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	1. Optical forces in slot plasmonic waveguides
	Kang Zhao,Shu Yang
	Physics 14 November 2017
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	Abstract:We propose two kinds of pair-structure plasmonic waveguides. Their gap mode properties are studied. It is found that very small mode areas can be obtained. Moreover, we calculate the optical forces that acting on the nanoparticle which is placed in the gap region of pair-structure waveguides. It is found that owing to the strong coupling between the pair structures, a strong local force(as much as more than 4000fN/W) can be generated, which is much stronger than those in most literatures. And the strength and range of the force can be adjusted by the parameters. With these features the pair-structure plasmonic waveguides may be applied as strong and tunable optical tweezers.
	TO cite this article:Kang Zhao,Shu Yang. Optical forces in slot plasmonic waveguides[OL].[14 November 2017] http://en.paper.edu.cn/en_releasepaper/content/4742056


	2. The Research of the Properties of Atomic Absorption Photon and Stimulated Radiation by Using Huygens' Principle
	ZHAO Zhenming,LI Jialin
	Physics 28 August 2017
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	Abstract:We used Huygens' principle to study the interaction between light and atom, and revealed the microcosmic process of the attenuation and gain of a plane wave. We began with the shadow of a leaf, expanding to the atomic absorption plane wave, and obtained the expression of the atomic absorption photon by using Huygens' principle. The method of negative absorption is used to analysis the optical gain process, and we obtained the properties of the stimulated radiation photon, according to the fact that the optical gain is atomic collective contribution of the stimulated radiation, showing that the atomic stimulated radiation is not photons cloning.
	TO cite this article:ZHAO Zhenming,LI Jialin. The Research of the Properties of Atomic Absorption Photon and Stimulated Radiation by Using Huygens' Principle[J].

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	3. Photonic-assisted Microwave Switch at Speed of <100 Picosecond
	Feng Xia,Yan Lianshan,Jiang Hengyun,Pan Yan,Jiang Lin,Luo Bin,Pan Wei
	Physics 22 May 2017
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	Abstract:A photonic approach to rapidly switch two microwave signals with different frequency or/and phase is proposed. We experimentally show that two microwave signals with a precise π phase difference at 21- and 29.425-GHz are successfully switched at the speed of 93.4-, 83.3-ps respectively.
	TO cite this article:Feng Xia,Yan Lianshan,Jiang Hengyun, et al. Photonic-assisted Microwave Switch at Speed of <100 Picosecond[OL].[22 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4735558


	4. Near-infrared quantum cutting in Pr3+/Yb3+ codoped oxyfluoride aluminosilicate glasses
	ZHOU Aihua,Song Feng,JU Danan,YANG Yingchun
	Physics 12 May 2017
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	Abstract:Near-infrared quantum cutting phenomenon has been demonstrated in Pr3+/Yb3+ co-doped oxyfluoride aluminosilicate glasses synthesized by a conventional melting-quenching method. The absorption spectra, emission spectra in visible and infrared regions and luminescence decay time have been investigated. Under 442 nm excitation, the visible and the near-infrared emission spectra reveal that the energy transfer occur from Pr3+ to Yb3+ ions, resulting in intense 980 nm near-IR emission and the first-order energy transfer is responsible for the downconverted luminescence. The efficiency of energy transfer from Pr3+ to Yb3+ is 60%, and the optimal quantum efficiency is 160%. In addition, the emission assigned to Yb3+:2F5/2→2F7/2 transition matches well with the band gap of single-junction, which have potential application in enhancing the conversion efficiency of crystalline Si solar cell.
	TO cite this article:ZHOU Aihua,Song Feng,JU Danan, et al. Near-infrared quantum cutting in Pr3+/Yb3+ codoped oxyfluoride aluminosilicate glasses[OL].[12 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4734435


	5. Optical Encryption of Gray Image Based on the Computer Generated Hologram and 2D Sine Logistic Map Modulation
	Ren Hui,Wang Qionghua,Wang Jun,Li Xiaowei
	Physics 09 May 2017
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	Abstract:In this paper, we introduce a novel optical encryption and decryption method of the gray image based on the computer-generated hologram (CGH) and two-dimensional (2D) Sine Logistic Modulation Maps (SLMM). The 2D SLMM is highly sensitive to its parameters and initial values and owns larger security space than existing chaotic maps. Since using chaotic maps or the CGH alone achieves low security, we combine both of them together. In the encryption process, the hologram is gotten by Fresnel diffraction, and is logically modulated with 2D-SLMM. This logical modulation we proposed can avoid the complex algorithm. The decryption process is an inverse of encryption. Simulation results and the security analysis verified that the new approach outperforms the other conventional methods. It has higher security level, as a result of the advantages of 2D-SLMM, and resistances to various attacks.
	TO cite this article:Ren Hui,Wang Qionghua,Wang Jun, et al. Optical Encryption of Gray Image Based on the Computer Generated Hologram and 2D Sine Logistic Map Modulation[OL].[ 9 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4733893


