Quantum Dots Shed Light on Diagnoses

Quantum dots shed light on diagnoses.

Featured article: Kim S, Lim YT, Soltesz EG, De Grand AM, Lee J, Nakayama A, Parker JA, Mihaljevic T, Laurence RG, Dor DM, Cohn LH, Bawendi MG, Frangioni JV. Near-infrared fluorescent type II quantum dots for sentinel lymph node mapping. Nat Biotechnol 2004;22:93–7. Near-infrared (NIR) (700 –2500 nm) in vivo imaging with semiconductor quantum dots (QDs) can offer nonradioactive extraction of me...

A Quantum of Light Shed on Classical Potentials and Fields*

The classical theory of retarded electromagnetic potentials is usually attributed to Liénard (1898) and Wiechert (1900), who developed a mathematical model based on Euclidean geometry and general signal retardation analogous to that occurring with light propagation. The Liénard-Wiechert model represents the amalgamation of dual concepts: the discrete particle (the source) and the continuous wav...

Investigation of the Effect of Recombination on Superluminescent Light-Emitting Diode Output Power Based on Nitride Pyramid Quantum Dots

In this article, the temperature behavior of output power of superluminescent light-emitting diode (SLED) by considering the effect of non-radiative recombination coefficient, non-radiative spontaneous emission coefficient and Auger recombination coefficients has been investigated. For this aim, GaN pyramidal quantum dots were used as the active region. The numerical method has been used to sol...

Will Advances in Quantum Computing Shed Light on Foundational Issues in Quantum Mechanics?

Broadband light sources based on InAs/InGaAs metamorphic quantum dots

We propose a design for a semiconductor structure emitting broadband light in the infrared, based on InAs QDs embedded into a metamorphic step-graded InxGa1-xAs buffer. We developed a model to calculate metamorphic QD energy levels based on realistic QD parameters and on straindependent material properties and we validated results of simulations by comparison with experimental values. On this b...