Spatially Shaping Waves to Penetrate Deep inside a Forbidden Gap

Ravitej Uppu; Manashee Adhikary; Cornelis A. M. Harteveld; Willem L. Vos

doi:10.1103/PhysRevLett.126.177402

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Spatially Shaping Waves to Penetrate Deep inside a Forbidden Gap

Journal article

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Spatially Shaping Waves to Penetrate Deep inside a Forbidden Gap

Ravitej Uppu, Manashee Adhikary, Cornelis A. M. Harteveld and Willem L. Vos

Physical review letters, Vol.126(17), pp.177402-177402

04/30/2021

DOI: 10.1103/PhysRevLett.126.177402

PMID: 33988449

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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 100x enhanced compared to random wave fronts, and extends as far as 8x 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.

Physical Sciences

Physics

Physics, Multidisciplinary

Science & Technology

Details

Title: Subtitle: Spatially Shaping Waves to Penetrate Deep inside a Forbidden Gap
Creators: Ravitej Uppu - University of Twente
Manashee Adhikary - University of Twente
Cornelis A. M. Harteveld - University of Twente
Willem L. Vos - University of Twente
Resource Type: Journal article
Publication Details: Physical review letters, Vol.126(17), pp.177402-177402
DOI: 10.1103/PhysRevLett.126.177402
PMID: 33988449
NLM abbreviation: Phys Rev Lett
ISSN: 0031-9007
eISSN: 1079-7114
Publisher: Amer Physical Soc
Number of pages: 6
Grant note: 138 / NWO-FOM program MESA thorn Institute section Applied Nanophotonics (ANP) OCENW.GROOT.2019.071 / NWO ENW-GROOT program "Self-assembled icosahedral photonic quasicrystals with a band gap for visible light" DNRF-139 / Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen P15-36 / NWO-TTWPerspectief program
Language: English
Date published: 04/30/2021
Academic Unit: Physics and Astronomy
Record Identifier: 9984442010602771

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