A. Yulaev, Sangsik Kim, Qing Li, D. Westly, B. Roxworthy, K. Srinivasan, V. Aksyuk
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Exceptional Points in Photonic Grating Band Diagrams Lead to Decay-Free Radiation
We demonstrate that exceptional points in a photonic band diagram lead to constant-intensity free-space beams projected from grating couplers. Our findings pave the way for projecting spatially broad free-space beams with decay-free profiles.