Engineering 2D Plasmonic Waves 

Kitty Yeung

Harvard University

ymkyeung@fas.harvard.edu

Thesis advisor: Donhee Ham

Engineering 2D Plasmonic Waves 

K. Yeung et al., App. Phy. Lett. 102, 021104 (2013)

Engineering 2D Plasmonic Waves 

K. Yeung, Jingyee Chee et al., Nano Letters, 14, 2479 (2014)

Plasmons in Different Dimensions

• Bulk
• Surface Plasmon Polariton
• 2D Plasmon

Plasmons in Different Dimensions

• Bulk

F. Stern, Phy. Lett. 18, 546 (1967); E. N. Economou, Phy. Rev. 182, 539 (1969); W. L. Barnes et al., Nature 424, 824 (2003)

E

Plasmons in Different Dimensions

• Surface Plasmon Polariton

F. Stern, Phy. Lett. 18, 546 (1967); E. N. Economou, Phy. Rev. 182, 539 (1969); W. L. Barnes et al., Nature 424, 824 (2003)

Penetration Depth

TM mode E

Plasmons in Different Dimensions

• 2D Plasmon

F. Stern, Phy. Lett. 18, 546 (1967); E. N. Economou, Phy. Rev. 182, 539 (1969); W. L. Barnes et al., Nature 424, 824 (2003)

Transmission Line Model 

• Ungated

Staffaroni et al., ArXiv:1006.3126

Transmission Line Model

• Gated

Staffaroni et al., ArXiv:1006.3126; A. Eguiluz et at., Phys. Rev. B, 11, 4989 (1975); W. F. Andress et al., Nano Letters, 12, 2272 (2012)

2D Plasmonic Interferometer

K. Yeung et al., App. Phy. Lett. 102, 021104 (2013)

2D Plasmonic Interferometer

2D Plasmonic Interferometer

2D Plasmonic Interferometer

2D Plasmonic Interferometer

2D Plasmonic Interferometer

Temperature dependence

2D Plasmonic Interferometer

Temperature dependence

2D Plasmonic Materials

2DEG

Graphene

Das Sarma et al., Rev. Mod. Phys. 83, 407 (2011)

Graphene Plasmonics

Ju et al. Nat. Nanotech. (2011)                            Yan el al. New J. Phys. & Nat. Nanotech. (2012) 

Graphene Plasmonic Crystals

Microscope

SEM

K. Yeung, Jingyee Chee et al., Nano Letters, 14, 2479 (2014)

Graphene Plasmonic Crystals

Raman spectrum

Raman 2D peak intensity map

Graphene Plasmonic Crystals

• Band Structure

Graphene Plasmonic Crystals

Graphene Plasmonic Crystals

C6v  point group symmetry

Graphene Plasmonic Crystals

Graphene Plasmonic Crystals

Graphene Plasmonic Crystals

Graphene Plasmonic Crystals

Band Structure Engineering

• Carrier concentration
• Lattice dimensions
• Aperture shape
• Lattice symmetry

Graphene Plasmonic Crystals

Band Structure Engineering

• Carrier concentration

Graphene Plasmonic Crystals

Band Structure Engineering

• Lattice dimensions

Graphene Plasmonic Crystals

Band Structure Engineering

• Aperture shape

Graphene Plasmonic Crystals

Band Structure Engineering

• Lattice symmetry

Experiment

Simulation

Plasmonics in 2D

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)

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)

Future Work

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)

Nuno Peres (Minho)

Yuliy Bludov (Minho)

Ian Frank

Air Force Office of Scientific Research

National Science Foundation

Office of Naval Research

ymkyeung@fas.harvard.edu

Guixiong Zhong

Tim McClure