We present an efficient design for direct coupling between a spiral-shaped and a semicircle-shaped microcavity (μ-cavity) as an alternative to traditional evanescent wave coupling for planar integrated photonic technology. We observe the preservation of the high Q-value of the spiral oscillator when coupled to a semicircle under current injection using an single-quantum-well heterostructure. With slight alterations to the directly coupled μ-cavity configuration, such as coupling shape and overlap distance, the number of observed modes and output intensity are changed. and spiral-shaped microcavities have unidirectional emission normal to the spiral notch.
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