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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Published on: July 21, 2018

Enhanced spontaneous light emission by multiple surface plasmon coupling.

Wen-Huei Chu¹, Yuan-Jen Chuang, Chuan-Pu Liu

¹Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan.

|July 1, 2010

Summary

This summary is machine-generated.

Researchers enhanced polyfluoren copolymer photoluminescence using surface plasmon resonance (SPR). Coupling localized and propagating SPR modes significantly boosted light emission across various wavelengths.

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Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Polyfluoren copolymers are white-light emitting materials.
Surface Plasmon Resonance (SPR) offers potential for enhancing light emission.
Controlling SPR modes (localized and propagating) is key for targeted enhancement.

Purpose of the Study:

To selectively enhance the photoluminescence of polyfluoren copolymers.
To investigate the effects of localized and propagating SPR modes on light emission.
To achieve synergistic enhancement by coupling both SPR modes.

Main Methods:

Fabrication of silver sub-micron cylinders (75nm height) using e-beam lithography, evaporation, and lift-off.
Deposition of a 50nm silver thin film as a substrate for propagating SPR.
Coupling of localized SPR from cylinders and propagating SPR from the thin film with polyfluoren copolymers.

Main Results:

Localized SPR enhanced light emissions at 500nm and 533nm.
Propagating SPR, supported by the silver thin film, enhanced the blue emission band at 438nm.
Coupling both localized and propagating SPR resulted in a 4 to 5.4 times photoluminescence enhancement, exceeding single-mode enhancement.

Conclusions:

Selective enhancement of polyfluoren copolymer photoluminescence is achievable via SPR coupling.
Localized and propagating SPR modes influence different emission wavelengths.
Synergistic coupling of SPR modes offers superior light emission enhancement for white-light materials.