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Terahertz Magneto-Optical Absorption by Cylindrical Metallic Nanowires
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Terahertz Magneto-Optical Absorption by Cylindrical Metallic Nanowires
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Ministry of Science and Technology of China (National Key Scientific Instrument and Equipment Development Projects) (2011YQ130018); Department of Science and Technology of Yunnan Province; Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics (KF201303); Joint Research Fund for Sichuan University and CAEP; Chinese Academy of Sciences (YZ201223)

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    摘要:

    運(yùn)用Kubo公式對圓柱形金屬納米線的磁光響應(yīng)特性進(jìn)行了理論研究。結(jié)果發(fā)現(xiàn)：與具有拋物線型電子限制勢的低維半導(dǎo)體量子線不同，金屬納米線的磁光吸收譜以及相位延遲響應(yīng)都敏感地依賴于光的偏振，這主要是由于不同的偏振光具有不同的磁光選擇定則所致。另外，電子在不同子能帶間磁光躍遷所產(chǎn)生的光吸收在太赫茲頻率范圍，可以通過改變納米線半徑以及調(diào)節(jié)磁場強(qiáng)度來有效調(diào)節(jié)金屬納米線在太赫茲頻段的共振磁光吸收特性。這些理論結(jié)果揭示了金屬納米線的基本磁光響應(yīng)特性

    Abstract:

    We conducted a theoretical study on magneto-optical (MO) properties of cylindrical metallic nanowires. The MO conductivity was calculated using the Kubo formula. Results show that in contrast to parabolically confined quantum wires realized from low-dimensional semiconductor systems, the features of MO absorption and the retard effect of the MO response by cylindrical metallic nanowires depend sensitively on the polarization of the radiation field due to corresponding selection rules. The frequencies of resonant absorption induced by inter-subband MO transition channels are within the terahertz (THz) bandwidth and can be tuned effectively by adjusting the radius of the nanowire and/or varying the strength of the magnetic field. This study is pertinent to the potential application of metallic nanowires as frequency-tunable THz optoelectronic devices

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吳 平,徐 文,李龍龍,張 超. Terahertz Magneto-Optical Absorption by Cylindrical Metallic Nanowires[J].稀有金屬材料與工程,2015,44(12):3014~3018.[Wu Ping, Xu Wen, Li Longlong, Zhang Chao. Terahertz Magneto-Optical Absorption by Cylindrical Metallic Nanowires[J]. Rare Metal Materials and Engineering,2015,44(12):3014~3018.]
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  • 收稿日期:2015-04-15
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  • 在線發(fā)布日期: 2016-08-29
  • 出版日期: 2015-12-25