Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5652
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Title: Time-variant 1D photonic crystals using flowing microdroplets
Authors: Chen, Z
Yong, Z
Leung, CW 
Zhang, X 
Chen, Y
Chan, HLW 
Wang, Y 
Issue Date: 22-Oct-2012
Source: Optics express, 22 Oct. 2012, v. 20, no. 22, p. 24330-24341
Abstract: In this paper we propose a time-variant photonic crystal, which can be formed by a stream of wave-length-scale microdroplets flowing through a microfluidic channel. The functionality stems from the photonic bandgap generated from the 1D periodic perturbation of refractive index. The periodicity, volume fraction and composition of both the dispersed and the continuous phases can be conveniently tuned in real time by hydrodynamic or pneumatic methods. By simulation, it is found that the timevariant nature of the proposed structure can induce an abnormal energy evolution, which is distinct from any existing photonic crystal structures. As a basic component for optofluidic systems, the droplet-based photonic crystal may find potential applications in light modulation and light confinement, and could be an ideal model for pursuing physical insights into time-variant optofluidic systems.
Keywords: Crystals structure
Refractive index
Publisher: Optical Society of America
Journal: Optics express 
EISSN: 1094-4087
DOI: 10.1364/OE.20.024330
Rights: © 2012 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=oe-20-22-24330. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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