1 November 2009 Integrated photonics using colloidal quantum dots
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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.
Vinod M. Menon, Vinod M. Menon, Saima Husaini, Saima Husaini, Nicky Okoye, Nicky Okoye, Nikesh Valappil, Nikesh Valappil, } "Integrated photonics using colloidal quantum dots," Journal of Nanophotonics 3(1), 031608 (1 November 2009). https://doi.org/10.1117/1.3271386 . Submission:
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