中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共9条,第1-9条 帮助

条数/页: 排序方式:
Influence of lithium and silicon coatings on tungsten erosion in arc plasma 期刊论文  OAI收割
JOURNAL OF NUCLEAR MATERIALS, 2021, 卷号: 555
作者:  
Tang, Z. L.;  Zuo, G. Z.;  Li, C. L.;  Huang, M.;  Zhang, X. B.
  |  收藏  |  浏览/下载:62/0  |  提交时间:2021/09/06
Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文  OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者:  
HXMT
  |  收藏  |  浏览/下载:28/0  |  提交时间:2022/02/08
Radio transient sources  Magnetars  Soft gamma-ray repeaters  2008  992  1471  Astrophysics - High Energy Astrophysical Phenomena  Astrophysics - Instrumentation and Methods for Astrophysics  Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of AJ = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 1014 Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to RNIR ? 0.025 (fluence index ?0.35).  
Distinct Excitonic Circular Dichroism between Wurtzite and Zincblende CdSe Nanoplatelets 期刊论文  OAI收割
NANO LETTERS, 2018, 卷号: 18, 期号: 11, 页码: 6665
作者:  
Gao, XQ;  Zhang, XW;  Zhao, LY;  Huang, P;  Han, B
  |  收藏  |  浏览/下载:55/0  |  提交时间:2018/12/29
Broadband tunable external cavity laser using a bent-waveguide quantum-dot superluminescent diode as gain device 期刊论文  OAI收割
chinese physics b, 2011, 卷号: 20, 期号: 6, 页码: art. no. 064202
作者:  
Jin P
收藏  |  浏览/下载:54/4  |  提交时间:2011/07/15
Thermal and polarised spectral properties of Nd3+ doped Li3Ba2Y3(MoO4) crystal 期刊论文  OAI收割
Materials Research Innovations, 2010, 卷号: 14, 期号: 3, 页码: 216-219
M. J. Song, L. Z. Zhang and G. F. Wang
收藏  |  浏览/下载:19/0  |  提交时间:2012/11/02
Temperature characteristics of high power vertical cavity surface emitting lasers (EI CONFERENCE) 会议论文  OAI收割
Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China
作者:  
Qin L.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
By using oxidation confinement technology high power vertical-cavity surface-emitting lasers are fabricated in experiment. The electrical and optical performance characteristics such as threshold current  efficiency  emission wavelength  and output power are measured under continuous wave (CW) condition at room temperature. The maximum output power is up to watt regime at wavelength of about 980nm. The temperature characteristics of the device are investigated experimentally in detail. The variation in lasing threshold current with temperature is studied. The characteristic temperature T0 of the device is derived  and the value is about 211K. Such a high characteristic temperature T0 of threshold current can lead to good temperature sensitivity of the device. At the same time  the lasing spectrum characteristics with temperature are also measured. The wavelength shift with temperature is just about 0.06nm/K. From the measured results  it is shown that the device can still operate at high temperature condition.  
Spectroscopic investigations of Er3+ doped Bi2O 3 -B2O3 -SiO2 glass (EI CONFERENCE) 会议论文  OAI收割
ICO20: Materials and Nanostructures, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Chen B.;  Wang X.;  Wang X.;  Wang X.;  Wang C.
收藏  |  浏览/下载:79/0  |  提交时间:2013/03/25
A novel chiral conjugated polymer whose chiral property has different responses with different metal ions 期刊论文  OAI收割
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE, 2004, 卷号: 25, 期号: 1, 页码: 194-196
作者:  
Bian, Z;  He, YB;  Gao, LX
  |  收藏  |  浏览/下载:25/0  |  提交时间:2019/04/09
Measurement of gain spectrum for Fabry-Perot semiconductor lasers by the Fourier transform method with a deconvolution process 期刊论文  OAI收割
ieee journal of quantum electronics, 2003, 卷号: 39, 期号: 6, 页码: 716-721
作者:  
Yu LJ
收藏  |  浏览/下载:43/0  |  提交时间:2010/08/12