in terms of nonuniform carrier heating and formation of transient Gunn-domain grating in the region of negative differential resistance. Our results open the possibility of measuring hot-carrier picosecond dynamics and predict a novel way of fast refractive index modulation in dc-biased compound semiconductors.

Citation Download Citation

Irmantas Kasalynas, Liudvikas Subacius, Ramunas Aleksiejunas, and Kestutis Jarasiunas "Hot-carrier transport governed optical nonlinearities in dc-biased GaAs crystals", Proc. SPIE 5122, Advanced Organic and Inorganic Optical Materials, (8 August 2003); https://doi.org/10.1117/12.515804

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