Publications de Luca Alex Milo Sulmoni

Static and dynamic characteristics of InGaN-based laser diodes

EPFL2014

Static and dynamic properties of multi-section InGaN-based laser diodes

Nicolas Grandjean, Jean-François Carlin, Julien Dorsaz, Antonino Francesco Castiglia, Jean-Michel Jacques Lamy, Dmitri Boiko, Luca Alex Milo Sulmoni, Xi Zeng

We have studied multi-section InGaN multiple-quantum-well (MQW) laser diodes grown on c-plane freestanding GaN substrate consisting of an absorber section (AS) and an amplifier gain section. As a result of the interplay between external bias applied to the ...

Amer Inst Physics2012

Effect of applied bias voltage on the static and dynamic characteristics of self-pulsating multi-section InGaN-based laser diode

Nicolas Grandjean, Jean-François Carlin, Jean-Michel Jacques Lamy, Dmitri Boiko, Luca Alex Milo Sulmoni, Xi Zeng

Ieee2012

Optical bistability in InGaN-based multisection laser diodes

Nicolas Grandjean, Jean-François Carlin, Julien Dorsaz, Dmitri Boiko, Luca Alex Milo Sulmoni

Optical bistability is observed in cw-operating InGaN-based laser diodes including a saturable absorber (SA) section. The dependence of the light-current hysteresis on the SA section length and reverse bias (VSA) has been studied. An analytical approach is ...

AIP American Institute of Physics2011

Recombination coefficients of GaN-based laser diodes

Nicolas Grandjean, Jean-François Carlin, Julien Dorsaz, Luca Alex Milo Sulmoni

We measure the charge carrier recombination coefficients of InGaN quantum wells by analyzing the dynamical properties of (Al,In)GaN laser diodes emitting in the violet spectral range. Relaxation oscillations and turn-on delays are fitted to a rate equation ...

2011

Self-Pulsation at Zero Absorber Bias in GaN-Based Multisection Laser Diodes

Nicolas Grandjean, Jean-François Carlin, Julien Dorsaz, Luca Alex Milo Sulmoni

We study the influence of pump current and absorber bias voltage on the pulse width and frequency of sustained pulsation in GaN-based multisection laser diodes. The observed frequencies and pulse widths range from 1.5 to 4.5GHz and 90 to 18 ps, respectivel ...

2011

Bias-dependent absorption coefficient of the absorber section in GaN-based multisection laser diodes

Nicolas Grandjean, Jean-François Carlin, Antonino Francesco Castiglia, Luca Alex Milo Sulmoni

We measure the modal absorption coefficient of the InGaN quantum wells (QWs) in the absorber section of (Al,In)GaN multisection laser diodes as a function of bias voltage and photon energy using optical gain-spectroscopy. In the examined laser diodes, the ...

AIP American Institute of Physics2010

Broadband blue superluminescent light-emitting diodes based on GaN

Nicolas Grandjean, Jean-François Carlin, Julien Dorsaz, Eric Feltin, Antonino Francesco Castiglia, Gatien Cosendey, Luca Alex Milo Sulmoni

We report on the achievement of III-nitride blue superluminescent light-emitting diodes on GaN substrates. The epitaxial structure includes an active region made of In0.12Ga0.88N quantum wells in a GaN/AlGaN waveguide. Superluminescence under cw operation ...

2009