中国科技论文在线

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2009年12月21日

【期刊论文】Femtosecond laser-induced ZnSe nanowires on the surface of a ZnSe wafer in water

贾天卿， Tianqing Jiaa， b， *， Motoyoshi Babaa， Min Huangb， Fuli Zhaob， Jianrong Qiuc， Xiaojun Wub， Masaki Ichiharaa， Masayuki Suzukia， Ruxin Lic， Zhizhan Xuc， Hiroto Kurodaa

Solid State Communications 141 (2007) 635-638，-0001，（）：

-1年11月30日

摘要

We present a simple route for ZnSe nanowire growth in the ablation crater on a ZnSe crystal surface. The crystal wafer, which was horizontally dipped in pure water, was irradiated by femtosecond laser pulses. No furnace, vacuum chamber or any metal catalyst were used in this experiment. The size of the nanowires is about 1-3μm long and 50-150nm in diameter. The growth rate is 1-3μm/s, which is much higher than that achieved with molecular-beam epitaxy and chemical vapor deposition methods. Our discovery reveals a rapid and simple way to grow nanowires on designed micro-patterns, which may have potential applications in microscopic optoelectronics.

A.， Nanowire growth， B.， Laser ablation， C.， Crystal structure

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2009年12月21日

【期刊论文】Fabrication of two-dimensional periodic nanostructures by two-beam interference of femtosecond pulses

贾天卿， Tianqing Jia， *， Motoyoshi Baba， Masayuki Suzuki， Rashid A. Ganeev， Hiroto， Kuroda， Jianrong Qiu， Xinshun Wang， Ruxin Li， and Zhizhan Xu

，-0001，（）：

-1年11月30日

摘要

Two-dimensional periodic nanostructures on ZnO crystal surface were fabricated by two-beam interference of 790 nm femtosecond laser. The long period is, as usually reported, determined by the interference pattern of two laser beams. Surprisingly, there is another short periodic nanostructures with periods of 220-270nm embedding in the long periodic structures. We studied the periods, orientation, and the evolution of the short periodic nanostructures, and found them analogous to the self-organized nanostructures induced by single fs laser beam.

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2009年12月21日

【期刊论文】Dynamics of femtosecond laser pulse induced damage in multilayers

贾天卿， Haiyi Sun a， *， Tianqing Jia a， Zhongchao Wei b， Jianrong Qiu a， c， Xiaoxi Li a， Chengbin Li a， Shizhen Xu a， Donghai Feng a， Hezhou Wang b， Zhizhan Xu a

Optical Materials 28 (2006) 1372-1376，-0001，（）：

-1年11月30日

摘要

We report the single-shot damage thresholds of MgF2/ZnS omnidirectional reflector for laser pulse durations from 50 fs to 900 fs. A coupled dynamic model is applied to study the damage mechanisms, in which we consider not only the electronic excitation of the material, but also the influence of this excitation-induced changes in the complex refractive index of material on the laser pulse itself. The results indicate that this feedback effect plays a very important role during the damage of material. Based on this model, we calculate the threshold fluences and the time-resolved excitation process of the multiplayer. The theoretical calculations agree well with our experimental results.

MgF2/， ZnS omnidirectional reflector， Damage threshold， Damage mechanism， Localized dynamics

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2009年12月21日

【期刊论文】Catalytic synthesis and photoluminescence of needle-shaped 3C-SiC nanowires

贾天卿， D.H. Fenga， *， T.Q. Jiaa， X.X. Lia， Z.Z. Xua， J. Chenb， S.Z. Dengb， Z.S. Wub， N.S. Xub

Solid State Communications 128(2003)295-297，-0001，（）：

-1年11月30日

摘要

Needle-shaped 3C-SiC nanowires were grown from commercially available SiC powders in a thermal evaporation process with iron as catalyst. A strong broad photoluminescence peak located around 450 nm was observed at room temperature, which may be ascribed to quantum size effects of nanomaterials. Needle-shaped 3C-SiC nanowires may have great potential applications such as blue-green light-emitting diodes and display devices.

A.， Nanostructures， A.， Semiconductors， D.， Optical properties

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2009年12月21日

【期刊论文】Alignment of nanoparticles formed on the surface of 6H-SiC crystals irradiated by two collinear femtosecond laser beams

贾天卿， T.Q. Jiaa， F.L. Zhao， M. Huang， and H.X. Chen， J.R. Qiu， R.X. Li， and Z.Z. Xu， H. Kuroda

，-0001，（）：

-1年11月30日

摘要

Nanoripples with periods of 150 and 80 nm are formed on the surface of 6H-SiC crystals irradiated by the p-polarized 800 nm and the s-polarized 400 nm femtosecond lasers, respectively. When both of the two collinear laser beams focus simultaneously on the sample surface, nanoparticles are formed on the whole ablation area, and they array in parallel lines. We propose and confirm that the second harmonics in the sample surface excited by the incident lasers plays an important role in the formation of nanostructures.

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