Three-dimensional birefringence imaging with a microscope tilting-stage. I. Uniaxial crystals

One-Dimensional design of a three-stage axial compressor with Its 3D numerical simulation

The purpose of this study is to design a three-stage axial compressor with identical pressure ratio which makes an adequate pressure ratio and efficiency in design point conditions with rotational velocity of 38000rpm and mass flow rate of 3.2kg/s. First of all, considering some restrictions such as Dehaller number more than 0.7 in all sections of the stator and the rotor, and relative Mach num...

Three-Dimensional Photonic Crystals

Principle Investigators: Georg von Freymann and Martin Wegener CFN-Financed Scientists: C. Becker (3/4 BAT IIa, 4 months), Markus Deubel (3/4 BAT IIa, 9 months), Martin Hermatschweiler (3/4 BAT IIa, 14.5 months), Nina Meinzer (3/4 BAT IIa, 1 month), Daniel Meisel (3/4 BAT IIa, 5.5 months), Michael S. Rill (3/4 BAT IIa, 32 months), Isabelle Staude (3/4 BAT IIa, 14 months) On average, this corres...

A three-dimensional electron spin resonance microscope

An electron spin resonance (ESR) imaging system, capable of acquiring three-dimensional (3D) images with a resolution of ,10310330 mm in a few minutes of acquisition, is presented. This ESR microscope employs a commercial continuous wave ESR spectrometer, working at 9.1 GHz, in conjunction with a miniature imaging probe (resonator+gradient coils), gradient current drivers, and control software....

Uniaxial three-dimensional shape measurement with projector defocusing

Large birefringence in two-dimensional silicon photonic crystals

We report an experimental and theoretical study of the birefringence of two-dimensional photonic crystals in the spectral region below the first photonic band gap. Transmission spectroscopy is used to measure the birefringence of a sample composed of a triangular lattice of air cylinders in silicon, with a cylinder radius of 0.644 mm and a lattice pitch of 1.5 mm. The measured birefringence ~de...