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Physical Review A

Tunable three-wave-mixing-induced transparency

Y. H. Zhou, H. Z. Shen, X. Y. Luo, Y. Wang, Fan Gao, Chun Yu Xin

Published Dec 11, 2017• 8 citations
Publisher

Abstract

The induced transparency was proposed recently in X. Guo et al. [Phys. Rev. Lett. 117, 123902 (2016)] based on a three-wave mixing system. In this paper, we find the double- and multitransparency window can also be observed in this system. The zero-absorption point and profile of the transparency window and the transform of single- and double-transparency window can be controlled by only adjusting the detunings between the laser and the corresponding cavity modes, which is different from the previous studies. A practical application of the three-wave-mixing-induced transparency is to measure the nonlinear coefficient, and the controllable absorption profiles can be employed to engineer a high quality factor of the cavity.

DOI
10.1103/physreva.96.063815

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The induced transparency was proposed recently in X. Guo et al. [Phys. Rev. Lett. 117, 123902 (2016)] based on a three-wave mixing system. In this paper, we find the double- and multitransparency window can also be observed in this system. The zero-absorption point and profile of the transparency window and the transform of single- and double-transparency window can be controlled by only adjusting the detunings between the laser and the corresponding cavity modes, which is different from the previous studies. A practical application of the three-wave-mixing-induced transparency is to measure the nonlinear coefficient, and the controllable absorption profiles can be employed to engineer a high quality factor of the cavity.
We theoretically study the effect of Kerr effect on the second-order nonlinearity induced transparency in a double-resonant optical cavity system. We show that in the presence of the Kerr effect, as the strength of the Kerr effect increases, the absorption curve exhibits an asymmetric-symmetric-asymmetric transition, and the zero absorption point shifts with the increase of the Kerr effect. Furthermore, by changing the strength of the Kerr effect, we can control the width of the transparent window, and the position of the zero-absorption point and meanwhile change the left and right width of the absorption peak. The asymmetry absorption curve can be employed to improve the quality factor of the cavity when the frequency detuning is tuned to be around the right peak. The simple dependence of the zero-absorption point on the strength of Kerr effect suggests that the strength of Kerr effect can be measured by measuring the position of the zero-absorption point in a possible application.
Electromagnetically induced transparency has the unique ability to optically control transparency windows with low light in atomic systems. However, its practical applications in quantum physics and information science are limited due to rigid experimental requirements. Here, we demonstrate a new mechanism of optically induced transparency in a micro-cavity by introducing a four-wave mixing gain to nonlinearly couple two separated resonances of the micro-cavity in an ambient environment. A signature Fano-like resonance was observed owing to the nonlinear interference of the two coupled resonances. Moreover, we show that the unidirectional gain of the four-wave mixing can lead to the remarkable effect of non-reciprocal transmission at the transparency windows. Optically induced transparency may offer a unique platform for a compact, integrated solution to all-optical and quantum information.
Light-matter-light interactions serve as the backbone technology of all-optical information processing for both on-chip and long-haul communication purposes. The representative example of electromagnetically induced transparency has its unique ability of optically controlling transparency windows with relative low light in atomic systems, though its practical applications are limited due to rigid experimental requirements. Here we demonstrate a new form of optically induced transparency in a micro-cavity by introducing four-wave mixing gain in order to couple nonlinearly two separated resonances of the micro-cavity in ambient environment. A signature Fano-like resonance is also observed owing to the nonlinear interference of two coupled resonances. Moreover, we show that the unidirectional gain of four-wave mixing can lead to non-reciprocal transmission at the transparency windows. Optically induced transparency may offer a unique platform for a compact, integrated solution to all-optical processing and quantum information.
Electromagnetically induced transparency has the unique ability to optically control transparency windows with low light in atomic systems. However, its practical applications in quantum physics and information science are limited due to rigid experimental requirements. Here we demonstrate a new mechanism of optically induced transparency in a micro-cavity by introducing a four-wave mixing gain to nonlinearly couple two separated resonances of the micro-cavity in an ambient environment. A signature Fano-like resonance was observed owing to the nonlinear interference of the two coupled resonances. Moreover, we show that the unidirectional gain of the four-wave mixing can lead to the remarkable effect of non-reciprocal transmission at the transparency windows. Optically induced transparency may offer a unique platform for a compact, integrated solution to all-optical and quantum information. Scientists have used light to make a micro-cavity transparent to light, which may lead to compact components for all-optical processing. Since its discovery in 1991, the phenomenon of electromagnetically induced transparency in atomic systems has generated much excitement due to its potential for all-optical and quantum information processing. But it is hard to incorporate in chips because it generally uses atoms in the gaseous phase. Now, Wenjie Wan at Shanghai Jiao Tong University in China and co-workers in China and the United States have realized the equivalent effect—optically induced transparency (OIT) —in a micro-cavity by using a nonlinear optical effect known as four-wave mixing. The researchers anticipate that OIT may offer a new avenue for compact all-optical and quantum information processing.
We propose a three-cavity coupled cavity optomechanical (COM) structure with tunable system parameters and theoretically investigate the probe-light transmission rate. Numerical calculation of the system’s spectra demonstrates distinctive compound-induced transparency (CIT) characteristics, including multiple transparency windows and sideband dips, which can be explained by a coupling between optomechanically-induced transparency (OMIT) and electromagnetically-induced transparency. The effects of optical loss (gain) in the cavity, number and topology of active cavity, tunneling ratio, and pump laser power on the CIT spectrum are evaluated and analyzed. Moreover, the optical group delay of CIT is highly controllable and fast–slow light inter-transition can be achieved. The proposed structure makes possible the advantageous tuning freedom and provides a potential platform for controlling light propagation and fast–slow light switching.