Topical meeting 05
Topical meeting 05: Laser Science and Technology
(LST)

Chair

Yongfeng Lu University of Nebraska-Lincoln, USA

Co-chairs

Andreas Ostendorf Ruhr-Universität Bochum, Germany	Xiaoyan Zeng Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China	Wei Xiong Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China

Program Committee Members

Yongfeng Lu, University of Nebraska-Lincoln, USA

Andreas Ostendorf, Ruhr-Universität Bochum, Germany

Jean-Francois Silvain, Centre National de la Recherche Scientifique, France

Wei Xiong, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China

Xiaoyan Zeng, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China

Leimin Deng, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China

Jianrong Qiu, Zhejiang University, China

Minlin Zhong, Tsinghua University, China

Dong Wu, University of Science and Technology of China, China

Xiuquan Ma, Huazhong University of Science and Technology, China

Yang Gao, East China University of Science and Technology, China

Invited Speakers

	Yaoyu Cao, Jinan University, China Title: Laser nanofabrication based on optical super-resolution techniques and its applications Abstract: An emerging optical two-beam lithography technique inspired by optical super-resolution nanoscopy is demonstrated for realizing laser nanofabrication technique. A super-resolved 3D feature as small as sub 50 nm in deep sub-wavelength scale can be achieved.
	Feng Chen, Xi'an Jiaotong University, China Title: Bio-Inspired Designing of Surfaces with extreme wettability by a femtosecond laser Abstract: Femtosecond laser fabrication has been applied to control the surface extreme wettabilities of materials，which will have important guiding significance to researchers and engineers to well control water droplets, oil droplets and bubbles’ behaviors on a material surface.
	Yang Gao, East China University of Science and Technology, China Title: Mask-free formation of ultrahigh sensitive SiC-based strain sensor arrays on elastomer toward electronic skins Abstract: Mask-free formation of patterned active materials on elastomers without involving complicate processes is a grand challenge in developing E-skins. Here, a laser direct writing technique is developed to fabricate SiC-based strain sensor arrays for E-skins.
	Chunlei Guo, University of Rochester, USA Title: Surface functionalization with femtosecond lasers & applications Abstract: I will discuss some of our recent advancements and activities in femtosecond laser micro- and nano-processing of material surfaces, including the resulting surface structures, their formation dynamics, and the drastically altered surface functionalities.
	Peter R Herman, University of Toronto, Canada Title: Laser structured optical fibre – creating the lab-in-fibre Abstract: A variety of beam shaping, and nonlinear optical interactions were combined to favourably induce controlled shapes of refractive index change, nano-gratings, and micro-explosions and thereby structure photonic, opto-mechanical, and nanofluidic microsystems inside of optical fibre.
	Yongqing Li, East Carolina University, USA Title: Combination of optical trapping and Raman spectroscopy for the characterization of nano- and micro-sized particles in aqueous and air environment Abstract: Light-absorbing particles and smut biological cells suspended in air can be optically pulled over a meter-long distance using a single collimated laser beam based on negative photophoretic force and they are characterized with micro-Raman spectroscopy.
	Xueming Liu, Zhejiang University, China Title: Buildup dynamics of mode-locked lasers Abstract: We demonstrate the first observations of the entire buildup process of solitons and soliton molecules in mode-locked lasers, revealing their possible pathways. We report the real-time observation from Q-switching to mode-locking transition stage.
	Yongfeng Lu, University of Nebraska-Lincoln, USA Title: Laser-resonance metal organic chemical vapor deposition of gallium nitride Abstract: Due to its unique properties, gallium nitride is of great interest in industry applications and scientific research. The processes of conventional methods for gallium nitride deposition, which rely on thermal heating, are inefficient energy coupling routes to drive gas reactions. A high deposition temperature (800-1100 °C) is generally required to overcome the energy barriers to precursor adsorption and surface adatom migration. As an intensive, coherent and monochromatic light, laser is an ideal candidate for exploring alternative energy coupling pathways. The laser techniques offer processing advantages that are not available with conventional deposition methods.
	Xiuquan Ma, Huazhong University of Science and Technology, China Title: Thermal Effect Limitation and Further Power Scaling in High Power Fiber Lasers Abstract: Thermal effects such as modal-beating-induced thermal grating are the main limitations for further power scaling in high power fiber lasers. In this work, the optimization efforts leading to good further power scaling ability are shown.
	Xuesong Mei, Xi'an Jiaotong University, China Title: Femtosecond laser processing of hard brittle materials and its application Abstract: Five-axis processing equipment with ultra-fast laser is a promising development direction of advanced laser processing technology. 3D vision system on equipment well solved the manufacturing problems of complex structures and is an efficient way. This technology has been applied to solve major problem of key components on aero engine.
