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Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Plasmon-assisted designable multi-resonance photodetection by graphene via nanopatterning of block copolymer

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Title
Plasmon-assisted designable multi-resonance photodetection by graphene via nanopatterning of block copolymer
Author
Kim, Un JeongYoo, SeungminPark, YeonsangShin, MyoungsooKim, JineunJeong, HeejeongBaik, Chan-WookRoh, Young-GeunLee, JaesoongIm, KyuhyunSon, HyungbinHwang, SungwooLee, Chang-WonPark, Soojin
Issue Date
2015-04
Publisher
AMER CHEMICAL SOC
Citation
ACS PHOTONICS, v.2, no.4, pp.506 - 514
Abstract
The photoresponse in graphene has drawn significant attention for potential applications owing to its gapless linear electronic band structure. To enhance both the spectral selectivity and responsivity in graphene, we demonstrate a novel but versatile and simple method of introducing surface plasmons. We utilize block copolymers to fabricate different nanostructured metal nanoparticle arrays on a single graphene surface. The plasmonic resonances could be tuned using Ag, Au, and Cu metal nanoparticles. By extending the synthetic route for the metallic particles, dual surface plasmonic bands from a single material were also successfully realized. Furthermore, enhanced photoresponsivity through the entire visible spectra could be achieved by mixing metallic nanoparticles and by controlling their shapes. Owing to its all-band transition characteristics, the ultrabroad band photocurrent generation in graphene can be tailored for an arbitrary photoresponse, which could be utilized in flexible CMOS image sensors (CIS) or other optoelectronic devices in the future. © 2015 American Chemical Society
URI
https://scholarworks.unist.ac.kr/handle/201301/11566
URL
http://pubs.acs.org/doi/abs/10.1021/ph500412p
DOI
10.1021/ph500412p
ISSN
2330-4022
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