	6. Phase noise influence in dual-frequency laser phase-shift range finder
	Hongzhi Yang,Changming Zhao,Haiyang Zhang,Suhui Yang
	Physics 03 May 2017
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	Abstract:The influence of phase noise in dual-frequency laser phase-shift range finder is theoretical and experimentally investigated. The proposed range finder is based on the use of a coherent dual-frequency laser and a direct detection of the backscattered laser. The effects of laser phase noise and noise from an acousto-optic frequency shifter (AOFS) on dual-frequency laser phase-shift range finder is analyzed. The expression of power spectral density and the phase noise of dual-frequency laser beat note are deduced. And we find that noise from the acousto-optic frequency shifter exhibit much greater impact into beat note noise conversion. The theoretical results can be used to estimate the influence of laser phase noise, noise induced by the acousto-optic frequency shifter and delay length in dual-frequency laser range finder. The experiment of dual-frequency laser range finder is performed on outdoor targets at the distance of 200m. The phase jitter in the experiment is in good agreement with the model of beat note phase noise.
	TO cite this article:Hongzhi Yang,Changming Zhao,Haiyang Zhang, et al. Phase noise influence in dual-frequency laser phase-shift range finder[OL].[ 3 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4730206


	7. Control of Optical Limiting Property of Graphene Dispersions by Tuning Solvent Temperature
	Lihe Yan,Huanhuan Xu
	Physics 28 April 2017
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	Abstract:The optical limiting (OL) properties of graphene dispersions in chlorobenzene (CB) and N-methy1-2-pyrrolidinone (NMP) were studied using a nanosecond laser. By measuring the nonlinear scattering (NLS) light, we demonstrated that NLS effect originating from laser induced solvent micro-bubbles and/or micro-plasmas played an important role in OL process of graphene dispersions. By changing the solvent temperature, the OL ability of graphene dispersion was able to be controlled. The influence of temperature on the OL property of the materials was attributed to the surface tension change of solvents, which was responsible to the NLS in the OL process of the dispersions.
	TO cite this article:Lihe Yan,Huanhuan Xu. Control of Optical Limiting Property of Graphene Dispersions by Tuning Solvent Temperature[OL].[28 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4730674


	8. Population dynamics in graphene under femtosecond chirped pulse excitation
	DING Chunling,YU Rong,LI Ruoping,ZHANG Duo
	Physics 21 April 2017
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	Abstract:We present, within a femtosecond time scale, a scheme for studying the fast population dynamics of graphene under a few-cycle chirped pulse excitation. Based on the density-matrix formalism, the time-dependent differential equations are derived which can be used to describe the carrier dynamics in graphene. We find that the ultrafast transfer of population between electronic states in both valence and conduction bands becomes possible due to the combined interband and intraband transitions. Also, a complete population inversion can be obtained under appropriate conditions. These dynamical behaviors can be controlled by choosing suitable values of chirped parameter as well as the intensities of laser pulse and the applied magnetic field. Our investigations have potential applications in the design of graphene-based ultrafast electronic and optoelectronic devices.
	TO cite this article:DING Chunling,YU Rong,LI Ruoping, et al. Population dynamics in graphene under femtosecond chirped pulse excitation[OL].[21 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4726361


	9. Coherent diffraction microscopy for nano-imaging of cells
	Guanxiao Cheng
	Physics 19 April 2017
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	Abstract:To image living cells, lower resolution of three-dimensional reconstructions caused by x-ray lenses and radiation damage should be considered. As a type of developing computational microscopy, coherent diffraction imaging (CDI) is demonstrating its ability to imaging cells at superior resolution without any lens. In this paper, some challenges and corresponding approaches to CDI were briefly analyzed and discussed. Here equally sloped tomography is applied and demonstrates that it can achieve superior three-dimensional reconstructions to conventional tomography from fewer projections.
	TO cite this article:Guanxiao Cheng. Coherent diffraction microscopy for nano-imaging of cells[OL].[19 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725667


	10. Analysis of a vortex beam in a non-coaxial optical focusing system
	Guoxuan Zhu,Yujie Chen,Yanfeng Zhang,Siyuan Yu
	Physics 18 April 2017
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	Abstract:In this paper, we analyze an optical beam carrying orbital angular momentum (OAM), i.e. a vortex beam, under the situation where a vortex phase plate (VPP) and a lens are used to generate and focus the vortex beam. A symmetric beam can be expanded into Fourier series in the azimuth frequency (l) space. We use this as a tool to analyze the non-coaxial system. The system efficiency, limited by the transmitting of ring-core fiber, against off-set distance is calculated. With such guidance, we successfully couple the vortex beam into a 1-km-long ring-core fiber.
	TO cite this article:Guoxuan Zhu,Yujie Chen,Yanfeng Zhang, et al. Analysis of a vortex beam in a non-coaxial optical focusing system[OL].[18 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4725426

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