Enhanced Transmission of Higher Order Plasmon Modes With Random Au Nanoparticles in Periodic Hole Arrays

Author

Chen, Yu-Cheng ; Chang, Yi-Tsung ; Chen, Hung-Hsin ; Chuang, Fang-Tzu ; Cheng, Che-Hsuan ; Lee, Si-Chen

Author_Institution

Grad. Inst. of Photonics & Optoelectron., Nat. Taiwan Univ., Taipei, Taiwan

Volume

25

Issue

1

fYear

2013

fDate

Jan.1, 2013

Firstpage

47

Lastpage

50

Abstract

The enhanced transmission of higher order plasmon modes with random gold nanoparticles embedded in periodic hole arrays using asymmetric pair aperture as a unit is investigated in the midinfrared regime. Different thicknesses of gold film were deposited inside holes and then annealed to form randomly sized and distributed nanoparticles. The holes deposited with thin gold film exhibit significantly enhanced transmission in higher order modes after thermal annealing. The enormous local electric field around the nanoparticles enhances the scattering effect that contributes to the enhanced infrared transmission. This unique design, which integrates localized and propagating surface plasmons, provides an easy way for midinfrared applications in need of enhanced transmission in higher order modes.

Keywords

annealing; gold; nanoparticles; nanophotonics; optical films; surface plasmons; Au; asymmetric pair aperture; distributed nanoparticles; electric field; higher order plasmon modes; infrared transmission; periodic hole arrays; random nanoparticles; scattering effect; surface plasmons; thermal annealing; Annealing; Apertures; Films; Gold; Nanoparticles; Plasmons; Silicon; Enhanced transmission; midinfrared region; nanoparticles; surface plasmon; thermal annealing;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2227698

Filename

6357220