# Size-dependent nonlocal effects in plasmonic semiconductor particles

N. Asger Mortensen, Johan R. Maack, Martijn Wubs

Publikation: Bidrag til tidsskriftLetterForskningpeer review

### Resumé

Localized surface plasmons (LSP) in semiconductor particles are expected to exhibit spatial nonlocal response effects as the geometry enters the nanometer scale. To investigate these nonlocal effects, we apply the hydrodynamic model to nanospheres of two different semiconductor materials: intrinsic InSb and $n$-doped GaAs. Our results show that the semiconductors indeed display nonlocal effects, and that these effects are even more pronounced than in metals. In a $150\mathrm{\,nm}$ InSb particle at $300\mathrm{\,K}$, the LSP frequency is blueshifted 35%, which is orders of magnitude larger than the blueshift in a metal particle of the same size. This property, together with their tunability, makes semiconductors a promising platform for experiments in nonlocal effects.
Originalsprog Engelsk 17003 EPL 119 1 0295-5075 https://doi.org/10.1209/0295-5075/119/17003 Udgivet - 2017

### Emneord

• cond-mat.mes-hall

### Citer dette

Mortensen, N. Asger ; Maack, Johan R. ; Wubs, Martijn. / Size-dependent nonlocal effects in plasmonic semiconductor particles. I: EPL. 2017 ; Bind 119, Nr. 1.
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abstract = "Localized surface plasmons (LSP) in semiconductor particles are expected to exhibit spatial nonlocal response effects as the geometry enters the nanometer scale. To investigate these nonlocal effects, we apply the hydrodynamic model to nanospheres of two different semiconductor materials: intrinsic InSb and $n$-doped GaAs. Our results show that the semiconductors indeed display nonlocal effects, and that these effects are even more pronounced than in metals. In a $150\mathrm{\,nm}$ InSb particle at $300\mathrm{\,K}$, the LSP frequency is blueshifted 35{\%}, which is orders of magnitude larger than the blueshift in a metal particle of the same size. This property, together with their tunability, makes semiconductors a promising platform for experiments in nonlocal effects.",
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Size-dependent nonlocal effects in plasmonic semiconductor particles. / Mortensen, N. Asger; Maack, Johan R.; Wubs, Martijn.

I: EPL, Bind 119, Nr. 1, 17003, 2017.

Publikation: Bidrag til tidsskriftLetterForskningpeer review

TY - JOUR

T1 - Size-dependent nonlocal effects in plasmonic semiconductor particles

AU - Mortensen, N. Asger

AU - Maack, Johan R.

AU - Wubs, Martijn

N1 - 7 pages, 3 figures, 1 table, corrected typos in text and figure 2

PY - 2017

Y1 - 2017

N2 - Localized surface plasmons (LSP) in semiconductor particles are expected to exhibit spatial nonlocal response effects as the geometry enters the nanometer scale. To investigate these nonlocal effects, we apply the hydrodynamic model to nanospheres of two different semiconductor materials: intrinsic InSb and $n$-doped GaAs. Our results show that the semiconductors indeed display nonlocal effects, and that these effects are even more pronounced than in metals. In a $150\mathrm{\,nm}$ InSb particle at $300\mathrm{\,K}$, the LSP frequency is blueshifted 35%, which is orders of magnitude larger than the blueshift in a metal particle of the same size. This property, together with their tunability, makes semiconductors a promising platform for experiments in nonlocal effects.

AB - Localized surface plasmons (LSP) in semiconductor particles are expected to exhibit spatial nonlocal response effects as the geometry enters the nanometer scale. To investigate these nonlocal effects, we apply the hydrodynamic model to nanospheres of two different semiconductor materials: intrinsic InSb and $n$-doped GaAs. Our results show that the semiconductors indeed display nonlocal effects, and that these effects are even more pronounced than in metals. In a $150\mathrm{\,nm}$ InSb particle at $300\mathrm{\,K}$, the LSP frequency is blueshifted 35%, which is orders of magnitude larger than the blueshift in a metal particle of the same size. This property, together with their tunability, makes semiconductors a promising platform for experiments in nonlocal effects.

KW - cond-mat.mes-hall

U2 - 10.1209/0295-5075/119/17003

DO - 10.1209/0295-5075/119/17003

M3 - Letter

VL - 119

JO - EPL

JF - EPL

SN - 0295-5075

IS - 1

M1 - 17003

ER -