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Journal Article Electrochromic Infrared Light Modulation in Optical Waveguides
Cited 12 time in scopus Share share facebook twitter linkedin kakaostory
Authors
Jin Tae Kim, Juhee Song, Hojun Ryu, Chil Seong Ah
Issue Date
2020-01
Citation
Advanced Optical Materials, v.8, no.1, pp.1-8
ISSN
2195-1071
Publisher
Wiley
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1002/adom.201901464
Abstract
Electrochromic materials and devices have attracted much attention with their ability to tune the transmissions of visible to infrared (IR) light, allowing the creation of smart windows. This study presents a novel electrochromic device (ECD)-based photonic device that can modulate IR light intensity in a planar optical waveguide ECD. To configure it, a multilayer ECD made of WO3 is integrated on a polymer optical waveguide platform. By using the waveguide to change the optical properties of the ECD electrically, IR light propagating along the optical waveguide core undergoes electroabsorption loss due to the change in charge carrier density in WO3 layer and its intensity is modulated with an extinction depth of 0.6 dB mm?닋1. Experimental results show that the device is capable of discrete intensity attenuation by applying a distinct level gate voltage. Periodic application of gate voltage leads the device to serve as an optical modulator on the order of subseconds. The results also confirm that a new approach to consider ECD-based optical modulators can pave the way for the development of planar photonic-integrated circuits and systems.
KSP Keywords
And systems, Gate voltage, IR light, Light intensity, Light modulation, New approach, Optical modulator, Periodic application, Planar optical waveguide, Polymer optical waveguide, charge carrier density