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	Influence of high temperature annealing in nitrogen on upconversion luminescence of -NaYF4: Yb3+, Er3+ hexagonal sub-microplates (EI CONFERENCE) 会议论文 OAI收割 2012 International conference on Function Materials and Nanotechnology, FMN 2012, May 19, 2012 - May 20, 2012, Zhengzhou, China 作者: Zhao J. 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/25 The pure -NaYF4: Yb3+ Er3+ hexagonal sub-microplates were successfully prepared by the combination of coprecipitation and hydrothermal methods using sodium citrate as chelator. The size of them is about 600 nm 400 nm (side length thickness). The obtained sample was divided into two parts and one of them was annealed in nitrogen at 300 C for 2 hours. The crystal structure of the -NaYF4: Yb3+ Er3+ hexagonal sub-microplates before and after annealing treatment is hexagonal phase. Under the excitation of 980 nm diode laser the upconversion luminescence intensity the sample after annealing is much stronger than that of the sample without annealing treatment. High temperature annealing process improved the crystallization of the sample resulting in the decrease of the nonradiative relaxation and the enhancement of the upconversion luminescence. (2012) Trans Tech Publications Switzerland.
	Energy transition between Yb3+-Tm3+-Gd3+ in Gd3+, Yb3+ and Tm3+ Co-doped fluoride nanocrystals (EI CONFERENCE) 会议论文 OAI收割 17th International Conference on Dynamical Processes in Excited States of Solids, DPC'10, June 20, 2010 - June 25, 2010, Argonne, IL, United states 作者: Zhang J.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：23/0 \| 提交时间：2013/03/25 YF3: 20%Gd3+ 20%Yb3+ 0.5%Tm3+ nanocrystal has been synthesized by a hydrothermal method. The upconversion (UC) emission and energy transfer progresses between Gd3+-Yb 3+-Tm3+ under a 980-nm continuous wave semiconductor laser diode excitation have been explored. The experimental results show that the violet and ultraviolet (UV) enhancement with Tm3+ upconversion emission occurs in the nanocrystal and in the same time the UC emissions of Gd3+ from 6D9/2 6IJ 6P5/2 and 6P7/2 states to the ground state 8S7/2 are obtained too. The dynamic analysis implies that under 980-nm excitation the nanocrystal dimension plays a key role in the efficient energy transfer processes between Gd3+-Yb 3+-Tm3tt based on the energy matching conditions. 2011 Published by Elsevier B.V.
	High gain avalanche photodiode (APD) arrays in flow cytometer opitical system (EI CONFERENCE) 会议论文 OAI收割 2nd International Conference on Multimedia Technology, ICMT 2011, July 26, 2011 - July 28, 2011, Hangzhou, China 作者: Chen Y.; Tang Y.; Wang C.; Zhao S. 收藏 \| 浏览/下载：45/0 \| 提交时间：2013/03/25 The basic principles of flow cytometer are introduced on the basis of diode pump solid state laser (532 nm) as a excitation source and a high gain avalanche photodiode (APD) arrays as a light detector a verification opitical system is built. Then Spherotech Rainbow Calibration Particle RCP-30-5A is used to evaluate the performance of the opitical system the fluorescence PE signal histogram of RCP-30-5A microshphere shows that the number of individual peaks is close to eight which is close to the world advanced level. 2011 IEEE.
	Lanthanide doped Y6O5F8/YF3 microcrystals: phase-tunable synthesis and bright white upconversion photoluminescence properties 期刊论文 OAI收割 dalton transactions, 2010, 卷号: 39, 期号: 38, 页码: 9153-9158 Wang S; Deng RP; Guo HL; Song SY; Cao F; Li XY; Su SQ; Zhang HJ 收藏 \| 浏览/下载：25/0 \| 提交时间：2012/04/25 DIODE-LASER EXCITATION HYDROTHERMAL SYNTHESIS 3-DIMENSIONAL DISPLAY TELLURITE GLASSES NITRIDE NANOTUBES Y2O3 NANOCRYSTALS ROOM-TEMPERATURE OXIDE NANOTUBES ENERGY-TRANSFER LUMINESCENCE
	Enhanced broadband near-infrared luminescence and optical amplification in Yb-Bi codoped phosphate glasses 期刊论文 OAI收割 appl. phys. lett., 2008, 卷号: 92, 期号: 10, 页码: 101121 阮健; Wu E.; 曾和平; 周时凤; Lakshminarayana G.; 邱建荣收藏 \| 浏览/下载：1024/230 \| 提交时间：2009/09/24 Laser diode excitation Phosphate glass
	Spectroscopic properties of fluorophosphate glass with high Er(3+)supercript stop concentration 期刊论文 OAI收割 appl. phys. b-lasers opt., 2007, 卷号: 86, 期号: 1, 页码: 83, 89 廖梅松; 胡丽丽; 段忠超; 张丽艳; 温磊. 收藏 \| 浏览/下载：1874/315 \| 提交时间：2009/09/24 Fluorophosphate glass Water content Laser diode excitation Metaphosphate content
	Energy upconversion in erbium doped oxyfluoride tellurite 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.; Xie Y.; Wang X.; Wang X.; Wang X. 收藏 \| 浏览/下载：16/0 \| 提交时间：2013/03/25 In this article we have investigated energy upconversion process in erbium doped oxyfuoride tellurite glasses exciated with 980 nm diode laser. The glasses used in measurements are with a mol% composition of 70TeO2-9PbF2-190AlF3-10BaF2-1Er2O3. The s intensity parameters the radiative rates the branching ratios and the fluorescence lifetimes were calculated based upon the Judd-Ofelt theory and the experimental absorption spectrum. Under 980 nm excitation efficient 530 544 and 665 nm upconversion emission are due to two-photon absorption processes.
	Energy transfer processes on both Er+ ion concentration and excitation densities in Yb3+-Er3+ codoped LaF3 matrix (EI CONFERENCE) 会议论文 OAI收割作者: Zhang J.; Wang Y.; Wang Y.; Wang Y.; Zhang J. 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/25 The effects of both Er3+ ion concentration and excited density upon frequency upconversion fluorescence emissions in Er3+/Yb 3+-codoped LaF3 powder are investigated. The results reveal that a higher Er3+ concentration can induce not only upconversion emission enhancements but also the changes among the relative intensities of the 407 519 539 and 651 nm radiation transitions as the samples are excited within the ranges of 20 to 700 mW with 978 nm laser diode (LD) as an excitation source. The changes are described by a schematic level model with the cross-relaxation processes between Er3+ ions and a series of dynamic equations that take into account the population of temperature dependent in Er3+. 2006 Elsevier B.V. All rights reserved.
	Upconversion luminescence properties of Y2O3:Yb 3+, Er3+ nanostructures (EI CONFERENCE) 会议论文 OAI收割作者: Cui Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 Cubic Y2O3 nanostructures doped with Yb3+ and Er3+ ions were synthesized by a facile hydrothermal method. Three distinct shapes such as nanotubes nanospheres and nanoflakes formed in the products by adjusting the pH value of reacting solution. Powder X-ray diffraction analyses indicate that all the three nanostructures are pure cubic phase while electron microscopy measurements confirm the formation of different morphologies. These nanostructures exhibit strong visible upconversion luminescence under the excitation of a 978-nm diode laser. In Yb3+- and Er3+- codoped Y2O3 nanocrystals the relative intensity of green emission became stronger as the size and morphology of sample changed from tubes to flakes. 2006 Elsevier B.V. All rights reserved.