Anderson light localization in biological nanostructures of native silk

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Title
Anderson light localization in biological nanostructures of native silk
Author(s)
Seung Ho Choi; Seong-Wan Kim; Zahyun Ku; Michelle A. Visbal-Onufrak; Seong-Ryul Kim; Kwang-Ho Choi; Hakseok Ko; Wonshik Choi; Augustine M. Urbas; Tae-Won Goo; Young L. Kim
Publication Date
2018-01
Journal
NATURE COMMUNICATIONS, v.9, no.1, pp.452 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Light in biological media is known as freely diffusing because interference is negligible. Here, we show Anderson light localization in quasi-two-dimensional protein nanostructures produced by silkworms (Bombyx mori). For transmission channels in native silk, the light flux is governed by a few localized modes. Relative spatial fluctuations in transmission quantities are proximal to the Anderson regime. The sizes of passive cavities (smaller than a single fibre) and the statistics of modes (decomposed from excitation at the gain-loss equilibrium) differentiate silk from other diffusive structures sharing microscopic morphological similarity. Because the strong reflectivity from Anderson localization is combined with the high emissivity of the biomolecules in infra-red radiation, silk radiates heat more than it absorbs for passive cooling. This collective evidence explains how a silkworm designs a nanoarchitectured optical window of resonant tunnelling in the physically closed structures, while suppressing most of transmission in the visible spectrum and emitting thermal radiation. © 2018 The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/4392
ISSN
2041-1723
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > Journal Papers (저널논문)
Files in This Item:
[2018] N COMM Anderson localization 공동연구(최원식).pdfDownload

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