Article comprising microcavity light sources

TL;DR: In this paper, a flat panel display that comprises many pixels, each pixel comprising at least three different microcavity emitters is presented. And the filler layer is a filler layer, of thickness selected to provide to a given microcanavity the desired optical length.

Abstract: Apparatus according to the invention comprises at least two optical microcavity light emitters. Each one of the at least two light emitters comprises spaced apart reflectors that define a microcavity, and further comprises organic material that is capable of electro-luminescence (e.g., tris (8-hydroxyquinolinol) aluminum, commonly referred to as "Alq"), and means for applying an electric field across the organic material. One of the at least two microcavities has effective optical length L 1 , and the other microcavity has effective optical length L 2 ≠L 1 , with the optical lengths selected such that one of the microcavities emits radiation of a first color (e.g., red), and the other microcavity emits radiation of a second color (e.g., green). In many cases there will be present also a third microcavity that emits radiation of a third color (e.g., blue). In preferred embodiments there is present within the microcavities a filler layer, of thickness selected to provide to a given microcavity the desired optical length. A preferred embodiment of the invention is a full color flat panel display that comprises many pixels, each pixel comprising at least three different microcavity emitters. Other contemplated embodiments are a LED printer, an optical interconnect and an optical fiber communication system.