Abstract
dimension flnite-difierence time-domain (FDTD) method is used to simulate the enhanced blue light emission of gallium nitride light emitting diode (GaN-LED) using the surface-plasmons (SPs) cou- pling with the quantum wells. The numerical simulation results demon- strate that when the silver fllm is coated on GaN-LED, the excited SPs play a key role in the enhanced blue light emission, and the en- hancement depends on the geometries of GaN-LED and silver fllm. An enhancement factor is given to describe the enhancement efiect of light emission. By changing the structure parameters of GaN-LED and sil- ver fllm, the enhanced peak of the light emission in the visible region can be controlled. Under the optimal parameters, about 17 times en- hancement at 460nm can be obtained, and the enhancement efiect is evidently demonstrated by the SPs fleld distribution.
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