Massachusetts Institute of Technology

Elizabeth R Young

Vladimir Bulovic

Jonathan R Tischler

Daniel G Nocera

The disclosed device is a solid state organic semiconductor VCSEL in which the microcavity is composed of metal and dielectric mirrors and the gain layer is only &#x3bb;/2n thick. The gain layer comprises a thermally evaporated 156.7 nm thick film of the laser dye DCM doped (2.5% v/v) into an Alqhost matrix. The microcavity consists of 2 mirrors, a dielectric Bragg reflector (DBR) sputter-coated onto a quartz substrate as the mirror through which the organic gain layer is optically excited and laser emission is collected and a silver mirror that is thermally evaporated on top of the Alq:DCM film. The device exhibits laser action from the DCM both when the DCM molecules are excited directly at 535 nm and via F&#xf6;rster Resonance Energy Transfer (FRET) from the Alq(excited at 404 nm) with laser thresholds of 4.9 &#x3bc;J/cmand 14.2 &#x3bc;J/cmrespectively.

Growing community of inventors

Cambridge, MA, United States of America

Elizabeth R Young