Theoretical ultraslow bright and dark optical solitons in cascade-type GaAs/AlGaAs multiple quantum wells |
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| Authors: | Wei Yan Tao Wang Xiao-Ming Li |
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| Institution: | 1. School of Physics and Electronics, North China University of Water Resources and Electric Power, ZhengZhou, 450045, China;2. College of Information Technology, Shanghai Ocean University, Shanghai 201306, China;1. Departamento de Física, Universidad Católica del Norte, Antofagasta, Chile;2. CREG-National University La Plata-CONICET, C.C. 727, 1900 La Plata, Argentina;3. Instituto Carlos I, Universidad de Granada, Granada, Spain;4. National University La Plata, Physics Institute (IFLP-CCT-CONICET), C.C. 727, 1900 La Plata, Argentina;5. Physics Department and IFISC–CSIC, University of Balearic Islands, 07122, Palma de Mallorca, Spain;1. School of Physics, Northeast Normal University, Changchun 130024, PR China;2. College of Physics, Jilin University, Changchun 130012, PR China;3. College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, PR China |
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| Abstract: | We show the formation of ultraslow bright and dark optical solitons in a cascade-type three-level system of GaAs/AlGaAs multiple quantum wells (MQWs) structure based on the biexciton coherence in the transient optical response, and study analytically and numerically with Maxwell–Schrödinger equations. The calculated velocity of bright and dark optical solitons are Vg = 2.7 × 104 ms? 1 and Vg = 8.91 × 104 ms? 1, respectively. Such investigation of ultraslow optical solitons in MQWs may provide practical applications such as high-fidelity optical delay lines and optical buffers in semiconductor quantum wells structure, because of its flexible design. |
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