Resonantly Trapped Bound State in the Continuum Laser

Abstract

Cavities play a fundamental role in wave phenomena from quantum mechanics to electromagnetism and dictate the spatiotemporal physics of lasers. In general, they are constructed by closing all "doors" through which waves can escape. We report, at room temperature, a bound state in the continuum laser that harnesses optical modes residing in the radiation continuum but nonetheless may possess arbitrarily high quality factors. These counterintuitive cavities are based on resonantly trapped symmetry-compatible modes that destructively interfere. Our experimental demonstration opens exciting avenues towards coherent sources with intriguing topological properties for optical trapping, biological imaging, and quantum communication.

11 pages, 4 figures

References in corpus (2)

• Topological nature of bound states in the radiation continuum
• Formation of long-lived, scarlike modes near avoided resonance crossings in optical microcavities

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