The Experts below are selected from a list of 44832 Experts worldwide ranked by ideXlab platform
S.y. Chou - One of the best experts on this subject based on the ideXlab platform.
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A novel device for detecting the Polarization Direction of linear polarized light using integrated subwavelength gratings and photodetectors
IEEE Photonics Technology Letters, 1997Co-Authors: E. Chen, S.y. ChouAbstract:A solid-state device that can be used to detect the Polarization Direction of linear polarized light is proposed. The device consists of six transmission gratings with periods in the subwavelength region of the incident light and six photodetectors integrated separately underneath each grating. A variable, defined through the photocurrent ratios of the grating-photodetector pairs, shows a one-to one correspondence with the angle between the electric vector of the incident linear polarized light and the orientation of the gratings' fingers, which is therefore used to determine the Polarization Direction. An angular resolution of 0.2/spl deg/ can be achieved.
E. Chen - One of the best experts on this subject based on the ideXlab platform.
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A novel device for detecting the Polarization Direction of linear polarized light using integrated subwavelength gratings and photodetectors
IEEE Photonics Technology Letters, 1997Co-Authors: E. Chen, S.y. ChouAbstract:A solid-state device that can be used to detect the Polarization Direction of linear polarized light is proposed. The device consists of six transmission gratings with periods in the subwavelength region of the incident light and six photodetectors integrated separately underneath each grating. A variable, defined through the photocurrent ratios of the grating-photodetector pairs, shows a one-to one correspondence with the angle between the electric vector of the incident linear polarized light and the orientation of the gratings' fingers, which is therefore used to determine the Polarization Direction. An angular resolution of 0.2/spl deg/ can be achieved.
Kelin Gao - One of the best experts on this subject based on the ideXlab platform.
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Relationship measurement between ac-Stark shift of 40 Ca + clock transition and laser Polarization Direction *
Chinese Physics B, 2017Co-Authors: Hong-fang Song, Shao-long Chen, Meng-yan Zeng, Yao Huang, Hu Shao, Yong-bo Tang, Hua Guan, Kelin GaoAbstract:Ac-Stark shift of atom levels is caused by an ac-electromagnetic field. As an electromagnetic wave, laser light does induce ac-Stark shift. It is proved experimentally that if the light is linearly polarized, the dynamic polarizability changes with Polarization Direction. The Polarization Direction of the linearly-polarized laser is tuned by 720 degrees, and the ac-Stark shifts of the 4S(1/2), m = (+/- 1/2) -> 3D(5/2), (m = +/- 1/2) clock transitions in Ca-40(+) are measured in steps of 10 degrees. The frequency shifts change with laser Polarization in a periodical manner and have values opposite to each other.
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relationship measurement between ac stark shift of 40 ca clock transition and laser Polarization Direction
Chinese Physics B, 2017Co-Authors: Hong-fang Song, Shao-long Chen, Meng-yan Zeng, Yao Huang, Hu Shao, Yong-bo Tang, Hua Guan, Kelin GaoAbstract:Ac-Stark shift of atom levels is caused by an ac-electromagnetic field. As an electromagnetic wave, laser light does induce ac-Stark shift. It is proved experimentally that if the light is linearly polarized, the dynamic polarizability changes with Polarization Direction. The Polarization Direction of the linearly-polarized laser is tuned by 720 degrees, and the ac-Stark shifts of the 4S(1/2), m = (+/- 1/2) -> 3D(5/2), (m = +/- 1/2) clock transitions in Ca-40(+) are measured in steps of 10 degrees. The frequency shifts change with laser Polarization in a periodical manner and have values opposite to each other.
Liangshu Wang - One of the best experts on this subject based on the ideXlab platform.
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Shear wave splitting across the Ailao Shan‐Red River fault zone, SW China
Geophysical Research Letters, 2007Co-Authors: Zhouchuan Huang, Liangshu Wang, Jianhua Liu, Shao-wen LiuAbstract:[1] A broad band seismic array was set up across the Ailao Shan-Red River (ASRR) fault zone, SW China. The shear wave splitting parameters on SKS and SKKS phases are calculated using the method of Silver and Chan (1991) and indicate the Polarization Direction of 105 ± 6° and the delay time of 1.68 ± 0.44 s beneath the ASRR fault zone. Combined with previous studies, the average Polarization Direction is 110 ± 19° and the delay time is 1.58 ± 0.44 s to the SW side of the fault, while the values are 83 ± 30° and 1.29 ± 0.29 s to the NE side. This result implies that the upper mantle anisotropy to two sides of the ASRR fault zone are different. Compared with the SE Polarization Direction observed in the P-S phase and the N-to-S surface movement in GPS data, our results suggest decoupling of the crust and upper mantle beneath the study region.
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A Study on Crustal Anisotropy Using P to S Converted Phases of Receiver Functions: Application to Ailaoshan-Red River Fault Zone
Chinese Journal of Geophysics, 2006Co-Authors: Liangshu Wang, Jianhua Liu, Kai Zhong, Wei‐wei TongAbstract:Although both dipping boundary and anisotropy can cause significant energy in transverse component of receiver functions, they are distinguishable in the arrival time and period. According to different periodicities of transverse components, characteristic anisotropy or dipping boundary can be enhanced by weighted stacking method, and splitting parameters can be inferred from related waveform analysis. As an example, we studied crustal anisotropy near the Red River Fault using P to S converted phases of receiver function. The receiver functions are derived from four broadband digital seismic stations near the Red River Fault. The fast Polarization Direction is 132° with a time delay of 0.24s. The fast Polarization Direction in crust is consistent with tectonic line of this region but nearly perpendicular to the fast Polarization Direction of upper mantle, indicating that the crust and upper mantle may be de-coupled near the Red River Fault.
Wen Wu - One of the best experts on this subject based on the ideXlab platform.
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cavity based linear polarizer immune to the Polarization Direction of an incident plane wave
Optics Letters, 2016Co-Authors: Jiang Wang, Zhongxiang Shen, Wen WuAbstract:We herein report a linear polarizer based on a 2D array of substrate integrated waveguide cavities, which can convert an arbitrary linearly polarized (LP) incident wave into an outgoing LP wave in a specified Polarization Direction with constant transmittance. Two orthogonal slots etched on the front surface of the cavity are utilized to couple a wave of arbitrary Polarization into the cavity, while another slot on the back side helps to couple the field out along a desired Polarization Direction. Microwave experiments are performed as a proof of concept. The proposed polarizer exhibits very good performance with stable transmittance as 50% and a Polarization extinction ratio over 45 dB. The new polarizer is potentially useful in novel Polarization-selective devices that are immune to the Polarization Direction of an incident plane wave.