	Eric Mottay, Amplitude Systems, France Title: High Throughput Femtosecond Laser Processing Abstract: Laser processing at high average power raises specific challenges. Along high average power ultrafast lasers, new processing strategies are being investigated such as high-speed scanners, diffractive optics for parallel processing, or even new interaction mechanisms.
	Andreas Ostendorf, Ruhr-Universität Bochum, Germany Title: Two-photon polymerization in optical biochemical sensing Abstract: In this work application of the two-photon polymerization process for the fabrication of optical microcavity sensors and optimization of manufacturing conditions for the enhancement of their properties followed by the numerical simulations and experimental results are represented.
	Valentin Petrov, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy, Germany Title: Frequency down-conversion of 1 μm laser radiation to the mid-IR using non-oxide nonlinear crystals in cascaded intracavity configurations Abstract: An optical parametric oscillator (OPO) based on AgGaSe2 (AGSe) and difference-frequency generation (DFG) in AGSe and BaGa4Se7 are studied inside the cavity of an oxide-based OPO to generate widely-tunable mid-IR radiation in the 5.8-18-micron range.
	Wilhelm Pfleging, Karlsruhe Institute of Technology, Germany Title: Laser processing of energy storage materials for pushing lithium-ion battery performances beyond state-of-the-art Abstract: Laser technologies so far introduced in battery manufacturing have no impact on performances. In this work, laser structuring of electrode materials was studied for substantial improvement of lithium-ion battery lifetime, high-rate capability, and energy density.
	Jianrong Qiu, Zhejiang University, China Title: Single femtosecond laser beam induced periodic micro/nano structures and their applications Abstract: We will describe our novel observations about single femtosecond laser bean induced periodic micro/nano structures.
	Sascha Schäfer, The Carl von Ossietzky University of Oldenburg, Germany Title: Probing ultrafast nanoscale structural and magnetic dynamics with femtosecond electron pulses Abstract: Time-resolved transmission electron microscopy allows for the spatio-temporal mapping of ultrafast nanoscale dynamics. Here, we summarize our current developments in ultrafast electron imaging and provide examples on the imaging of ultrafast strain and spin dynamics.
	Jean-Francois Silvain, Centre National de la Recherche Scientifique, France Title: Growth and characterization of laser assisted combustion CVD diamond films Abstract: Polycrystalline diamond films have been grown through laser-assisted combustion synthesis and their thermal conductivity and thermal boundary resistance have been measured. The study enlightens the key influence of the deposition process on the thermal properties.
	Hongbo Sun, Tsinghua University, China Title: Femtosecond laser nanofabrication for functional devices Abstract: Because of its capabilities in constructing arbitrary three-dimensional structures with high resolution, femtosecond laser has been considered as an important tool in fabrication of functional devices from harsh-processing materials including sapphire and diamond. Here we will introduce our recent progress along this line, particular emphasis will be placed on how to increase the fabrication efficiency and improve the surface flatness.
	Vadim P. Veiko, ITMO University, Russia Title: Laser thermochemical writing of diffraction optical elements on metals with transparent oxides Abstract: Laser thermochemical writing (LTW) is able to provide a pattern resolution of diffraction optical elements higher than an optical one due to opto-thermo-chemo feedback. In the talk principals, results and perspectives of LTW will be considered.
	Zhiyi Wei, Institute of Physics, CAS, China Title: Long-term phase stabilization in sub-cycle waveform synthesis Abstract: Long-term phase stabilization routes to generate arbitrarily tailored sub-cycle optical-field waveforms, opening up unprecedented opportunities in attoscience and strong-field physics. Here, we introduce novel mono-cycle synthesized optical fields, performance sub-100-attosecond phase locking over 8 hours.
	Dong Wu, University of Science and Technology of China, China Title: High efficiency 3D Femtosecond laser microfabrication based on spatial light modulation Abstract: Laser microfabrication is a promising technique to realize 3D functional microdevices. In this work, we improve its efficiency by spatial light modulation, explore new mechanism between laser and various materials, and realize more advanced functions by proposing hybrid fabrication strategy.
	Minlin Zhong, Tsinghua University, China Title: Ultrafast laser micro-nano structured superhydrophobic-superhydrophilic network for efficient water collection Abstract: A novel superhydrophilic-superhydrophobic venation network, fabricated by ultrafast lasers, manifests a significant high efficiency in collecting and centralizing the condensed water by self-driven on entire covered surface, 6.4 times higher than the conventional superhydrophobic surfaces.