Issue
EPL
Volume 83, Number 1, July 2008
Article Number 14002
Number of page(s) 6
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI http://dx.doi.org/10.1209/0295-5075/83/14002
Published online 12 June 2008
EPL, 83 (2008) 14002
DOI: 10.1209/0295-5075/83/14002

Slow optical solitons via intersubband transitions in a semiconductor quantum well

Wen-Xing Yang1, 2 and Ray-Kuang Lee1

1  Institute of Photonics Technologies, National Tsing-Hua University - Hsinchu 300, Taiwan
2  Department of Physics, Southeast University - Nanjing 210096, China

wxyang@mx.nthu.edu.tw

received 12 March 2008; accepted in final form 14 May 2008; published July 2008
published online 12 June 2008

Abstract
We show the formation of bright and dark slow optical solitons based on intersubband transitions in a semiconductor quantum well (SQW). Using the coupled Schrödinger-Maxwell approach, we provide both analytical and numerical results. Such a nonlinear optical process may be used for the control technology of optical delay lines and optical buffers in the SQW solid-state system. With appropriate parameters, we also show the generation of a large cross-phase modulation (XPM). Since the intersubband energy level can be easily tuned by an external bias voltage, the present investigation may open possibilities for electrically controlled phase modulators in solid systems.

PACS
42.50.Gy - Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption.
42.65.Tg - Optical solitons; nonlinear guided waves.
78.67.De - Quantum wells.

© EPLA 2008