نتایج جستجو برای: light coherence

تعداد نتایج: 463424  

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

شفافیت القایی الکترومغناطیسی (eit) که یک پدیده کوانتومی است بر اثر تداخل همدوس نور دو لیزر مختلف هنگام عبور از یک محیط اتمی روی می دهد و منجر به حذف جذب و ایجاد شفافیت در محیط می شود و یکی از اثرات مهم آن کاهش سرعت گروه می باشد. اخیرا پدیده هایی مشابه eit در ساختارهای متامتریال توجه زیادی را به خود جلب کرده است. در این رساله ما ساختار متامتریالی را ارائه داده ایم که در ناحیه مایکرو ویو پدیده ei...

Sabori Negad , M.R,

SUMMARY laser operate on the principle that excited atoms can be stimulated to emit photons, Resulting in a Markedly amplified light that possesses the Unique properties of coherence, Monochromacy and high Intensity. The Nature of this light allows precise alteration of tissues, primarily by photocoagulation and disruption which has been Utilized in several forms of surgery.

Journal: :Optics letters 2014
Renjie Zhou Taewoo Kim Lynford L Goddard Gabriel Popescu

We present a new wave-vector-space approach for solving inverse scattering problems. In our formulation, the theories for diffraction tomography and coherence gating are combined to explain 3D reconstruction with low-coherence light. Specifically, we apply this method to solve the scattering problem with broadband fields for transmission and reflection measurements. Our results can be applied t...

2016

As an elementary particle, the electron cannot be broken down into smaller particles, at least as far as is currently known. However, in a phenomenon called electron fractionalization, in certain materials an electron can be broken down into smaller "charge pulses," each of which carries a fraction of the electron's charge. Although electron fractionalization has many interesting implications, ...

Journal: :Photonics 2021

Through a computational model, we study the coherence converting capabilities of an array holes in surface plasmon-supporting metal plate, with eye towards creation controlled plasmonic light sources. We evaluate how average and transmission hole depends on parameters array, such as geometry, lattice constant, size. show that location bandgaps resonances can be estimated through simple formula ...

2006
Li-Gang Wang Cheng-Liang Zhao Li-Qin Wang Shi-Yao Zhu

The radiation forces on a Rayleigh dielectric sphere induced by a partially coherent light beam are greatly affected by the coherence of the light beam. The magnitude of the radiation forces on a dielectric sphere near the focus point greatly decreases as the coherence decreases. For the light beam with good coherence, the radiation force may be used to trap a particle; and for the light beam w...

Journal: :ادیان و عرفان 0
عباس یزدانی دانشیار گروه فلسفة دین دانشگاه تهران حکیمه یوسف پور کارشناسی ارشد فلسفة دین دانشگاه تهران

one of the approaches which defends the rationality of religious beliefs is the reformed epistemology. among reformed epistemologists, wolterstorff’s view is subject to less criticism. this article tries to present epistemological foundations of wolterstorff’s view by describing and analyzing the statements which he has offered in his works. wolterstorff’s epistemological foundations are explai...

2012
Eneas N. Morel Jorge R. Torga

Low coherence interferometry (LCI) is an optical technique in which light is used as an instrument to obtain high resolution optical images in a great diversity of materials. It is possible to find in the literature, a variety of configurations with different names, based on the same principle: low coherence reflectometry (OLCR), optical coherence tomography (OCT), white light interferometry (W...

Journal: :Journal of the Optical Society of America A 2010

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