Mechanism of enhanced light emission from an emitting layer embedded in metal-insulator-metal structures

被引：23

作者：

Hayashi, Shinji ^{[1
]}

Maekawa, Akimichi ^{[1
]}

Kim, Suk Chan ^{[1
]}

Fujii, Minoru ^{[1
]}

机构：

[1] Kobe Univ, Grad Sch Engn, Dept Elect & Elect Engn, Mesoscop Mat Lab,Nada Ku, Kobe, Hyogo 6578501, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 03期

关键词：

SURFACE-PLASMON-POLARITONS; THIN-FILMS; QUANTUM YIELD; FLUORESCENCE; MICROCAVITIES; EXTRACTION; DEVICES; PLANAR; WAVES; MODES;

D O I：

10.1103/PhysRevB.82.035441

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photoluminescence spectra of a dye layer placed at the middle of a metal-insulator-metal (MIM) structure are measured and compared with those of a reference sample without metallic layers. The observed spectra are much sharper than those of the reference sample and the peak wavelength shifts to shorter wavelengths as the observation angle increases. Furthermore, the enhancement in both the emission intensity and power is clearly observed. Electromagnetic calculations based on a point dipole model indicate that the observed light emission is mediated by radiative surface-plasmon polaritons and lowest-order transverse electric modes supported by the MIM structure. The observed enhancement is thought to result from a combination of the enhanced spontaneous emission rate and concentration of radiation intensities in a relatively narrow wavelength region brought by the MIM structure.

引用

页数：6

共 44 条

[21] Metal-insulator-metal plasmon nanocavities: Analysis of optical properties [J].