Publications related to Methods for engineering polar discontinuities in non-centrosymmetric honeycomb lattices and devices including a two-dimensional insulating material and a polar discontinuity of electric polarization

Exciton-polariton spin switches

Integrated switching devices comprise the building blocks of ultrafast optical signal processing(1,2). As the next stage following intensity switching(1,3,4), circular polarization switches(5-9) are attracting considerable interest because of their applica ...

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

Lattice-matched GaN-InAlN waveguides at lambda=1.55 mu m grown by metal-organic vapor phase epitaxy

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Sylvain Nicolay, Mauro Mosca

We report on the demonstration of low-loss, single-mode GaN-InAlN ridge waveguides (WGs) at fiber-optics telecommunication wavelengths. The structure grown by metal-organic vapor phase epitaxy contains AlInN cladding layers lattice-matched to GaN. For slab ...

2008

Excited excitonic states observed in semiconductor quantum dots using polarization resolved optical spectroscopy

Elyahou Kapon, Alok Rudra, Daniel Oberli, Valentina Troncale

We present results on the polarization-resolved photoluminescence emitted from InGaAs/AlGaAs single quantum dots (QDs) grown in inverted tetrahedral pyramids. The emitted light was detected for two mutually perpendicular linear polarization directions in t ...

American Institute of Physics2007

Three-dimensional ferroelectric domain imaging of bulk Pb(Zr,Ti)O-3 by atomic force microscopy

Nava Setter, Enrico Colla

We report on the ferroelectric domain evolution as a function of the depth of the surface of 100 mum thick bulk Pb(Zr,Ti)O-3 (PZT) doped with 2% Nb. Ferroelectric domain imaging (FDI) was performed by piezoelectric detection assisted by atomic force micros ...

2004

Transforming the feature vectors to improve HMM based cursive word recognition systems

Samy Bengio, Alessandro Vinciarelli

Although many Offline Cursive Word Recognition systems are based on HMMs, no attention was ever paid, to our knowledge, to the fact that the feature vectors are typically not in the most suitable form for modeling. They are most of the time correlated and ...

IDIAP2002

PCA in Autocorrelation Space

Jean-Philippe Thiran, Vlad Popovici

The use of higher order autocorrelations as features for pattern classification has been usually restricted to second or third orders due to high computational costs. Since the autocorrelation space is a high dimensional space we are interested in reducing ...

SPIE2002

Analysis of phase measurements in combined interferometer and polarimeter systems

Roland Behn

Combined interferometer and polarimeter systems, using a single detecting element per line of sight, are susceptible to perturbation of the interferometric phase when modulation of the polarization vector is applied. This issue has been investigated extens ...

1998

Direct observation of region by region suppression of the switchable polarization (fatigue) in Pb(Zr,Ti)O-3 thin film capacitors with Pt electrodes

Nava Setter, Alexander Tagantsev, Enrico Colla

The size, shape, and polarization orientation of fatigued areas formed during the suppression of the switchable polarization (P-r(s)) (fatigue) in Ft-FZT-Pt ferroelectric capacitors (FECAPs), were observed by means of atomic force microscopy and by imaging ...

1998

Polarization quadrature measurement of subwavelength diffracting structures

Demetri Psaltis

The amplitude and the phase of the diffracted far field depends on polarization when the diffracting structure is comparable to or less than the wavelength. When the far-field amplitude and the phase of one polarization with respect to the orthogonal polar ...

1997

Methods for engineering polar discontinuities in non-centrosymmetric honeycomb lattices and devices including a two-dimensional insulating material and a polar discontinuity of electric polarization

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Exciton-polariton spin switches

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

Lattice-matched GaN-InAlN waveguides at lambda=1.55 mu m grown by metal-organic vapor phase epitaxy

Excited excitonic states observed in semiconductor quantum dots using polarization resolved optical spectroscopy

Three-dimensional ferroelectric domain imaging of bulk Pb(Zr,Ti)O-3 by atomic force microscopy

Transforming the feature vectors to improve HMM based cursive word recognition systems

PCA in Autocorrelation Space

Analysis of phase measurements in combined interferometer and polarimeter systems

Direct observation of region by region suppression of the switchable polarization (fatigue) in Pb(Zr,Ti)O-3 thin film capacitors with Pt electrodes

Polarization quadrature measurement of subwavelength diffracting structures

Lattice-matched GaN-InAlN waveguides at lambda=1.55 mu m grown by metal-organic vapor phase epitaxy

Transforming the feature vectors to improve HMM based cursive word recognition systems

Excited excitonic states observed in semiconductor quantum dots using polarization resolved optical spectroscopy

PCA in Autocorrelation Space

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

Analysis of phase measurements in combined interferometer and polarimeter systems

Exciton-polariton spin switches

Three-dimensional ferroelectric domain imaging of bulk Pb(Zr,Ti)O-3 by atomic force microscopy

Polarization quadrature measurement of subwavelength diffracting structures

Direct observation of region by region suppression of the switchable polarization (fatigue) in Pb(Zr,Ti)O-3 thin film capacitors with Pt electrodes