Ultraslow Optical Solitons in a Coupled Double Quantum-Well Nanostructure

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2009,（3）
• 页码范围: 519-523
• 页数: 5页
• 语种: 英文

摘要

We demonstrate the formation of ultraslow dark optical solitons with a four-level scheme in an asymmetric semiconductor double quantum well (SDQW) structure based on intersubband transitions by using only a low-intensity pulsed laser radiation. With appropriate conditions we show numerically that the dark optical soliton can travel with a ultraslow group velocity V9 / c～-10-3. Such a semiconductor system is much more practical than its atomic counterpart because of its ftexible design and the controllable interference strength. This nonlinear optical process in the SDQW solid-state material may be used for the control technology of optical delay lines and optical buffers.