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	1. Integrated microfibre-microchip devices for highly sensitive evanescent field absorbance detection
	ZHANG Lei,WANG Pan,YU Huangkang,TONG Limin
	Physics 19 May 2012
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	Abstract:A microfibre-microchip device for evanescent field absorbance detection is reported. A microfibre was embedded into a three dimensional glass-poly(dimethylsiloxane)(PDMS) microchip, with uniform waist diameter of 800 nm cross a 1-mm-wide detection cell. The sensitivity of the device was investigated by measuring the absorbance of Methylene Blue dye at 633-nm wavelength, achieving a detection limit of 0.45 μM with linear response up to 20 μM. To prove the suitability of the device for mixing, reaction and real time detection, phosphate was determined using Phosphorus-Molybdium-blue photometric method, achieving a detection limit of 0.034 μg/ml.
	TO cite this article:ZHANG Lei,WANG Pan,YU Huangkang, et al. Integrated microfibre-microchip devices for highly sensitive evanescent field absorbance detection[OL].[19 May 2012] http://en.paper.edu.cn/en_releasepaper/content/4479140


	2. Transmission-grating-photomasked transient spin grating and its application to measurement of electron-spin ambipolar diffusion in (110) GaAs quantum wells
	Ke Chen,Wenfang Wang,Jingda Wu,D Schuh,W. Wegscheider,T.Korn,Tianshu Lai
	Physics 22 March 2012
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	Abstract:A circular dichromatic transient absorption difference spectroscopy of transmission-grating-photomasked transient spin grating is developed and formularized. It is very simple in experimental setup and operation, and has high detection sensitivity. It is applied to measure spin diffusion dynamics and excited electron density dependence of spin ambipolar diffusion coefficient in (110) GaAs quantum wells. It is found that the spin ambipolar diffusion coefficient of (110) and (001) GaAs quantum wells is close to each other, but has an opposite dependence tendency on excited electron density. This spectroscopy is expected to have extensive applicability in the measurement of spin transport.
	TO cite this article:Ke Chen,Wenfang Wang,Jingda Wu, et al. Transmission-grating-photomasked transient spin grating and its application to measurement of electron-spin ambipolar diffusion in (110) GaAs quantum wells[OL].[22 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4472760

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	3. Phase-controlled light switching in a microwave-driven closed-loop atomic medium
	LI Jiahua,YU Rong,SI Liugang,ZHENG Anshou,YANG Xiaoxue
	Physics 19 March 2012
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	Abstract:We study the switching behavior in a three-level closed-loopatomic system driven coherently by a weak probe laser field, acontrol laser field and a microwave field. To describe thetransient behavior of the system, we go beyond the steady-stateapproximation and simultaneously solve the coupled Bloch-Maxwellequations for the atoms and the probe field on numerical grids asfunctions of space and time. The results show that thecontinuous-wave input probe field can be switched on and off whenthe relative phase of the applied field is periodically modulated.The proposed scheme may hold potential applications in the designof optical switching and optical storage devices.
	TO cite this article:LI Jiahua,YU Rong,SI Liugang, et al. Phase-controlled light switching in a microwave-driven closed-loop atomic medium[OL].[19 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4472304


