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Optical detection of plasmonic and interband excitations in 1-nm-wide indium atomic wires

AuthorsRigamonti, S.; Sánchez-Portal, Daniel ; Pucci, Annemarie; Nagao, Tadaaki
Issue DateJun-2010
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 96(24): 243101 (2010)
AbstractInfrared 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.
Description3 páginas, 3 figuras.-- et al.
Publisher version (URL)http://dx.doi.org/10.1063/1.3451461
Appears in Collections:(CFM) Artículos
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