Long-range coupling and phase locking of several 10-element resonant antiguided arrays via (lateral) radiation leakage is demonstrated. Coupling occurs for interarray separations as large as 90 μm, as evidenced from far-field patterns and spectrally resolved near-field patterns. Diffraction-limited-beam operation is achieved from a 244-μm aperture (four coupled 10-element arrays) device. Intermodal discrimination between the in-phase mode and adjacent higher-order modes is shown to be maximized for a resonant ensemble.
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Mawst et al. (1991) studied this question.
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