Guiqiu Wang

Dalian Maritime University

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Dajun Liu

Dalian Maritime University

Yaochuan Wang

Dalian Maritime University

Hongming Yin

Dalian Maritime University

Haiyang Zhong

Dalian Maritime University

Yan Yin

Dalian Maritime University

You‐Nian Wang

Dalian University of Technology

Yihua Jiang

East China University of Science and Technology

Jianli Hua

East China University of Science and Technology

Yizhuo Wang

Dalian Maritime University

He Yi

Wuhan University of Technology

Cooperative Institutions

Dalian Maritime University

Chinese Academy of Sciences

Dalian University of Technology

Dalian University

Dalian Institute of Chemical Physics

University of Chinese Academy of Sciences

Xi'an Jiaotong University

Tsinghua University

East China University of Science and Technology

Sichuan University

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SPREADING PROPERTIES OF A LORENTZ-GAUSS VORTEX BEAM PROPAGATING IN BIOLOGICAL TISSUES

Progress In Electromagnetics Research Letters (2019)

Dajun Liu Hongming Yin Guiqiu Wang Aiyi Dong Yaochuan Wang

10.2528/pierl19031801

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Citations (4)

Probing ultrafast excited state dynamics and nonlinear absorption properties of three star-shaped conjugated oligomers with 1,3,5-triazine core

RSC Advances (2014)

Yaochuan Wang Shuhui Yin Jianyong Liu Li Yao Guiqiu Wang

The effects of different bridging fluorene units on the two-photon absorption (TPA) properties and ultrafast response of organic conjugated oligomers were investigated for three star-shaped oligomers named TFT-1, TFT-2 and TFT-3. These three oligomers are composed of the same central core 1,3,5-triazine, with three arms that consist of specific numbers of bridging fluorene groups and with triphenylamine as electron-donating group at the terminal end of each arm. The studies on these oligomers were carried out by using two-photon excited fluorescence (TPF), degenerate pump–probe techniques, transient absorption spectroscopy and time-resolved photoluminescence (TRPL) methods. The TPA cross-sections were determined to be 1509 GM, 1260 GM and 789 GM for TFT-1, TFT-2 and TFT-3, respectively, decreasing with the increase of bridging fluorene number. Ultrafast dynamics results show that there is a fast intramolecular charge transfer (ICT) formation time of about several ps and a relatively long decay process of the ICT state. The formation time of ICT was found to increase from TFT-1 (1.9 ps), to TFT-2 (3.0 ps) and TFT-3 (6.3 ps), with the increased number of the fluorene bridge, which may explain the action of fluorene bridge on the electron transmission properties, the ICT properties and the TPA behavior.

Triphenylamine

Photon Upconversion

10.1039/c3ra45544k

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Citations (31)

Average intensity and coherence properties of a partially coherent Lorentz-Gauss beam propagating through oceanic turbulence

Optics & Laser Technology (2017)

Dajun Liu Guiqiu Wang Yaochuan Wang

10.1016/j.optlastec.2017.08.011

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Citations (28)

Generalized formulas for electromagnetic beams on inverse propagation through uniaxial crystals orthogonal to the optical axis

Optik (2012)

Dajun Liu He Wang Zhongxiang Zhou Yaochuan Wang Guiqiu Wang

Uniaxial crystal

10.1016/j.ijleo.2012.08.093

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Plasma Wake and Interaction force for Diatomic Molecular ion Transporting through plasmas

Advances in engineering research/Advances in Engineering Research (2016)

Guiqiu Wang Siyuan Liu Yaochuan Wang

The objective of the present work is to study the interactive potential and forces for a diatomic molecular ion in plasma within the dielectric response theory.The results show that the interactive force shows the asymmetric property due to the wake effects.In addition, the force can be divided into two parts, one is the coulomb force and the other is polarization force.Coulomb force is symmetric, while the polarization force made the main contribution to the asymmetric.