	4. Current experimental constraints on the lightest Higgs boson massin the constrained MSSM
	CAO Jun-Jie,HENG Zhao-Xia,LI Dong-Wei,YANG Jin-Min
	Physics 19 March 2012
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	Abstract:In this work , the parameter space of the constrained MSSM is examined byconsidering various experimental constraints.For the dark matter sector, the neutralino dark matter is requiredto account for the relic density measured by the WMAP and satisfythe XENON limits on its scattering rate with the nucleon.For the collider constraints, all relevant direct andindirect limits has been considered,such as from LEP, Tevatron and LHC as well as the muonanomalous magnetic moment. Especially, for the limits from Bs→u+u-, its branching ratio is either directly consideredwith the latest LHC data or alternatively considered the double ratioof the purely leptonic decays defined by Br(Bs→u+u-)/Br(Bu→rvr)/ Br(Ds→rvr)/Br(D →rur)。Under these constraints,the lightest Higgs boson (h) in the CMSSM and NUHM2 is upper bounded by 124 GeV.For these models the di-photon Higgs signal at the LHC issuppressed relative to the SM prediction, and that the lower bound ofthe top-squark mass goes up with mh, reaching 600GeV for mh=124 GeV.
	TO cite this article:CAO Jun-Jie,HENG Zhao-Xia,LI Dong-Wei, et al. Current experimental constraints on the lightest Higgs boson massin the constrained MSSM[OL].[19 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4472236


	5. A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM
	CAO Jun-Jie,HENG Zhao-Xia,YANG Jin-Min,ZHANG Yan-ming,Zhu Jing-ya
	Physics 19 March 2012
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	Abstract:Motivated by the recent LHC hints of a Higgs boson around 125 GeV,a SM-like Higgs with the mass 123-127 GeV is assumed and itsimplication in low energy SUSY is studied by comparing the MSSM and NMSSM.This work considers various experimental constraints at 2σ level(including the muon g-2 and the dark matter relic density) andperforms a comprehensive scan over the parameter space of each model.Then in the parameter space which is allowed by current experimental constraintsand also predicts a SM-like Higgs in 123-127 GeV, the propertiesof the sensitive parameters (like the top squark mass and the trilinearcoupling At) are examined and the rates of the di-photon signal andthe VV(V=W,Z) signals at the LHC are calculated. The typical findings are: (i) In the MSSMthe top squark and At must be large and thus incur some fine-tuning,which can be much ameliorated in the NMSSM; (ii) In the MSSM a light stauis needed to make the di-photon rate of the SM-like Higgs exceed its SMprediction, while in the NMSSM the di-photon rate can be readily enhancedin several ways;(iii) In the MSSM the signal rates of pp→h→VV at the LHC are always suppressedcompared with their SM predictions, while in the NMSSM they may get enhanced;(iv) A large part of the parameter space so far survived will be soon covered by the expectedXENON100(2012) sensitivity (especially for the NMSSM).
	TO cite this article:CAO Jun-Jie,HENG Zhao-Xia,YANG Jin-Min, et al. A SM-like Higgs near 125 GeV in low energy SUSY: a comparative study for MSSM and NMSSM[OL].[19 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4472233


	6. Separation of spin angular momenta in focal region mediated through phase vortex
	CHEN Hao,HAO Jingjing,DING Jianping
	Physics 09 March 2012
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	Abstract:The spatial trajectory of the light beams is affected by their spin angular momentum (SAM) via spin-orbit interaction. We show that the separation of spin angular momentum flux in the focal region can occur at the focal plane illuminated by a space-variant linearly polarized beam with phase vortex. Such a beam carrying only the orbital angular momentum (OAM) but no SAM can develop a net SAM flux upon focusing. The radial split of the SAM flux density is mediated by the phase vortex (or OAM) and can be controlled by the topological charge of the phase vortex. The numerical simulation and the optical trapping experiment have been performed to validate the separation of the SAM flux density.
	TO cite this article:CHEN Hao,HAO Jingjing,DING Jianping. Separation of spin angular momenta in focal region mediated through phase vortex[OL].[ 9 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4470897


