Publications related to Optical polarization anisotropy and hole states in pyramidal quantum dots

Experimental Evaluation of the Polarization Crosstalk When Soldering a Polarization-Maintaining Fiber Into a V-Grooved Substrate

The influence of stress on the polarization extinction ratio (PER) when solderjet-bumping a bow-tie polarization-maintaining fiber (PMF) to a V-grooved ceramic substrate is experimentally evaluated. Throughout this paper, the linear polarization of the cou ...

Institute of Electrical and Electronics Engineers2013

Bichiral structure of ferroelectric domain walls driven by flexoelectricity

Nava Setter, Alexander Tagantsev, Petr Yudin

The influence of flexoelectric coupling on the internal structure of neutral domain walls in the tetragonal phase of perovskite ferroelectrics is studied. The effect is shown to lower the symmetry of 180 degrees walls which are oblique with respect to the ...

American Physical Society2012

Physics of Polariton Condensates in GaN-based Planar Microcavities

Jacques Levrat

Since its prediction in 1996 by Imamoğlu and coworkers, the use of a non-equilibrium polariton condensate to produce an intense coherent light source referred to as a polariton laser has attracted a lot of interest in the whole physics community as it ...

EPFL2012

One-dimensional exciton luminescence induced by extended defects in nonpolar GaN/(Al,Ga)N quantum wells

Nicolas Grandjean, Benoît Marie Joseph Deveaud, Raphaël Butté, Jacques Levrat, Pierre Stadelmann, Jean-Daniel Ganière, Denis Martin, Pierre Michel Corfdir, Tiankai Zhu, Yadira Arroyo Rojas Dasilva

In this study, we present the optical properties of nonpolar GaN/(Al,Ga)N single quantum wells (QWs) grown on either a- or m-plane GaN templates for Al contents set below 15%. In order to reduce the density of extended defects, the templates have been proc ...

Institute of Physics2011

Optical Properties of InAs Quantum Dot Array Ensembles with Predetermined Lateral Sizes from 20 to 40 nm

Anna Fontcuberta i Morral, Emanuele Uccelli, Laura Waller

Cleaved edge overgrowth and selective area epitaxy were combined for the synthesis of InAs quantum dot (QD) arrays with lateral sizes from 20 to 40 nm. The optical properties were locally assessed by confocal photoluminescence spectroscopy experiments at l ...

2010

Polarization Properties of Columnar Quantum Dots: Effects of Aspect Ratio and Compositional Contrast

Philipp Ridha

We report a systematic theoretical and experimental investigation of the polarization properties of columnar quantum dots (CQDs) with extremely large aspect ratio and high compositional contrast. A strong variation of the polarization of the dominant inter ...

2010

Tailored-Potential Pyramidal Quantum Dot Heterostructures

Valentina Troncale

Semiconductor quantum dots are usually compared to artificial atoms, because their electronic structure consists of discrete energy levels as for natural atoms. These artificial systems are integrated in solid materials and can be localized with a spatial ...

EPFL2010

Near-field polarization measurements based on two arbitrary, orthogonal optical field components

Olivier Martin, Hans Peter Herzig, Libo Yu, Tristan Sfez, Daniele Brunazzo, Francesco Michelotti

Using a multi-heterodyne scanning near-field optical microscope, we detect two arbitrary, orthogonal components of the near field. A numerical treatment of the experimental data allows the retrieval of the transverse and longitudinal components of the mode ...

2010

Instrument-independent specification of the diffraction geometry and polarization state of the incident X-ray beam

This work augments the proposal of Schwarzenbach & Flack [J. Appl. Cryst. (1989), 22, 601-605], who have advocated the use of a diffractometer-independent definition of the azimuthal angle

\psi

to specify the diffractiongeometry of a Bragg reflection. It ...

2009

Polarization dependence of electroluminescence from closely-stacked and columnar quantum dots

Marco Rossetti, Philipp Ridha

Quantum dots (QDs) have a potential for application in semiconductor optical amplifiers (SOAs), due to their high saturation power related to the low differential gain, fast gain recovery and wide gain spectrum compared to quantum wells. Besides all advant ...

Springer US2008

Optical polarization anisotropy and hole states in pyramidal quantum dots

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Experimental Evaluation of the Polarization Crosstalk When Soldering a Polarization-Maintaining Fiber Into a V-Grooved Substrate

Bichiral structure of ferroelectric domain walls driven by flexoelectricity

Physics of Polariton Condensates in GaN-based Planar Microcavities

One-dimensional exciton luminescence induced by extended defects in nonpolar GaN/(Al,Ga)N quantum wells

Optical Properties of InAs Quantum Dot Array Ensembles with Predetermined Lateral Sizes from 20 to 40 nm

Polarization Properties of Columnar Quantum Dots: Effects of Aspect Ratio and Compositional Contrast

Tailored-Potential Pyramidal Quantum Dot Heterostructures

Near-field polarization measurements based on two arbitrary, orthogonal optical field components

Instrument-independent specification of the diffraction geometry and polarization state of the incident X-ray beam

Polarization dependence of electroluminescence from closely-stacked and columnar quantum dots

Experimental Evaluation of the Polarization Crosstalk When Soldering a Polarization-Maintaining Fiber Into a V-Grooved Substrate

Bichiral structure of ferroelectric domain walls driven by flexoelectricity

Physics of Polariton Condensates in GaN-based Planar Microcavities

Instrument-independent specification of the diffraction geometry and polarization state of the incident X-ray beam

Near-field polarization measurements based on two arbitrary, orthogonal optical field components

One-dimensional exciton luminescence induced by extended defects in nonpolar GaN/(Al,Ga)N quantum wells

Optical Properties of InAs Quantum Dot Array Ensembles with Predetermined Lateral Sizes from 20 to 40 nm

Tailored-Potential Pyramidal Quantum Dot Heterostructures

Polarization dependence of electroluminescence from closely-stacked and columnar quantum dots

Polarization Properties of Columnar Quantum Dots: Effects of Aspect Ratio and Compositional Contrast