In this work, the authors demonstrate the control of quality factor (Q-factor) is laterally coupled vertical cavities. A 3 μm-side-length square cavity directly connected to a 1.5 μm-width, 10 μm-length Fabry–Perot (FP) cavity has been fabricated and measured. Dynamic tuning of the Q-factor has been successfully observed by bringing the square cavity and FP cavity into resonance. The vertical-cavity-based Q-factor control scheme provides a new choice for the modulation of light and holds potentials for applications associated with optical information processing.

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Control of quality factor in laterally coupled vertical cavities

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