Plasmonic nanoantennas for broad-band enhancement of two-photon emission from semiconductors.
We demonstrate experimentally and theoretically a broad-band enhancement of the spontaneous two-photon emission from AlGaAs at room temperature by plasmonic nanoantenna arrays fabricated on the semiconductor surface. Plasmonic structures with inherently low quality factors but very small effective volumes are shown to be optimal. A 20-fold enhancement was achieved for the entire antenna array, corresponding to an enhancement of nearly 3 orders of magnitude for charge carriers emitting at the near field of a plasmonic antenna.
Nevet
Amir
A
Department of Electrical Engineering, Technion, Haifa, Israel. nevet@tx.technion.ac.il
Berkovitch
Nikolai
N
Hayat
Alex
A
Ginzburg
Pavel
P
Ginzach
Shai
S
Sorias
Ofir
O
Orenstein
Meir
M
D004867:Equipment Design; D019544:Equipment Failure Analysis; D008029:Lighting / Q000295:instrumentation*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D017785:Photons; D012666:Semiconductors; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D014159:Transducers