期刊
APPLIED PHYSICS LETTERS
卷 96, 期 24, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3451461
关键词
indium; infrared spectra; infrared spectroscopy; metal-insulator transition; nanowires; plasmonics
资金
- DFG-Germany [PU193/9]
- JST-Japan
- Spanish MICINN [FIS2007-66711-C02-02]
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT)
Infrared spectroscopy is demonstrated to sensitively detect electronic excitations in 1-nm-wide wires made of indium. The polarization-dependent spectra measured at room temperature show a strong broadband plasmonic absorption feature in the direction parallel to the wires, while in the perpendicular direction the wires stay nearly transparent in the same spectral range. At 88 K the wires do not show this broadband absorption anymore, but instead, several interband-transition features arise for both polarizations, in agreement to the gap opening of the metal-to-insulator transition as known for this one-dimensional structure. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3451461]
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