Controlling surface charge and spin density oscillations by Dirac plasmon interaction in thin topological insulators

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Controlling surface charge and spin density oscillations by Dirac plasmon interaction in thin topological insulators. / Poyli, M. Ameen; Hrtoň, M.; Nechaev, I. A.; Nikitin, A. Y.; Echenique, P. M.; Silkin, V. M.; Aizpurua, J.; Esteban, R.

In: Physical Review B, Vol. 97, No. 11, 115420, 15.03.2018.

Research output: Contribution to journal › Article › peer-review

Author

Poyli, M. Ameen ; Hrtoň, M. ; Nechaev, I. A. ; Nikitin, A. Y. ; Echenique, P. M. ; Silkin, V. M. ; Aizpurua, J. ; Esteban, R. / Controlling surface charge and spin density oscillations by Dirac plasmon interaction in thin topological insulators. In: Physical Review B. 2018 ; Vol. 97, No. 11.

BibTeX

@article{724dc5456cf344e29420f06ed3e0e61d,

title = "Controlling surface charge and spin density oscillations by Dirac plasmon interaction in thin topological insulators",

abstract = "Thin topological insulator (TI) films support optical and acoustic plasmonic modes characterized by effective net charge or net spin density, respectively. We combine many-body and electromagnetic calculations to study how these modes can be selectively excited at films and nanodisks at infrared and THz frequencies. We first discuss the excitation of propagating plasmons in a thin film by a point dipolar source. We emphasize how changing the distance between the dipolar source and the film allows us to control the relative strength of the acoustic and optical plasmons and thus to excite net-spin or net-charge waves on demand. The acoustic and optical modes in a nanodisk structure can be efficiently tuned by changing the size of the disk or by applying electrostatic gating. Furthermore, these modes can be confined to regions of dimensions much smaller than the wavelength. The control of the excitation of acoustic and optical modes indicates that thin topological insulators are a promising system to manipulate the spin and charge properties of the plasmonic response, with potential applications in fast, compact, and electrically-controlled spintronic devices.",

keywords = "GRAPHENE PLASMONS, OPTICAL-PROPERTIES, BI2TE3, BI2SE3, NANOSTRUCTURES, RESONATORS, POLARITONS, FERMIONS, ANTENNAS, ARRAYS",

author = "Poyli, {M. Ameen} and M. Hrto{\v n} and Nechaev, {I. A.} and Nikitin, {A. Y.} and Echenique, {P. M.} and Silkin, {V. M.} and J. Aizpurua and R. Esteban",

year = "2018",

month = mar,

day = "15",

doi = "10.1103/PhysRevB.97.115420",

language = "English",

volume = "97",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "11",

}

RIS

TY - JOUR

T1 - Controlling surface charge and spin density oscillations by Dirac plasmon interaction in thin topological insulators

AU - Poyli, M. Ameen

AU - Hrtoň, M.

AU - Nechaev, I. A.

AU - Nikitin, A. Y.

AU - Echenique, P. M.

AU - Silkin, V. M.

AU - Aizpurua, J.

AU - Esteban, R.

PY - 2018/3/15

Y1 - 2018/3/15

N2 - Thin topological insulator (TI) films support optical and acoustic plasmonic modes characterized by effective net charge or net spin density, respectively. We combine many-body and electromagnetic calculations to study how these modes can be selectively excited at films and nanodisks at infrared and THz frequencies. We first discuss the excitation of propagating plasmons in a thin film by a point dipolar source. We emphasize how changing the distance between the dipolar source and the film allows us to control the relative strength of the acoustic and optical plasmons and thus to excite net-spin or net-charge waves on demand. The acoustic and optical modes in a nanodisk structure can be efficiently tuned by changing the size of the disk or by applying electrostatic gating. Furthermore, these modes can be confined to regions of dimensions much smaller than the wavelength. The control of the excitation of acoustic and optical modes indicates that thin topological insulators are a promising system to manipulate the spin and charge properties of the plasmonic response, with potential applications in fast, compact, and electrically-controlled spintronic devices.

AB - Thin topological insulator (TI) films support optical and acoustic plasmonic modes characterized by effective net charge or net spin density, respectively. We combine many-body and electromagnetic calculations to study how these modes can be selectively excited at films and nanodisks at infrared and THz frequencies. We first discuss the excitation of propagating plasmons in a thin film by a point dipolar source. We emphasize how changing the distance between the dipolar source and the film allows us to control the relative strength of the acoustic and optical plasmons and thus to excite net-spin or net-charge waves on demand. The acoustic and optical modes in a nanodisk structure can be efficiently tuned by changing the size of the disk or by applying electrostatic gating. Furthermore, these modes can be confined to regions of dimensions much smaller than the wavelength. The control of the excitation of acoustic and optical modes indicates that thin topological insulators are a promising system to manipulate the spin and charge properties of the plasmonic response, with potential applications in fast, compact, and electrically-controlled spintronic devices.

KW - GRAPHENE PLASMONS

KW - OPTICAL-PROPERTIES

KW - BI2TE3

KW - BI2SE3

KW - NANOSTRUCTURES

KW - RESONATORS

KW - POLARITONS

KW - FERMIONS

KW - ANTENNAS

KW - ARRAYS

UR - http://www.scopus.com/inward/record.url?scp=85043986133&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/controlling-surface-charge-spin-density-oscillations-dirac-plasmon-interaction-thin-topological-insu

U2 - 10.1103/PhysRevB.97.115420

DO - 10.1103/PhysRevB.97.115420

M3 - Article

AN - SCOPUS:85043986133

VL - 97

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 11

M1 - 115420

ER -

ID: 36282623