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(Color online) (a) Top-view optical image of a free microdisk resonator coupled with a microtoroid via a fiber taper. (b) Simulation results of three available modes supported by the silica fiber taper (with 1550 nm wavelength band laser input) with waist diameter of ∼1.3 μm. The red arrows indicate the directions of the optical electric field inside and outside the fiber taper.
(Color online) (a) Transmission spectra of the individual microdisk (a), microtoroid (b), and the microdisk-microtoroid coupling system (c).
(Color online) Transmission spectra around mode 1 (a) and 3 (b) with various distances between the two microresonators.
(Color online) Transmission minima of mode 1 depending on the distance change ΔL, in which the red dots represent the experimental results.
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