Lixue Chen
Harbin Institute of Technology
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Publication
Featured researches published by Lixue Chen.
Optics Communications | 2003
Lixue Chen; Dalwoo Kim
Bistable switching behavior in a two-dimensional nonlinear photonic crystal with a Kerr point defect is researched by numerical simulation of finite-difference time-domain method. Optical bistable switching by whole localized defect-mode is observed in the component.
Optics Communications | 2000
Yinglin Song; Chi Zhang; Yuxiao Wang; Guangyu Fang; Guosheng Jin; Xueru Zhang; Shutian Liu; Lixue Chen; Xin-Quan Xin
Abstract Nonlinear absorption and refraction of novel cubane-like shaped metal clusters WOS 3 Cu 3 I(2-Mepy) 3 (I) and MoOS 3 Cu 3 I(2-Mepy) 3 (II) in DMF solution are studied by using Z -scan measurement technique with laser pulses of 10 ns pulse-width at the wavelength of 532 nm. The compound (I) possesses a self-focusing property, while compound (II) exhibits a self-defocusing property. The refractive nonlinearity of the cluster can be attributed to the excited-state nonlinear refraction effect. A theoretical model of the excited-state refraction is presented to analyze the experimental results. The theoretical results are in good agreement with the experimental data. The condition of the sign change of nonlinear refraction is also studied.
Optical Materials | 2000
Yinglin Song; Chi Zhang; Yuxiao Wang; Guangyu Fang; Guocheng Jin; Shutian Liu; Lixue Chen; Xin-Quan Xin
Abstract Optical limiting (OL) properties of a new pentanuclear cluster [MoS4Cu4Br2(py)6] were studied by using ns laser pulses. The comparison of the OL performance of this compound [MoS4Cu4Br2(py)6] with that of C60 fullerene shows that the cluster is superior to the C60 fullerene. Pump–probe results show that the OL behavior of the cluster can be attributed to the excited-state absorption.
Materials Letters | 2000
Yinglin Song; Chi Zhang; Yuxiao Wang; Guangyu Fang; Guochen Jin; Xueru Zhan; Shutian Liu; Lixue Chen; Xin-Quan Xin
Abstract The optical nonlinearity performance and optical limiting (OL) properties of the new pentanuclear clusters [WS 4 Cu 4 Br 2 (py) 6 ] [I] and [MoS 4 Cu 4 Br 2 (py) 6 ] [II] were studied by using nanosecond laser pulsed at 532 nm wavelength. The cluster (I) exhibits strong OL effects. It is the best among the same kind of clusters. The OL performance of compound [I] was demonstrated to be superior than that of compound [II], and that of the compound [II] was superior than the C 60 fullerene. The excited-state absorption has been studied by using Z-scan technique at the same time.
Optics Communications | 2006
Weiqiang Ding; Lixue Chen; Donghua Tang; Weihui Li; Shutian Liu
Photonic crystal (PC) coupled cavity waveguides (CCWs) with completely separated eigenfrequencies (or supermodes) are investigated. Using a coupled mode theory (CMT), the properties of the supermodes, such as the eigenfrequencies (including the central frequencies and corresponding linewidths), the quality factors (Qs) and the electric field profiles, are expressed in very simple formulas, and these results agree well with those derived from transfer matrix method (TMM). We discuss the great differences between the supermodes and continuous modes, which are described by tight binding (TB) theory. Then, the potential application of supermodes as a multi-channel (covering the whole C-band) bistable switching is investigated. Using the results of CMT, we predict that the thresholds of all the channels are uniform, and verify this prediction using nonlinear transfer matrix method.
Materials Letters | 2009
Yu-jie Feng; J.H. Sui; Lixue Chen; W. Cai
Optics Communications | 2005
Weiqiang Ding; Lixue Chen; Shutian Liu
Optics Communications | 2005
Weiqiang Ding; Lixue Chen; Shutian Liu
arXiv: Optics | 2005
Weiqiang Ding; Lixue Chen; Shutian Liu
Optics Communications | 2004
Weiqiang Ding; Lixue Chen; Shutian Liu