First time III-nitride photonic crystals

III-nitride photonic crystals

III-nitride blue and ultraviolet photonic crystal light emitting diodes

We present results on enhancement of 460 nm blue and 340 nm UV optical power output in III-nitride light emitting diodes ~LEDs! using photonic crystals ~PCs! under current injection. Triangular arrays of the PCs with diameter/periodicity of 300/700 nm were patterned using electron-beam lithography and inductively coupled plasma dry etching. The total power at 20 mA of 3003300 mm unpackaged LED ...

Recent Advances in III-Nitride Ultraviolet Photonic Materials and Devices

This paper summarizes some of the recent advances made on III-nitride ultraviolet photonics materials and devices. In particular, the growth and characterization of AlGaN alloys are discussed in detail. It was shown that AlGaN could be made n-type for x up to 1 (pure AlN). Time-resolved photoluminescence (PL) studies carried out on these materials have shown that Si-doping reduces the effect of...

Hydrogenated amorphous silicon nitride photonic crystals for improved-performance surface electromagnetic wave biosensors

We exploit the properties of surface electromagnetic waves propagating at the surface of finite one dimensional photonic crystals to improve the performance of optical biosensors with respect to the standard surface plasmon resonance approach. We demonstrate that the hydrogenated amorphous silicon nitride technology is a versatile platform for fabricating one dimensional photonic crystals with ...

Superparamagnetic Photonic Crystals

tion. Conversely, a semi-rigid, optimized acentric organization results in coherent second harmonic emission at the supramolecular level, the corresponding intensity from the dendrimer solution being almost proportional to Nmonomerábmonomerñ. The Nmonomer dependence assumes a linear additive model, whereby the individual sub-units follow an interaction-free oriented gas behavior. We have, there...