Antonino Francesco Castiglia

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Suppression of leakage currents in GaN-based LEDs induced by reactive-ion etching damages

Nicolas Grandjean, Jean-François Carlin, Julien Dorsaz, Eric Feltin, Antonino Francesco Castiglia, Mauro Mosca

Forward and reverse leakage currents in GaN/InGaN multi-quantum well light-emitting diodes (LEDs) are caused by reactive-ion etching (RIE) damages during device patterning. A method to recover the damaged surfaces, based on a chemical etch in KOH: ethylene ...

2008

Large vacuum Rabi splitting in a multiple quantum well GaN-based microcavity in the strong-coupling regime

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Eric Feltin, Gabriel Christmann, Antonino Francesco Castiglia, Pierre Stadelmann, Anas Mouti

An AlInN/AlGaN microcavity (MC) containing a GaN/Al0.2Ga0.8N multiple quantum well (MQW) structure is investigated through room temperature (RT) photoluminescence and reflectivity experiments. A vacuum Rabi splitting as large as 50 meV at RT is reported fo ...

2008

Blue laser diodes including lattice-matched Al0.83In0.17N bottom cladding layer

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Julien Dorsaz, Eric Feltin, Antonino Francesco Castiglia, Gatien Cosendey

A report is presented on InGaN/GaN multiple quantum well laser diodes, grown by metal organic vapour phase epitaxy on c-plane sapphire substrates, including an Al0.83In0.17N cladding layer lattice-matched to GaN. Lasing action is demonstrated for gain-guid ...

2008

Efficient current injection scheme for nitride vertical cavity surface emitting lasers

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Julien Dorsaz, Eric Feltin, Antonino Francesco Castiglia, Dobri Simeonov

The authors report the realization of InGaN/GaN light emitting diodes (LEDs) with an electrical injection design suitable for vertical cavity surface emitting lasers. Controlled oxidation of an AlInN interlayer lattice matched to GaN allows confining the i ...

2007

Blue lasing at room temperature in high quality factor GaN/AlInN microdisks with InGaN quantum wells

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Eric Feltin, Antonino Francesco Castiglia, Mauro Mosca, Dobri Simeonov, Tiankai Zhu

The authors report on the achievement of optically pumped III-V nitride blue microdisk lasers operating at room temperature. Controlled wet chemical etching of an AlInN interlayer lattice matched to GaN allows forming inverted cone pedestals. Whispering ga ...

2007

Current status of AlInN layers lattice-matched to GaN for photonics and electronics

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Julien Dorsaz, Eric Feltin, Gabriel Christmann, Antonino Francesco Castiglia, Sylvain Nicolay, Marcel Py, Marcus Gonschorek

We report on the current properties of Al1-x InxN (x approximate to 0.18) layers lattice- matched ( LM) to GaN and their specific use to realize nearly strain- free structures for photonic and electronic applications. Following a literature survey of the g ...

2007

Blue lasing at room temperature in an optically pumped lattice-matched AlInN/GaN VCSEL structure

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Julien Dorsaz, Eric Feltin, Gabriel Christmann, Antonino Francesco Castiglia

Laser action with low threshold average pump power density (similar to 50 W. cm(-2)) at room temperature is reported for a crack-free planar vertical cavity surface emitting laser (VCSEL) structure based on a bottom lattice-matched AllnN/GaN distributed Br ...

2007

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