TITLE

Picosecond dynamics of spin-related optical nonlinearities in In[sub x]Ga[sub 1-x]As multiple quantum wells at 1064 nm

AUTHOR(S)
Jarasiunas, K.; Gudelis, V.; Aleksiejunas, R.; Sudzius, M.; Iwamoto, S.; Nishioka, M.; Shimura, T.; Kuroda, K.; Arakawa, Y.
PUB. DATE
February 2004
SOURCE
Applied Physics Letters;2/16/2004, Vol. 84 Issue 7, p1043
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Light-induced absorption and diffraction measurements of resonantly excited 10-nm-width InGaAs multiple quantum wells have been carried out, using circularly polarized beams at 1064 nm. Spin relaxation time τ[sub s]≃280±15 ps has been determined by monitoring dynamics of light absorption bleaching at 0.04 mJ/cm[sup 2], while a nonlinearly compressed spin component in diffraction varied from 220±20 ps to 115±15 ps with excitation. The kinetics of carrier grating with randomized spins allowed the determination of the bipolar diffusion coefficient D=11.5 cm[sup 2]/s, hole mobility of 230 cm[sup 2]/V s, and carrier lifetime τ[sub R]=0.73–1 ns. © 2004 American Institute of Physics.
ACCESSION #
12202354

 

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