Optical absorption spectra and dynamical fractional Stark ladders in semiconductor superlattices
Journal Article
·
· Physical Review B
The optical response of semiconductor heterostructure under a combined dc-ac fields, F{sub dc}+F{sub ac}cos{omega}{sub L}t, is studied by calculating absorption spectra based on semiconductor Bloch equations. First, we investigate the periodic motion of the carrier in a band under a ac field or dc field. Under the ac field with the frequency {omega}{sub L}, we find the periodic motion of {omega}{sub L}, which is very similar to the Bloch oscillation under the dc field. The ladder spacing of quasienergy states under the ac field is observed to be {Dirac_h}{omega}{sub L}. Under combined ac-dc fields, we discover the absorption peaks corresponding to the so-called dynamical fractional Stark ladders with ladder spacing m{Dirac_h}{omega}{sub B}+m{prime}{Dirac_h}{omega}{sub L} where m and m{prime} are integers and {omega}{sub B} is the Bloch oscillation frequency.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40230875
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 7 Vol. 64; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
Similar Records
Inverse Bloch-oscillator: Strong Thz-photocurrent resonances at the Bloch frequency
Experimental and theoretical demonstration of acoustic Bloch oscillations in porous silicon structures
Interference of the Bloch oscillations in the Josephson junctions
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:238901
Experimental and theoretical demonstration of acoustic Bloch oscillations in porous silicon structures
Journal Article
·
Mon Apr 21 00:00:00 EDT 2014
· Journal of Applied Physics
·
OSTI ID:22273577
Interference of the Bloch oscillations in the Josephson junctions
Journal Article
·
Sat Jul 01 00:00:00 EDT 1989
· Journal of Low Temperature Physics; (USA)
·
OSTI ID:6195338