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Three-pathway electromagnetically induced transparency in coupled-cavity optomechanical system

2015; Optica Publishing Group; Volume: 23; Issue: 9 Linguagem: Inglês

10.1364/oe.23.011508

1094-4087

Fuchuan Lei, Ming Gao, Chunguang Du, Qingli Jing, Gui‐Lu Long,

Photonic and Optical Devices

Recently Qu and Agarwal [Phys. Rev. A 22, 031802 (2013)] found a three-pathway electromagnetically induced absorption (TEIA) phenomenon within a mechanically coupled two-cavity system, where there exist a sharp EIA dip in the broad electromagnetically induced transparency peak in the transmission spectrum. In this work, we study the response of a probe light in a pair of directly coupled microcavities with one mechanical mode. We find that in addition to the sharp TEIA dip within a broad EIT window as found by Qu and Agarwal, three-pathway electromagnetically induced transparency (TEIT) within the broad EIT window could also exist under certain conditions. We give explicit physical explanations and detailed calculations. Our results provide a method for controlling transition between TEIA and TEIT in coupled optomechanical systems, and reveal the multiple pathways interference is versatile for controlling light.