Chinese Optics Letters, 2009, 7 (10): 886, Published Online: Oct. 16, 2009
Tunneling-induced \pi-phase shift with a single-photon signal field in asymmetric double quantum wells Download: 568次
双量子阱结构 相位匹配 交叉相位调制 共振隧穿诱导透明 190.3270 Kerr effect 190.4400 Nonlinear optics, materials 270.1670 Coherent optical effects 270.5585 Quantum information and processing
Abstract
A theoretical investigation is carried out into the cross phase modulation (XPM) in an asymmetric double AlGaAs/GaAs quantum wells structure with a common continuum. It is found that, combining resonant tunneling-induced transparency and constructive interference in the third-order Kerr effect, a giant XPM can be achieved with vanishing linear and nonlinear absorptions, accompanied by the velocities of the probe and signal fields being matched. Furthermore, this giant XPM could induce a \pi-phase shift at a single-photon level which is favorable for the applications in two-qubit quantum logic gates.
Hongju Guo, Lichun Wang, Yueping Niu, Shiqi Jin, Shangqing Gong. Tunneling-induced \pi-phase shift with a single-photon signal field in asymmetric double quantum wells[J]. Chinese Optics Letters, 2009, 7(10): 886.