Colour fidelity for picture gallery illumination, Part 1: Determining the optimum light-emitting diode spectrum

Josephson light-emitting diode.

We consider an optical quantum dot where an electron level and a hole level are coupled to respective superconducting leads. We find that electrons and holes recombine producing photons at discrete energies as well as a continuous tail. Further, the spectral lines directly probe the induced superconducting correlations on the dot. At energies close to the applied bias voltage eV(sd), a paramete...

Light-emitting Diode Polymerization: a Review of Performance, Part Ii

Several important properties associated with light-emitting diode (LED) polymerization lights and dental materials treated using LED technology, such as compressive and flexural strength, bond strength, temperature rise, power density, and material thickness and opacity, have been reviewed in this paper.

Resonant cavity light-emitting diode

A novel concept of a light-emitting diode (LED) is proposed and demonstrated in which the active region of the device is placed in a resonant optical cavity. As a consequence, the optical emission from the active region is restricted to the modes of the cavity. Resonant cavity light-emitting diodes (RCLED) have higher spectral purity and higher emission intensity as compared to conventional lig...

Diffusion injected light emitting diode

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Lauri Riuttanen Name of the doctoral dissertation Diffusion injected light emitting diode Publisher School of Electrical Engineering Unit Department of Microand Nanosciences Series Aalto University publication series DOCTORAL DISSERTATIONS 213/2015 Field of research Optoelectronics Manuscript submitted 10 August 2015 Date of t...

Light emitting diode microscope illumination for green fluorescent protein or fluorescein isothiocyanate epifluorescence.