	7. Influences of electrode arrangements on flexural vibrations of piezoelectric ceramic tubes
	Zhang Hui,Zhang Shuyi,Fan Li
	Physics 05 March 2012
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	Abstract:Flexural vibration characteristics of piezoelectric ceramic tubes in acoustic actuators are studied by an electro-mechanical coupling Timoshenko beam model. In the model, the piezoelectric effects are considered, and effects of the different electrode arrangements on Young's modulus are investigated. Additionally, the particular attentions are devoted to effects of the mass loads on flexural resonance frequencies of the piezoelectric ceramic tubes. The predicted resonance frequencies of the ceramic tubes are sensitive to the mechanical parameters of the tubes. The bipolar and unipolar electrode arrangements have little effects on the flexural vibrations of piezoelectric ceramic tubes in acoustic actuatorsn.
	TO cite this article:Zhang Hui,Zhang Shuyi,Fan Li. Influences of electrode arrangements on flexural vibrations of piezoelectric ceramic tubes[OL].[ 5 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4468267


	8. Is Zb(10610) a Molecular State
	KE Hong-Wei, LI Xue-Qian, SHI Yan-Liang, WANG Guo-Li, YUAN Xu-Hao
	Physics 22 February 2012
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	Abstract:Whether molecular states indeed exist in nature has beendisputed for a long time. Several new resonances have been observedin the recent experiments and they seem to be of exotic structuresand some of them have been proposed to be molecular states. The veryrecent observation of Zb(10610)[(10608.4pm±2.0) MeV] and Zb(10650)[(10653.2pm ±1.5) MeV] encourages the interpretation ofmulti-quark states. In the Beter-Salpeter (BS) approach, we studythe possibility if two heavy mesons can form a molecular state byexchanging light mesons. Our results indicate that two heavy mesonscan form an isospin singlet (I=0) bound state but cannot form anisospin triplet (I=1) when the contribution of σ- exchangeis reasonably small, i.e. as the coupling of σ with mesons gσ takes the value given in previous literatures. Thus weconclude that the newly observed Zb(10610) should not be amolecular state, but a tetraquark state instead, at most, thefraction of the molecular state in the physical resonance Zb(10610) is tiny.
	TO cite this article:KE Hong-Wei, LI Xue-Qian, SHI Yan-Liang, et al. Is Zb(10610) a Molecular State[J].


	9. The study of domain reversal in the near-stoichiometric ZrO2-doped lithium niobate crystals
	Liang Qirui,Zhang Rong,Zhu Meiling,Liu Hongde
	Physics 29 January 2012
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	Abstract:Domain reversal of near-stoichiometric ZrO2-doped lithium niobate crystals was investigated. In the experiment, we observed the quadrangle domains with smaller size. The merging process of the neighboring domain walls stayed still for several minutes in the low electric field. The switching electric field for the backward domain reversal changed with the change of the forward electric field. However, these differences were diminished with the decreasing concentration of zirconium ions. The coercive field for the forward domain reversal is 900 V/mm in 0.5mol% ZrO2 doped near-stoichiometric lithium niobate crystals. With the low coercive field, near stoichiometric ZrO2-doped lithium niobate crystals would be a promising material for periodically poled lithium niobate with larger size.
	TO cite this article:Liang Qirui,Zhang Rong,Zhu Meiling, et al. The study of domain reversal in the near-stoichiometric ZrO2-doped lithium niobate crystals[OL].[29 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4464168


	10. Electric fatigue in metal/ferroelectric polymer/SiO2/p-Si capacitors
	Zhang Jihao,Zhu Guodong
	Physics 18 January 2012
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	Abstract:In recent years ferroelectric polymer-based nonvolatile memory devices have attracted much attention due to their flexibility, transparency and ease of production. However, their electrical stability is seldom studied. Here we report the observation of electric fatigue in metal/ferroelectric polymer/SiO2/p-Si capacitor memories, which is compared with the electric fatigue obtained from metal/ferroelectric polymer/p-Si capacitors. Our experiments indicate that the existence of SiO2 layer has greatly improved the fatigue endurance in metal/ferroelectric polymer/SiO2/p-Si capacitors. We also discuss the possible mechanism causing this improved fatigue endurance.
	TO cite this article:Zhang Jihao,Zhu Guodong. Electric fatigue in metal/ferroelectric polymer/SiO2/p-Si capacitors[OL].[18 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4462915

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