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Surface-plasmon-polariton assisted modification of spontaneous emission of colloidal quantum dots in metal nanostructures

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3 Author(s)
Briscoe, Jayson L. ; Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, New Mexico 88003-8001, USA ; Jayasundara, Nadeepa ; Cho, Sang-Yeon

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We experimentally demonstrate extraordinary optical transmission (EOT) assisted photoluminescence (PL) of CdSe/CdS colloidal quantum dots (QDs). The quantum dots were encapsulated between a metallic nanostructure and a Bragg reflector to enhance the interaction of spontaneously emitted photons with a resonant electromagnetic surface wave. The measured PL spectrum of the fabricated sample exhibits spectral narrowing and a shift in peak wavelength of 22 nm and 7 nm, respectively. Furthermore, we tested the angular dependence of the signal to confirm the existence of EOT. This demonstration is a critical step towards realizing plasmonic colloidal QD based coherent emitters.

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Applied Physics Letters  (Volume:102 ,  Issue: 2 )