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Schematic illustration of a nano-mechanical optical switch driven by optical gradient force. (b) Cross-sectional view of the free-standing ring resonator and (c) working principle of the switch, with schematic of the spectral response at different switching states.
(a) Simulated spatial displacement of the free-standing ring drive by the optical gradient force and (b) calculated displacement as a function of the ring circumferential position.
(a) Overview of SEM image of the free-standing ring resonator based switch and (b) close-up of the free-standing ring and nano-waveguide.
(a) Experimental results of transmission spectral response of the switch without the control light launching into the ring resonator and (b) zoom-in view of wavelength shift corresponding to the control light in either off-state or on-state.
Switch dynamic response under a 5-MHz modulated light signal: waveforms of the control and output response signals of the switch.
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