
1.Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
2.Department of Mechanical Engineering, George Mason University, Fairfax, VA 22030, USA
3.Department of Physics, Korea University, Seoul 02841, Republic of Korea
4.KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
H-G. Park (hgpark@korea.ac.kr)
SungWoo Nam (swnam@illinois.edu)
Published:2018,
Published Online:13 June 2018,
Received:04 November 2017,
Revised:18 February 2018,
Accepted:18 February 2018
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Kang, P. et al. Mechanically reconfigurable architectured graphene for tunable plasmonic resonances. Light: Science & Applications, 4, 138-146 (2018).
Kang, P. et al. Mechanically reconfigurable architectured graphene for tunable plasmonic resonances. Light: Science & Applications, 4, 138-146 (2018). DOI: 10.1038/s41377-018-0002-4.
Graphene nanostructures with complex geometries have been widely explored for plasmonic applications
as their plasmonic resonances exhibit high spatial confinement and gate tunability. However
edge effects in graphene and the narrow range over which plasmonic resonances can be tuned have limited the use of graphene in optical and optoelectronic applications. Here we present a novel approach to achieve mechanically reconfigurable and strongly resonant plasmonic structures based on crumpled graphene. Our calculations show that mechanical reconfiguration of crumpled graphene structures enables broad spectral tunability for plasmonic resonances from mid- to near-infrared
acting as a new tuning knob combined with conventional electrostatic gating. Furthermore
a continuous sheet of crumpled graphene shows strong confinement of plasmons
with a high near-field intensity enhancement of
~1 × 10
4
. Finally
decay rates for a dipole emitter are significantly enhanced in the proximity of finite-area biaxially crumpled graphene flakes. Our findings indicate that crumpled graphene provides a platform to engineer graphene-based plasmonics through broadband manipulation of strong plasmonic resonances.
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