Spring 2012 Conference
March 7 - 9

Plenary 8: Michael Eggleston

Optical Antenna Based nanoLED

Spontaneous emission has been considered slower and weaker than stimulated emission. As a result, light-emitting diodes (LEDs) have only been used in applications with bandwidth < 1 GHz. Spontaneous emission is inefficient because the radiating dipole is much smaller than wavelength and such short dipoles are poor radiators. By attaching an optical antenna to the radiating dipole at the nanoscale, the emission rate can be significantly increased. Experimental results of an optical antenna based nanoLED that enhances photoluminescence of a semiconductor emitter by more than 15x is presented. The small mode (0.02 cubic half-wavelengths) and physical (3E-4 cubic wavelengths) volumes are attractive for on-chip optical interconnect applications.