Engineering Plasmonic Waves
in 2D Electron Systems
Kitty Yeung
Harvard University
April 27th, 2015
Thesis advisor: Donhee Ham

Plasmonic waves in 2D
- Surface Plasmon
- 2D Plasmon
Subwavelength, optical frequency
Ultra-subwavelength, GHz-THz
AlGaAs/GaAs 2DEG
- GHz, low temperature





Will Andress
Hosang Yoon


Graphene
- far-IR THz, room temperature
Nano Letters, 14, 2479 (2014)

Submitted (2015)


Jingyee Chee
Acknowledgement
Donhee Ham
Hosang Yoon
Jingyee Chee
William Andress
Ling Qin
Guangyu Xu
Jeffrey Abbott
Evelyn Hu
Marko Loncar
Amir Yacoby
David Clarke
Jing Kong (MIT)
Yi Song (MIT)
Loren Pfeiffer (Princeton)
Ken West (Princeton)
National Science Foundation
Air Force Office of Scientific Research
Office of Naval Research



Guixiong Zhong
Tim McClure
Plasmons in Different Dimensions
- Bulk
- Surface Plasmon
- 2D Plasmon
Plasmons in Different Dimensions
- Bulk (3D)

E

Plasmons in Different Dimensions
- Surface Plasmon (3D)
Hosang Yoon, Kitty Yeung, Philip Kim, Donhee Ham, Phil. Trans. R. Soc. A 372, 20130104 (2014)

Penetration Depth


TM mode E

Plasmons in Different Dimensions
- 2D Plasmon





Hosang Yoon, Kitty Yeung, Philip Kim, Donhee Ham, Phil. Trans. R. Soc. A 372, 20130104 (2014)
Transmission Line Model
- Ungated







Hosang Yoon, Kitty Yeung, Philip Kim, Donhee Ham, Phil. Trans. R. Soc. A 372, 20130104 (2014)
Transmission Line Model
- Gated






Hosang Yoon, Kitty Yeung, Philip Kim, Donhee Ham, Phil. Trans. R. Soc. A 372, 20130104 (2014)

2D Plasmonic Circuits
William Andress, Hosang Yoon, Kitty Yeung, Ling Qin et al., Nano Lett. 12, 2272 (2012)




440,000-fold mode-area reduction
~
2D Plasmonic Negative Refractive Metamaterial


Hosang Yoon, Kitty Yeung, V. Umansky and Donhee Ham, Nature, 488, 65 (2012)



Refractive index ~-700
2D Plasmonic Interferometer


Kitty Yeung et al., App. Phy. Lett. 102, 021104 (2013)
2D Plasmonic Interferometer

Sensitivity enhanced

2D Plasmonic Interferometer

2D Plasmonic Interferometer

2D Plasmonic Interferometer


2D Plasmonic Interferometer

Temperature dependence

2D Plasmonic Interferometer

Temperature dependence

2D Plasmonic Materials





2DEG
Graphene



Hosang Yoon, Kitty Yeung, Philip Kim, Donhee Ham, Phil. Trans. R. Soc. A 372, 20130104 (2014)
Hosang Yoon, et al., Nature Nanotech. 9, 594 (2014)

Graphene Plasmonics






Yan el al., Avouris Group
IBM (2012)
Ju et al., Wang Group
UC Berkeley (2011)
First Graphene Plasmonic Crystals




Microscope
SEM
Kitty Yeung, Jingyee Chee et al. Nano Letters, 14, 2479 (2014)
Graphene Plasmonic Crystals
- Band Structure




Graphene Plasmonic Crystals



Graphene Plasmonic Crystals

C6v point group symmetry
Graphene Plasmonic Crystals


Graphene Plasmonic Crystals

Graphene Plasmonic Crystals



- Carrier concentration
Graphene Plasmonic Crystals
- Fermi level measurement
Graphene Plasmonic Crystals



graphene
quartz
Submitted (2015)
- Lattice dimensions


Graphene Plasmonic Crystals



simulation
experiment
simulation
- Lattice dimensions
Graphene Plasmonic Crystals
- Lattice symmetry

circular apertures


elliptical apertures
C6v
C4v
C2v

Graphene Plasmonic Crystals
- Symmetry breaking - degeneracy lifting


circular apertures
elliptical apertures
Graphene Plasmonic Crystals



- Symmetry breaking
Graphene Plasmonic Crystals


circular apertures
elliptical apertures
- Symmetry breaking - inactive modes excited
Graphene Plasmonic Crystals




Graphene Plasmonic Crystals
- Symmetry breaking - inactive modes excited
Graphene Plasmonic Crystals
Band Structure Engineering
- Carrier concentration
- Substrate dielectric constant
- Lattice dimensions
- Aperture shape
- Lattice symmetry

Research papers



Kitty Y. M. Yeung, Hosang Yoon, William Andress, Ken West, Loren Pfeiffer and Donhee Ham, Two-Path Solid-State Interferometry Using Ultra-Subwavelength 2D Plasmonic Waves,
App. Phys. Lett. 102, 021104 (2013)
William Andress, Hosang Yoon, Kitty Y. M. Yeung, Ling Qin, Ken West, Loren Pfeiffer and Donhee Ham, Ultra-Subwavelength Two-Dimensional Plasmonic Circuits,
Nano Lett. 12, 2272 (2012)
Hosang Yoon, Kitty Y. M. Yeung, V. Umansky and Donhee Ham, A Newtonian Approach to Negative Refraction, Nature, 488, 65 (2012)
Engineering Plasmonic Waves in 2D Electron Systems

Hosang Yoon, Kitty Yeung, Philip Kim, Donhee Ham,
Phil. Trans. R. Soc. A 372, 20130104 (2014)
1
2
3
4
Research papers

Kitty Y. M. Yeung, Jingyee Chee, Hosang Yoon, Yi Song, Jing Kong and Donhee Ham, Far-Infrared Graphene Plasmonic Crystals for Plasmonis Band Engineering,
Nano Letters, 14, 2479 (2014)
Engineering Plasmonic Waves in 2D Electron Systems

Kitty Y. M. Yeung, Jingyee Chee, Yi Song, Jing Kong and Donhee Ham,
Symmetry Engineering of Graphene Plasmonic Crystals,
Submitted (2015)
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Acknowledgement
Donhee Ham
Hosang Yoon
Jingyee Chee
William Andress
Ling Qin
Guangyu Xu
Jeffrey Abbott
Evelyn Hu
Marko Loncar
Amir Yacoby
David Clarke
Jing Kong (MIT)
Yi Song (MIT)
Loren Pfeiffer (Princeton)
Ken West (Princeton)
National Science Foundation
Air Force Office of Scientific Research
Office of Naval Research



Guixiong Zhong
Tim McClure
Acknowledgement
Ian Frank
Shota Kita
Hu Group
Kasey Russell
Jonathan Lee

Michael Moebius
Mikhail Kats
Nathalie de Leon
Marsela Jorgolli
Nuno Peres (Minho)
Yuliy Bludov (Minho)
Jiangdong Deng
Jason Tresback
Ling Xie
Mike Donohoe
Jun Xu (MIT)
Acknowledgement








Acknowledgement

My family
Engineering Plasmonic Waves
in 2D Electron Systems
Kitty Yeung
Harvard University
April 27th, 2015
Thesis advisor: Donhee Ham

PhD defense
By kittyyeung
PhD defense
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