We demonstrate the formation of ultraslow dark semiconductor double quantum well （SDQW） structure based optical solitons with a four-level scheme in an asymmetric on intersubband transitions by using only a low-inte...We demonstrate the formation of ultraslow dark semiconductor double quantum well （SDQW） structure based optical solitons with a four-level scheme in an asymmetric 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 Vg/c - -10^-3. Such a semiconductor system is much more practical than its atomic counterpart because of its flexible 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.展开更多
We investigate the formation of optical bistability （OB） in a crystal of molecular magnets contained in a unidirectional ring cavity. The crystal is subjected to one dc magnetic field and two （probe and coupling） ...We investigate the formation of optical bistability （OB） in a crystal of molecular magnets contained in a unidirectional ring cavity. The crystal is subjected to one dc magnetic field and two （probe and coupling） ac resonant magnetic field. The results show that OB can be controlled efficiently by adjusting the intensity of the control field, the detuning of probe magnetic field and the cooperation parameter, Furthermore, within certain parameter range, the optical multistablity （OM） can also be observed in the crystal medimn. This＇ investigation can be used for designing new types of nonelectronic devices for realizing switching process.展开更多
基金supported in part by the National Natural Science Foundation of China under Grant Nos.10575040.90503010.10634060,and 10747133the National Basic Research Program of China under Grant No.2005CB724508
文摘We demonstrate the formation of ultraslow dark semiconductor double quantum well （SDQW） structure based optical solitons with a four-level scheme in an asymmetric 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 Vg/c - -10^-3. Such a semiconductor system is much more practical than its atomic counterpart because of its flexible 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.
基金National Natural Science Foundation of China under Grant Nos.10575040,90503010,and 10747133
文摘We investigate the formation of optical bistability （OB） in a crystal of molecular magnets contained in a unidirectional ring cavity. The crystal is subjected to one dc magnetic field and two （probe and coupling） ac resonant magnetic field. The results show that OB can be controlled efficiently by adjusting the intensity of the control field, the detuning of probe magnetic field and the cooperation parameter, Furthermore, within certain parameter range, the optical multistablity （OM） can also be observed in the crystal medimn. This＇ investigation can be used for designing new types of nonelectronic devices for realizing switching process.
