Concept

Optical phenomenon

Related publications (87)

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

(Y0.5Lu0.5)2O3:Eu3+ nanopowders: Combustion synthesis, structure and optical properties

Barbora Bártová

In this work we explored the possibility of obtaining nanocrystalline (Y0.5Lu0.5)2O3 powders, doped with europium and co-doped with praseodium, employing polymer complex solution synthesis. Polyethylene glycol, with average molecular weight 200, served bot ...

2010

Infrared investigation of the phonon spectrum in the frustrated spin cluster compound FeTe2O5Cl

László Forró, Helmuth Berger

We present our optical investigations on the frustrated spin cluster compound FeTe2O5Cl, which develops a long-range antiferromagnetic order below 10 K. We measure the optical reflectivity from the far-infrared to the ultraviolet with polarized light. We f ...

2009

Synthesis and optical investigation of single polar GaN/AlN quantum dots

Dobri Simeonov

Over the past few decades, III-V nitrides have attracted much attention due to the possibility to realize high efficiency optoelectronic devices covering all the UV and visible part of the light spectrum. However, the device fabrication has gone much faste ...

EPFL2009

Brillouin Distributed Fibre Sensing: State of the Art and Perspectives

Luc Thévenaz

Developed societies require more and more information for their safety and for their economic development. Recent disasters due to landslides, fires in tunnels and collapses of bridges are a source of serious concern on the part of the public which seeks f ...

Materials Research Society of Singapore2009

Lithium niobate nanowires synthesis, optical properties, and manipulation

Demetri Psaltis, László Forró, Arnaud Magrez, Ye Pu, Rachel Grange, Chia-Lung Hsieh, Jae-Woo Choi, Rita Smajda

Free-standing lithium niobate nanowires (LiNbO3) are synthesized by the hydrothermal route. The polarization response of the second harmonic generation (SHG) signal is measured in a single nanowire and used to identify the crystal orientation by matching w ...

2009

Tailoring of Optical Properties of Alumina films deposited by High Vacuum CVD (HV-CVD)

Patrik Willi Hoffmann, Yury Kuzminykh, Xavier Multone, Bamdad Afra

The deposition of amorphous alumina (Al2O3) films on four inch wafers with high deposition rate (up to 50 nm/min) by an advanced HV-CVD technique is discussed. Amorphous nature of the films is confirmed by X-ray diffraction. Refractive index of the deposit ...

ECS - The Electrochemical Society2009

A Micro-Electrode Array device coupled to a laser-based system for the local stimulation of neurons by optical release of glutamate

Diego Ghezzi

Optical stimulation is a promising approach to investigate the local dynamic responses of cultured neurons. In particular, flash photolysis of caged compounds offers the advantage of allowing the rapid change of concentration of either extracellular or int ...

Elsevier2008

Nonpolar GaN-based microcavity using AlN/GaN distributed bragg reflector

Nicolas Grandjean, Raphaël Butté, Eric Feltin, Gabriel Christmann, Denis Martin, Tiankai Zhu

Nonpolar GaN based microcavity (MC) made of a bottom AlN/GaN distributed Bragg reflector (DBR) and a top dielectric SiO2/SiNx DBR has been fabricated on a-plane GaN template. The 13 pair AlN/GaN DBR, centered around 372 nm, exhibits a peak reflectivity of ...

2008

Kubelka-Munk model for imperfectly diffuse light distribution in paper

Roger Hersch, Lin Yang

Perfectly diffuse light is a fundamental assumption in the Kubelka-Munk (KM) modeL This assumption is, however seldom fulfilled by real media. In this work, we build a bridge between a weakly absorbing medium with an imperfectly diffuse light distribution ...

2008

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