Isolated Attosecond Pulse Generation by Direct Optimization of Two-Color Laser Fields Using the Genetic Algorithm (特集 光・量子ビームによるナノダイナミクス)
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概要
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We propose a method to optimize two-color laser fields, composed of an intense driving pulse at 580 nm and a weaker control pulse at 1160 nm, for isolated attosecond pulse generation. We use genetic algorithm (GA) to optimize laser parameters including the group-delay dispersion and the third-order dispersion of the control pulse. The fitness function is constructed by directly using the duration of the generated high-harmonic extreme ultraviolet (XUV) pulse. Our simulation results show that the isolated attosecond pulse can be significantly shortened without much affecting its spectral width.
著者
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Yamashita Mikio
Department Of Applied Physics Hokkaido University
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Karasawa Naoki
Department Of Applied Photonics System Technology Chitose Institute Of Science And Technology
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Tanigawa Takashi
Department Of Cardiology Iwate Prefectural Central Hospital
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Fang Shaobo
Center For Free-electron Laser Science Desy
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ISHIKAWA Kenichi
Photon Science Center, Graduate School of Engineering, The University of Tokyo
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