@article{11a68517e1b34df6a736df9ef5a8e346,
title = "Spatially Shaping Waves to Penetrate Deep inside a Forbidden Gap",
abstract = "It is well known that waves with frequencies within the forbidden gap inside a crystal are transported only over a limited distance—the Bragg length—before being reflected by Bragg interference. Here, we demonstrate how to send waves much deeper into crystals in an exemplary study of light in two-dimensional silicon photonic crystals. By spatially shaping the wave fronts, the internal energy density—probed via the laterally scattered intensity—is enhanced at a tunable distance away from the front surface. The intensity is up to 100× enhanced compared to random wave fronts, and extends as far as 8× the Bragg length, which agrees with an extended mesoscopic model. We thus report a novel control knob for mesoscopic wave transport that pertains to any kind of waves.",
author = "Ravitej Uppu and Manashee Adhikary and Harteveld, {Cornelis A.M.} and Vos, {Willem L.}",
note = "Funding Information: We thank Diana Grishina, Ad Lagendijk, Willemijn Luiten, Femi Ojambati, and Allard Mosk (Utrecht) for helpful comments and experimental help. We acknowledge support from NWO-FOM program Nr. 138 “Stirring of Light!,” NWO-TTW Perspectief program P15-36 “Free form scattering optics” (FFSO), NWO ENW-GROOT program “Self-assembled icosahedral photonic quasicrystals with a band gap for visible light” OCENW.GROOT.2019.071, the (ANP), and the Center for Hybrid Quantum Networks (Hy-Q; DNRF-139), Niels Bohr Institute, University of Copenhagen, led by Peter Lodahl for supporting RU during a postdoctoral stay. Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",
year = "2021",
month = apr,
day = "27",
doi = "10.1103/PhysRevLett.126.177402",
language = "English",
volume = "126",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "17",
}