Scalable variable-index elasto-optic metamaterials for macroscopic optical components and devices

Title
Scalable variable-index elasto-optic metamaterials for macroscopic optical components and devices
Authors
강구민신동혁김준현김창욱배규영백승화Yaroslav UrzhumovDavid R. Smith김경식
Issue Date
2017-07
Publisher
Nature Communications
Citation
VOL 8, NO 16090-8
Abstract
Optical metamaterials with an artificial subwavelength structure offer new approaches to implement advanced optical devices. However, some of the biggest challenges associated with the development of metamaterials in the visible spectrum are the high costs and slow production speeds of the nanofabrication processes. Here, we demonstrate a macroscale (>35mm) transformation-optics wave bender (293 mm(2)) and Luneburg lens (855 mm(2)) in the broadband white-light visible wavelength range using the concept of elasto-optic metamaterials that combines optics and solid mechanics. Our metamaterials consist of mesoscopically homogeneous chunks of bulk aerogels with superior, broadband optical transparency across the visible spectrum and an adjustable, stress-tuneable refractive index ranging from 1.43 down to nearly the free space index (similar to 1.074). The experimental results show that broadband light can be controlled and redirected in a volume of >10(5)lambda x 10(5)lambda x 10(3)lambda, which enables natural light to be processed directly by metamaterial-based optical devices without any additional coupling components.
URI
http://pubs.kist.re.kr/handle/201004/66599
ISSN
2041-1723
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