نتایج جستجو برای: element circularly polarized

تعداد نتایج: 240627  

2012
Xiwen Chen Zufang Huang Shangyuan Feng Jinhua Chen Lan Wang Peng Lu Haishan Zeng Rong Chen

Polarized surface-enhanced Raman scattering (SERS) spectroscopy was applied for obtaining biochemical information about the seminal plasma. The effect of different laser polarizations (nonpolarized, linear-polarized, right-handed circularly polarized, and left-handed circularly polarized) on seminal plasma SERS spectroscopy was explored for the first time. The diagnostic performance in differen...

2016
M. Tahir Q. Y. Zhang U. Schwingenschlögl

We theoretically demonstrate versatile electronic properties of germanene monolayers under circularly, linearly, and elliptically polarized light. We show for the high frequency regime that the edge states can be controlled by tuning the amplitude of the light and by applying a static electric field. For circularly polarized light the band gap in one valley is reduced and in the other enhanced,...

2000
Pawel Kabacik Marcin Rybakowski Krzysztof Wincza

In many areas of wireless communications and radar, there is a fast growing demand for antennas to be highly integrated with microwave sub-systems. To achieve this task, there is a considerable interest in reduced-size antennas. However, reducing the antenna size works against operational bandwidth. In particular, a significant challenge is faced when circular polarization has to be accomplishe...

Journal: :Chemical communications 2016
Yizhuo He Keelan Lawrence Whitney Ingram Yiping Zhao

A new strategy to improve the sensing ability of localized surface plasmon resonance sensors is presented. By employing chiral plasmonic nanostructures, circularly polarized differential transmittance can show enhanced sensing performance over circularly polarized transmittance under certain conditions.

2016
Feng Lu Jongwon Lee Aiting Jiang Seungyong Jung Mikhail A. Belkin

Polarimetric imaging is widely used in applications from material analysis to biomedical diagnostics, vision and astronomy. The degree of circular polarization, or light ellipticity, is associated with the S3 Stokes parameter which is defined as the difference in the intensities of the left- and right-circularly polarized components of light. Traditional way of determining this parameter relies...

Journal: :Physical review letters 2002
G Fibich B Ilan

We derive a new system of equations that describes the propagation of circularly polarized laser beams in a Kerr medium. Analysis and simulations of this system show that multiple filamentation is suppressed for circularly polarized beams.

Journal: :Optics letters 2007
P S Kuo K L Vodopyanov M M Fejer X Yu J S Harris D F Bliss D Weyburne

We demonstrate an optical parametric oscillator (OPO) based on GaAs pumped with linearly polarized and circularly polarized light and show that the relative OPO thresholds agree with theoretical expectations. For the circularly polarized pump, the threshold was as low as for the [111]-linearly polarized pump case. The pump was also passed through a Lyot depolarizer to produce pseudo-depolarized...

Journal: :Optics express 2010
Man Xu Dick K G de Boer Chris M van Heesch Arthur J H Wachters H Paul Urbach

Polarization gratings can be realized by polarization holographic recording in photoanisotropic materials. In this paper, we study two types of polarization gratings. One is recorded with two orthogonally circularly (OC) polarized beams and the other one with two orthogonally linearly (OL) polarized beams. The interference of both cases is explored beyond the small recording angle regime. A nov...

2017
Jérémy R. Rouxel Markus Kowalewski Shaul Mukamel

Recently developed circularly polarized X-ray light sources can probe the ultrafast chiral electronic and nuclear dynamics through spatially localized resonant core transitions. We present simulations of time-resolved circular dichroism signals given by the difference of left and right circularly polarized X-ray probe transmission following an excitation by a circularly polarized optical pump w...

Journal: :Physical review letters 2016
Christopher A Mancuso Kevin M Dorney Daniel D Hickstein Jan L Chaloupka Jennifer L Ellis Franklin J Dollar Ronny Knut Patrik Grychtol Dmitriy Zusin Christian Gentry Maithreyi Gopalakrishnan Henry C Kapteyn Margaret M Murnane

Atoms undergoing strong-field ionization in two-color circularly polarized femtosecond laser fields exhibit unique two-dimensional photoelectron trajectories and can emit bright circularly polarized extreme ultraviolet and soft-x-ray beams. In this Letter, we present the first experimental observation of nonsequential double ionization in these tailored laser fields. Moreover, we can enhance or...

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