Optical precursors with tunneling-induced transparency in asymmetric quantum wells

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.013812· OSTI ID:21537054

Yandong, Peng; Yihong, Qi; Haifeng, Yao ^[1]; Yueping, Niu ^[1]; Shangqing, Gong ^[1]

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1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)

A scheme for separating optical precursors from a square-modulated laser pulse through an asymmetric double Al{sub x}Ga{sub 1-x}As/GaAs quantum-well structure via resonant tunneling is proposed. Destructive interference inhibits linear absorption, and a tunneling-induced transparency (TIT) window appears with normal dispersion, which delays the main pulse; then optical precursors are obtained. Due to resonant tunneling, constructive interference for nonlinear susceptibility is created. The enhanced dispersion in a narrow TIT window is about one order of magnitude larger than that of the linear case. In this case, the main pulse is much delayed and the precursor signals are easier to obtain. Moreover, the main pulse builds up due to the gain introduced by the enhanced cross-nonlinearity.

• OSTI ID: 21537054
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
DISPERSIONS
ELECTROMAGNETIC RADIATION
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
INTERFERENCE
LASER RADIATION
NANOSTRUCTURES
NONLINEAR PROBLEMS
OPTICAL DISPERSION
PNICTIDES
PULSES
QUANTUM WELLS
RADIATIONS
SIGNALS
SORPTION
TUNNEL EFFECT