Gansch, RomanKalchmair, StefanGenevet, PatriceZederbauer, TobiasDetz, HermannAndrews, Aaron M.Schrenk, WernerCapasso, FedericoLončar, MarkoStrasser, Gottfried2019-09-172016Gansch, Roman, Stefan Kalchmair, Patrice Genevet, Tobias Zederbauer, Hermann Detz, Aaron M Andrews, Werner Schrenk, Federico Capasso, Marko Lončar, and Gottfried Strasser. 2016. “Measurement of Bound States in the Continuum by a Detector Embedded in a Photonic Crystal.” Light: Science & Applications 5 (9): e16147–e16147. https://doi.org/10.1038/lsa.2016.147.2047-75382095-5545http://nrs.harvard.edu/urn-3:HUL.InstRepos:41371515We directly measure optical bound states in the continuum (BICs) by embedding a photodetector into a photonic crystal slab. The BICs observed in our experiment are the result of accidental phase matching between incident, reflected and in-plane waves at seemingly random wave vectors in the photonic band structure. Our measurements were confirmed through a rigorously coupled-wave analysis simulation in conjunction with temporal coupled mode theory. Polarization mixing between photonic crystal slab modes was observed and described using a plane wave expansion simulation. The ability to probe the field intensity inside the photonic crystal and thereby to directly measure BICs represents a milestone in the development of integrated opto-electronic devices based on BICs.en-USJournal Article2019-09-1710.1038/lsa.2016.147