Ultraconfined Plasmonic Hotspots Inside Graphene Nanobubbles

被引：41

作者：

Fei, Z. ^{[1
,2
,3
]}

Foley, J. J. ^{[2
,4
]}

Gannett, W. ^{[5
,6
]}

Liu, M. K. ^{[1
,7
]}

Dai, S. ^{[1
]}

Ni, G. X. ^{[1
]}

Zettl, A. ^{[5
,6
]}

Fogler, M. M. ^{[1
]}

Wiederrecht, G. P. ^{[2
]}

Gray, S. K. ^{[2
]}

Basov, D. N. ^{[1
,8
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA

[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[4] William Paterson Univ, Dept Chem, Wayne, NJ 07470 USA

[5] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[6] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[7] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[8] Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA

来源：

NANO LETTERS | 2016年 / 16卷 / 12期

关键词：

Graphene nanobubbles; heterostructures; nanoinfrared imaging; plasmon hotspots; FDTD simulation; NATURAL HYPERBOLIC MATERIAL; DER-WAALS HETEROSTRUCTURES; ENHANCED RAMAN-SCATTERING; HEXAGONAL BORON-NITRIDE; PHONON-POLARITONS; HIGH-QUALITY; HOT-SPOTS; SPECTROSCOPY; NANOSTRUCTURES; ULTRAFAST;

D O I：

10.1021/acs.nanolett.6b04076

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on a nanoinfrared (IR) imaging study of ultraconfmed plasmonic hotspots inside graphene nanobubbles formed in graphene/hexagonal boron nitride (hBN) heterostructures. The volume of these plasmonic hotspots is more than one-million-times smaller than what could be achieved by free-space IR photons, and their real space distributions are controlled by the sizes and shapes of the nanobubbles. Theoretical analysis indicates that the observed plasmonic hotspots are formed due to a significant increase of the local plasmon wavelength in the nanobubble regions. Such an increase is attributed to the high sensitivity of graphene plasmons to its dielectric environment. Our work presents a novel scheme for plasmonic hotspot formation and sheds light on future applications of graphene nanobubbles for plasmon-enhanced IR spectroscopy.

引用

页码：7842 / 7848

页数：7

共 64 条

[1] Hotspot-mediated ultrafast nonlinear control of multifrequency plasmonic nanoantennas
Abb, Martina
Wang, Yudong
de Groot, C. H.
Muskens, Otto L.
[J]. NATURE COMMUNICATIONS, 2014, 5
[2] Controlling graphene plasmons with resonant metal antennas and spatial conductivity patterns
Alonso-Gonzalez, P.
Nikitin, A. Y.
Golmar, F.
Centeno, A.
Pesquera, A.
Velez, S.
Chen, J.
Navickaite, G.
Koppens, F.
Zurutuza, A.
Casanova, F.
Hueso, L. E.
Hillenbrand, R.
[J]. SCIENCE, 2014, 344 (6190) : 1369 - 1373
[3] Baart T. A., 2011, THESIS
[4] Graphene Photonics, Plasmonics, and Broadband Optoelectronic Devices
Bao, Qiaoliang
Loh, Kian Ping
[J]. ACS NANO, 2012, 6 (05) : 3677 - 3694
[5] Graphene/h-BN plasmon-phonon coupling and plasmon delocalization observed by infrared nano-spectroscopy
Barcelos, Ingrid D.
Cadore, Alisson R.
Campos, Leonardo C.
Malachias, Angelo
Watanabe, K.
Taniguchi, T.
Maia, Francisco C. B.
Freitas, Raul
Deneke, Christoph
[J]. NANOSCALE, 2015, 7 (27) : 11620 - 11625
[6] Polaritons in van der Waals materials
Basov, D. N.
Fogler, M. M.
Garcia de Abajo, F. J.
[J]. SCIENCE, 2016, 354 (6309)
[7] Colloquium: Graphene spectroscopy
Basov, D. N.
Fogler, M. M.
Lanzara, A.
Wang, Feng
Zhang, Yuanbo
[J]. REVIEWS OF MODERN PHYSICS, 2014, 86 (03) : 959 - 994
[8] Highly Confined Tunable Mid-Infrared Plasmonics in Graphene Nanoresonators
Brar, Victor W.
Jang, Min Seok
Sherrott, Michelle
Lopez, Josue J.
Atwater, Harry A.
[J]. NANO LETTERS, 2013, 13 (06) : 2541 - 2547
[9] Plasmonics for future biosensors
Brolo, Alexandre G.
[J]. NATURE PHOTONICS, 2012, 6 (11) : 709 - 713
[10] Sub-diffractional volume-confined polaritons in the natural hyperbolic material hexagonal boron nitride
Caldwell, Joshua D.
Kretinin, Andrey V.
Chen, Yiguo
Giannini, Vincenzo
Fogler, Michael M.
Francescato, Yan
Ellis, Chase T.
Tischler, Joseph G.
Woods, Colin R.
Giles, Alexander J.
Hong, Minghui
Watanabe, Kenji
Taniguchi, Takashi
Maier, Stefan A.
Novoselov, Kostya S.
[J]. NATURE COMMUNICATIONS, 2014, 5

← 1 2 3 4 5 6 7 →