Enhanced electroluminescence from WSe2 monolayers coupled to gold antenna arrays (Conference Presentation)

Transition metal dichalcogenide (TMDC) monolayers are promising materials for nanoscale light emitters. By coupling TMDCs to optical antennas, the spontaneous emission rate can be greatly enhanced, yielding faster device modulation. However, achieving high rate enhancement is difficult with electrically-injected light emitters compared to optical injection. We demonstrate two device designs to overcome these challenges: 1) a light-emitting capacitor (LEC) coupled to a slot antenna array, and 2) a light-emitting diode (LED) coupled to a nanosquare antenna array. The LEC shows high polarization ratios >30x, while the LED shows >10x enhanced electroluminescence for the antenna coupled device relative to control devices.