Leveraging Nanocavity Harmonics for Control of Optical Processes in 2D Semiconductors
Author(s)Akselrod, Gleb M.; Ming, Tian; Argyropoulos, Christos; Hoang, Thang B.; Lin, Yuxuan; Ling, Xi; Smith, David R.; Kong, Jing; Mikkelsen, Maiken H.; ... Show more Show less
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Optical cavities with multiple tunable resonances have the potential to provide unique electromagnetic environments at two or more distinct wavelengths—critical for control of optical processes such as nonlinear generation, entangled photon generation, or photoluminescence (PL) enhancement. Here, we show a plasmonic nanocavity based on a nanopatch antenna design that has two tunable resonant modes in the visible spectrum separated by 350 nm and with line widths of ∼60 nm. The importance of utilizing two resonances simultaneously is demonstrated by integrating monolayer MoS[subscript 2], a two-dimensional semiconductor, into the colloidally synthesized nanocavities. We observe a 2000-fold enhancement in the PL intensity of MoS[subscript 2]—which has intrinsically low absorption and small quantum yield—at room temperature, enabled by the combination of tailored absorption enhancement at the first harmonic and PL quantum-yield enhancement at the fundamental resonance.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of Electronics
American Chemical Society (ACS)
Akselrod, Gleb M., Tian Ming, Christos Argyropoulos, Thang B. Hoang, Yuxuan Lin, Xi Ling, David R. Smith, Jing Kong, and Maiken H. Mikkelsen. “Leveraging Nanocavity Harmonics for Control of Optical Processes in 2D Semiconductors.” Nano Lett. 15, no. 5 (May 13, 2015): 3578–3584. © 2015 American Chemical Society
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