City University of New York

Nikesh V Valappil

Vinod M Menon

A mechanically flexible array of optically pumped vertical cavity surface emitting lasers, fabricated using spin coating. The array uses InGaP colloidal quantum dots as an active medium and alternating polymer layers of different refractive indices as Bragg mirrors. Enhanced spontaneous emission is produced. The flexible array can be peeled off a substrate, producing a flexible structure that can conform to a wide variety of shapes, and having an emission spectrum that can be mechanically tuned. The flexible array can be used to create a flexible infrared light bandage.

Flexible microcavities through spin coating

A flexible microcavity structure made of organic materials using spin-coating technique for allowing large area structures using a roll-to-roll process. The structure includes at least one first polymer layer, at least one second polymer layer, and a cavity layer. The cavity layer has quantum dots embedded therein for realizing an electrically pumped microcavity emitter. The at least one first polymer layer alternates with the at least one second polymer layer, respectively, to form a pair of distributed Bragg reflecting mirrors. The cavity layer is sandwiched between the pair of distributed Bragg reflecting mirrors.

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Kerala, India

Nikesh V Valappil