Diatomic molecule

Dielectric response

10.2991/icmmct-16.2016.369

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Propagation Properties of a Partially Coherent Flat-Topped Vortex Hollow Beam in Turbulent Atmosphere

Journal of the Optical Society of Korea (2016)

Dajun Liu Yaochuan Wang Guiqiu Wang Hongming Yin

Using coherence theory, the partially coherent flat-topped vortex hollow beam is introduced. The analytical equation for propagation of a partially coherent flat-topped vortex hollow beam in turbulent atmosphere is derived, using the extended Huygens-Fresnel diffraction integral formula. The influence of coherence length, beam order N, topological charge M, and structure constant of the turbulent atmosphere on the average intensity of this beam propagating in turbulent atmosphere are analyzed using numerical examples.

Coherence time

Atmospheric optics

10.3807/josk.2016.20.1.001

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Citations (11)

Design of 1200T Large Scale Rubber Injection Machines

Mechanical & Electrical Engineering Technology (2010)

Guiqiu Wang

This article introduces the technical solutions and measures of large scale rubber injection machines.It describes the whole system design process from the plasticizing injection system,mould clamping system,cold runner block system,control system etc.respectively.Through this technology,one step moulding or few steps? mounding of large rubber products can be achieved.

Injection moulding

Injection molding machine

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First-principles study of the cubic CaHfO₃(001) surface

International Journal of Modern Physics B (2016)

Kun Yang Yanqing He Yao Li Yi Cheng Guiqiu Wang

The geometric and electronic structures of the cubic CaHfO 3 (001) surfaces have been studied using first-principles density functional theory (DFT) calculations. Two different terminations, CaO- and HfO 2 -terminated surfaces, were investigated. It has been found that Ca atom has the largest relaxation for both kinds of terminations, and the surface rumpling of the CaO termination is far more prominent than that of the HfO 2 -terminated surface. Both the bandgaps of the CaO- and HfO 2 -terminated surfaces were calculated to be smaller than that of the CaHfO 3 bulk. It was also shown that the CaO-terminated surface has a lower energy than the HfO 2 -terminated surface.

10.1142/s021797921650168x

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Citations (6)

Propagation of a polychromatic stochastic electromagnetic multi-Gaussian Schell-model vortex beam in oceanic turbulence

Yaotian Yan Dajun Liu Guiqiu Wang Yaochuan Wang

The analytical equations of the polychromatic stochastic electromagnetic multi-Gaussian Schell-model vortex (EMGSMV) beam through oceanic turbulence are obtained in theory. The influences of source parameters and turbulence on changes in spectral shifts and polarization of a polychromatic EMGSMV beam are numerically analyzed. It is seen that the relative spectral shift of such beam with larger N , smaller l and smaller δ₀ will evolve from red shift to blue shift on propagation, and the polarization can become poor when a polychromatic EMGSMV beam propagates in stronger oceanic turbulence.

Gaussian beam

10.1117/12.2647165

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Nonlinear Optical Properties of Several π Conjugated Bridge Groups based on Diketo-Pyrrole-Pyrrole: Study on the Length and Symmetry of N-atom Position Substituted Alkyl Chains

Journal of Physics Conference Series (2023)

Hong Lin Bowen Zhou Xiangxu Meng Ding Zhang Yihua Jiang

Abstract In this paper, three modified π-conjugated bridges, were selected to study the relationship between substituted alkyl chains and two photon absorption ability as well as intramolecular charge transfer property. The modification is on the N-atom position of Diketo-Pyrrole-Pyrrole bridges. Some nonlinear optical measurements as well as several spectra methods, were used. DPP-J0, DPP-J1 and DPP-J2 exhibit cross-section of 5.6 GM, 8.1 GM, and 6.4 GM. The results exhibit obvious relation on the length and symmetry of N-atom position substituted alkyl chains. A pump-probe measurement was operated at 800 nm. Ultrafast dynamics results exhibit slight difference on the intramolecular charge transfer of these conjugated bridge derivatives. The quantum chemical calculations results are well accorded with the nonlinear optical properties. The results obtained may provide some useful information on molecular design and optimization of new advanced materials.

Pyrrole

10.1088/1742-6596/2470/1/012025

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