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Journal of Nanophotonics

Integrated photonics using colloidal quantum dots
Author(s): Vinod M. Menon; Saima Husaini; Nicky Okoye; Nikesh Valappil
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Paper Abstract

Integrated photonic devices were realized using colloidal quantum dot composites such as flexible microcavity laser, microdisk emitters and integrated active-passive waveguides. The microcavity laser structure was realized using spin coating and consisted of an all-polymer distributed Bragg reflector with a poly-vinyl carbazole cavity layer embedded with InGaP/ZnS colloidal quantum dots. These microcavities can be peeled off the substrate yielding a flexible structure that can conform to any shape and whose emission spectra can be mechanically tuned. Planar photonic devices consisting of vertically coupled microring resonators, microdisk emitters, active-passive integrated waveguide structures and coupled active microdisk resonators were realized using soft lithography, photo-lithography, and electron beam lithography, respectively. The gain medium in all these devices was a composite consisting of quantum dots embedded in SU8 matrix. Finally, the effect of the host matrix on the optical properties of the quantum dots using results of steady-state and time-resolved luminescence measurements was determined. In addition to their specific functionalities, these novel device demonstrations and their development present a low-cost alternative to the traditional photonic device fabrication techniques.

Paper Details

Date Published: 1 November 2009
PDF: 11 pages
J. Nanophoton. 3(1) 031608 doi: 10.1117/1.3271386
Published in: Journal of Nanophotonics Volume 3, Issue 1
Show Author Affiliations
Vinod M. Menon, Queen's College (United States)
Saima Husaini, Queen's College (United States)
Nicky Okoye, Queen's College (United States)
Nikesh Valappil, Queen's College (United States)

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