Electrically tunable color filter based on a polarization-tailorednano-photonic dichroic resonator featuring an asymmetric subwavelengthgrating

Collection with item attached
2013
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/478130.do
DOI
10.1364/OE.21.028783
Title
Electrically tunable color filter based on a polarization-tailorednano-photonic dichroic resonator featuring an asymmetric subwavelengthgrating
Description
This work was supported by a National Research Foundation of Korea (NRF)grant funded by the Korea government (MSIP) (No. 2013-008672,2013-067321) and a research grant from Kwangwoon University in 2013. Theauthors are grateful to Prof. T. H. Yoon at Pusan National Universityfor his valuable help.
abstract
We have demonstrated a highly efficient electrically tunable color filter, which provides precise control of color output, taking advantage of a nano-photonic polarization-tailored dichroic resonator combined with a liquid-crystal based polarization rotator. The visible dichroic resonator based on the guided mode resonance, which incorporates a planar dielectric waveguide in Si3N4 integrated with an asymmetric two-dimensional subwavelength Al grating with unequal pitches along its principal axes, exhibited polarization specific transmission featuring high efficiency up to 75%. The proposed tunable color filters were constructed by combining three types of dichroic resonators, each of which deals with a mixture of two primary colors (i.e. blue/green, blue/red, and green/red) with a polarization rotator exploiting a twisted nematic liquid crystal cell. The output colors could be dynamically and seamlessly customized across the blend of the two corresponding primary colors, by altering the polarization via the voltage applied to the polarization rotator. For the blue/red filter, the center wavelength was particularly adjusted from 460 to 610 nm with an applied voltage variation of 2 V, leading to a tuning range of up to 150 nm. And the spectral tuning was readily confirmed via color mapping. The proposed devices may permit the tuning span to be readily extended by tailoring the grating pitches. (C) 2013 Optical Society of America
provenance
Made available in Cube on 2018-09-28T12:24:41Z (GMT). No. of bitstreams: 0
language
English
author
Park, Chang-Hyun
Yoon, Yeo-Taek
Shrestha, Vivek Raj
Park, Chul-Soon
Lee, Sang-Shin
Kim, Eun-Soo
orcid
Shrestha, Vivek Raj/0000-0002-7731-7677
accessioned
2018-09-28T12:24:41Z
available
2018-09-28T12:24:41Z
issued
2013
citation
OPTICS EXPRESS(21): 23
issn
1094-4087
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/478130.do
Funder
미래창조과학부
Funding Program
선도연구센터지원
Project ID
1711005853
Jurisdiction
Rep.of Korea
Project Name
Holo-Digilog Human Media Research Center (HoloDigilog)
rights
openAccess
type
article


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