It is well known that there is a bottleneck for nonlinear all-optical switching, namely, the switching power and the switching time cannot be lowered simultaneously. A lower switching power requires a resonator with a high quality ( $Q$ ) factor, but leads to a longer switching time. We propose to overcome this bottleneck by replacing the nonlinear cavity in such an all-optical switch by a white-light cavity. This can be done by doping three-level atoms in the ring resonator and applying incoherent pump and coherent driving fields on it. The white-light cavity possesses broadband resonance in a linear region. Therefore, for the incident pulse, a broad range of frequency components can take part in the nonlinear process, and so it requires lower power to achieve switching compared to the conventional ring resonator. On the other hand, the refractive index of a white-light cavity has negative dispersion, leading to a fast group velocity. This results in a shorter time to build up the resonant response, yielding a short switching time.It is well known that there is a bottleneck for nonlinear all-optical switching, namely, the switching power and the switching time cannot be lowered simultaneously. A lower switching power requires a resonator with a high quality ($Q$) factor, but leads to a longer switching time. We propose to overcome this bottleneck by replacing the nonlinear cavity in such an all-optical switch by a white-light cavity. This can be done by doping three-level atoms in the ring resonator and applying incoherent pump and coherent driving fields on it. The white-light cavity possesses broadband resonance in a linear region. Therefore, for the incident pulse, a broad range of frequency components can take part in the nonlinear process, and so it requires lower power to achieve switching compared to the conventional ring resonator. On the other hand, the refractive index of a white-light cavity has negative dispersion, leading to a fast group velocity. This results in a shorter time to build up the resonant response, yielding a short switching time.

Physical Review AApr 12, 201619 citations

On Resonance

Shachar Klaiman, Ido Gilary

Advances in quantum chemistryJan 1, 201236 citations

Recoil-induced resonances for optical switching

K. Gordon, S. A. DeSavage, D. Duncan +3 more

We have investigated recoil-induced resonances in laser-cooled atoms for the purpose of developing an optical switch. In contrast to our earlier experiments Citation8, we employ a system in which the trapping beams are left on during the course of the measurement. We not only find the expected narrow resonance but also a much wider resonance. The widths of the wide and narrow resonances differ by three orders of magnitude. In addition, the two resonances show different temporal dynamics. We explore the utility of each resonance as an optical switch.We have investigated recoil-induced resonances in laser-cooled atoms for the purpose of developing an optical switch. In contrast to our earlier experiments Citation8, we employ a system in which the trapping beams are left on during the course of the measurement. We not only find the expected narrow resonance but also a much wider resonance. The widths of the wide and narrow resonances differ by three orders of magnitude. In addition, the two resonances show different temporal dynamics. We explore the utility of each resonance as an optical switch.

Journal of Modern OpticsNov 10, 20105 citations

Resonances

Stephen J. Gustafson, Israel Michael Sigal

UniversitextJan 1, 20030 citations

Resonance control

Mikhail A. Noginov

Nature PhotonicsJun 30, 20085 citations

Quantum switch in coupled-resonator array: Controlling single-photon transport by the state of two-level system

Xiao-Ke Qin

We present the model that two-level system (TLS) nonlocally interacts with one-dimensional coupled-resonator array (CRA). The coherent transport of single-photon inside CRA is well controlled by the state of TLS, which functions as quantum switch. Spin up and spin down correspond to switch on and switch off respectively, or vice versa, which originate from the constructive interference and the destructive interference of two coupling paths. We improve the fidelity of quantum switch by preadjusting the frequency of resonators which couple to TLS. Quantum switch realizes quantum beam splitter when TLS is in the superposition state. The single-photon wave packet would entangle with qubit and propagate to the remote resonators.We present the model that two-level system (TLS) nonlocally interacts with one-dimensional coupled-resonator array (CRA). The coherent transport of single-photon inside CRA is well controlled by the state of TLS, which functions as quantum switch. Spin up and spin down correspond to switch on and switch off respectively, or vice versa, which originate from the constructive interference and the destructive interference of two coupling paths. We improve the fidelity of quantum switch by preadjusting the frequency of resonators which couple to TLS. Quantum switch realizes quantum beam splitter when TLS is in the superposition state. The single-photon wave packet would entangle with qubit and propagate to the remote resonators.

International Journal of Modern Physics BDec 29, 20152 citations

Q

) factor, but leads to a longer switching time. We propose to overcome this bottleneck by replacing the nonlinear cavity in such an all-optical switch by a white-light cavity. This can be done by doping three-level atoms in the ring resonator and applying incoherent pump and coherent driving fields on it. The white-light cavity possesses broadband resonance in a linear region. Therefore, for the incident pulse, a broad range of frequency components can take part in the nonlinear process, and so it requires lower power to achieve switching compared to the conventional ring resonator. On the other hand, the refractive index of a white-light cavity has negative dispersion, leading to a fast group velocity. This results in a shorter time to build up the resonant response, yielding a short switching time.