Surface plasmon coupling in a deep-UV light-emitting diode with an embedded Al nanoparticle

The radiated power enhancement (suppression) of a c-plane (c-axis) oriented radiating dipole at a given emission wavelength in the quantum well of a c-plane, deep-UV light-emitting diode (LED) when it is coupled with a surface plasmon (SP) resonance mode induced on a nearby Al nanoparticle (NP) is demonstrated. Also, the enhanced radiated power mainly propagates in the direction from the Al NP toward the dipole. Such SP coupling behaviors can be used for suppressing the TM-polarized emission, enhancing the TE-polarized emission, and reducing the UV absorption of the p-GaN layer in such a deep-UV LED.