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Journal of the Optical Society of America B

Trichromatic phase manipulation of optical high-order sidebands in a nanocavity coupled to a single quantum emitter

Jiahua Li, Rong Yu, Wei Wang, Chunling Ding, Ying Wu

Published Jul 16, 2015• 1 citation
Publisher

Abstract

We explore the dependence of optical high-order sideband (HOS) spectra on the incident power and relative phase of a trichromatic driving field in a single-mode nanocavity coupled to a two-level quantum emitter beyond the weak excitation approximation. With state-of-the-art experimental system parameters, it is found that the generated HOS can be enhanced significantly, compared with the bichromatic excitation. By varying the powers and phases of the trichromatic components, a few interesting phenomena such as enhancement, suppression, and quenching of the HOS spectral lines can be achieved. For the phase dependence, it is the sum of relative phases of two sideband components of the trichromatic driving field to the central component that plays a crucial role in generating the HOS. Optical HOS spectra exhibit remarkably different features once the sum phase is changed, but are kept unchanged regardless of the respective phases when the sum phase is fixed. The influence of the other system parameters, including the emitter-cavity coupling strength and all kinds of relative frequency detunings, on optical HOS generation is also discussed in detail. The underlying physical mechanism for optical HOS generation is presented. This investigation may find applications in multimode quantum memories and information processing at a low pump power level using cavity quantum electrodynamics.

DOI
10.1364/josab.32.001660

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We explore the dependence of optical high-order sideband (HOS) spectra on the incident power and relative phase of a trichromatic driving field in a single-mode nanocavity coupled to a two-level quantum emitter beyond the weak excitation approximation. With state-of-the-art experimental system parameters, it is found that the generated HOS can be enhanced significantly, compared with the bichromatic excitation. By varying the powers and phases of the trichromatic components, a few interesting phenomena such as enhancement, suppression, and quenching of the HOS spectral lines can be achieved. For the phase dependence, it is the sum of relative phases of two sideband components of the trichromatic driving field to the central component that plays a crucial role in generating the HOS. Optical HOS spectra exhibit remarkably different features once the sum phase is changed, but are kept unchanged regardless of the respective phases when the sum phase is fixed. The influence of the other system parameters, including the emitter-cavity coupling strength and all kinds of relative frequency detunings, on optical HOS generation is also discussed in detail. The underlying physical mechanism for optical HOS generation is presented. This investigation may find applications in multimode quantum memories and information processing at a low pump power level using cavity quantum electrodynamics.
It is quite important to enhance and control the optomechanically induced high-order sideband generation to achieve low-power optical comb and high-sensitivity sensing with an integrable structure. Here we present and analyze a proposal for enhancement and manipulation of optical nonlinearity and high-order sideband generation in a hybrid atom-cavity optomechanical system that is coherently driven by a bichromatic input field consisting of a control field and a probe field and that works beyond the perturbative regime. Our numerical analysis with experimentally achievable parameters confirms that robust high-order sideband generation and typical spectral structures with nonperturbative features can be created even under weak driven fields. The dependence of the high-order sideband generation on the atomic parameters are also discussed in detail, including the decay rate of the atoms and the coupling parameter between the atoms and the cavity field. We show that the cutoff order as well as the amplitude of the higher-order sidebands can be well tuned by the atomic coupling strength and the atomic decay rate. The proposed mechanism of enhancing optical nonlinearity is quite general and can be adopted to optomechanical systems with different types of cavity.
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We propose a scheme for high-order sideband generation (HSG) by utilizing strong coupling between a single quantum dot (QD) and a photonic crystal cavity beyond the weak-excitation approximation. Here the hybrid system is coherently driven by an external bichromatic field consisting of a continuous-wave (cw) control field and a cw probe field. We take account of nonlinear terms in the Heisenberg-Langevin equations, i.e., the nonlinear nature of the QD, and give an effective method to deal with such a problem. It is shown, due to the presence of nonlinear terms, that the HSG with large intensities can be realized with experimentally achievable system parameters. This investigation may provide further insight into the understanding of solid-state cavity quantum electrodynamics system and find applications in optical comb and communication in a photonic crystal platform. In addition, the present theory can also be applied to other similar systems, such as a single quantum emitter positioned close to a microtoroidal resonator with the whispering-gallery-mode fields propagating inside the resonator.
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