نتایج جستجو برای: near zero refractive index

تعداد نتایج: 790784  

2017

Title: Geometry-invariant Phenomena in Near-zero-index Media. When: Friday, December 15, (2017), 12:00. Place: Department of Theoretical Condensed Matter Physics, Faculty of Science, Module 5, Seminar Room (5th Floor). Speaker: Iñigo Liberal, Department of Electrical and Electronic Engineering, Public University of Navarre, Pamplona, Spain & Department of Electrical and Systems Engineering, Uni...

2017

Title: Geometry-invariant Phenomena in Near-zero-index Media. When: Friday, December 15, (2017), 12:00. Place: Department of Theoretical Condensed Matter Physics, Faculty of Science, Module 5, Seminar Room (5th Floor). Speaker: Iñigo Liberal, Department of Electrical and Electronic Engineering, Public University of Navarre, Pamplona, Spain & Department of Electrical and Systems Engineering, Uni...

2018
Alexandre Tkatchenko

Title: Geometry-invariant Phenomena in Near-zero-index Media. When: Friday, December 15, (2017), 12:00. Place: Department of Theoretical Condensed Matter Physics, Faculty of Science, Module 5, Seminar Room (5th Floor). Speaker: Iñigo Liberal, Department of Electrical and Electronic Engineering, Public University of Navarre, Pamplona, Spain & Department of Electrical and Systems Engineering, Uni...

2015
Xin-Tao He Yao-Nan Zhong You Zhou Zhi-Chao Zhong Jian-Wen Dong

A certain class of photonic crystals with conical dispersion is known to behave as isotropic zero-refractive-index medium. However, the discrete building blocks in such photonic crystals are limited to construct multidirectional devices, even for high-symmetric photonic crystals. Here, we show multidirectional emission from low-symmetric photonic crystals with semi-Dirac dispersion at the zone ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

Journal: :Optics Express 2017

ژورنال: سنجش و ایمنی پرتو 2020

In radiation calorimetry by using laser beams and interferometry setups, variations induced by dose absorption in phantom can be precisely measured. Dose absorption and the induced temperature change result in refractive index variation of the material. In order to be able to measure the low amount of absorbed dose in the phantom, temperature dependence of refractive index of the material must ...

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