Fabrication and analysis of a three-layer stratified volume diffractive optical element high-efficiency grating

Polarization volume grating with high efficiency and large diffraction angle.

We propose a polarization volume grating (PVG), which exhibits nearly 100% diffraction efficiency and large diffraction angle. Both reflective and transmissive PVGs can be configured depending on application preference. Such a PVG is polarization-sensitive so that it can split an incident unpolarized beam into two well-separated yet polarized beams. These outstanding features make PVG a strong ...

High Efficiency Volume Diffractive Elements in Photo-Thermo-Refractive Glass

Fabrication of the Crystalline ITO Pattern by Picosecond Laser with a Diffractive Optical Element

This study presents the fabrication of crystalline indium tin oxide (c-ITO) patterns on glass substrate using laser-induced crystallization followed by chemical etching. In the proposed approach, an amorphous ITO (a-ITO) thin film was transformed into a c-ITO structure over a predetermined area using infrared picosecond fiber laser irradiation with a 500 kHz repetition rate, under a single lase...

‏‎a phonological contrastive analysis of kurdish and english‎‏

deposite the different criticisms on contrastive analysis it has been proved that the results of it(when processed)can be usuful in a tefl environment,specially at the level of phonology.this study is an attempt to compare and contrast the sound systems of kurdish and english for pedagogical aims. the consonants,vowels,stress and intonation of the twolanguages are described by the same model-ta...

Design and fabrication of the diffractive phase element that synthesizes three-color pseudo-nondiffracting beams

Jyh-Rou Sze Mao-Hong Lu, MEMBER SPIE National Chiao-Tung University Institute of Electro-Optical Engineering 1001 Ta-Hsueh Road, Hsin-Chu 300 Taiwan, Republic of China (ROC). E-mail: [email protected] Abstract. The experimental implementation of the diffractive phase element (DPE) that synthesizes three-color psudo-nondiffracting beams (PNDBs) is described. This DPE is designed with the amp...