Abstract
We report measurements of near-field absorption in heavily silicon-doped indium arsenide microparticles using atomic force microscope infrared spectroscopy (AFM-IR). The microparticles exhibit an infrared absorption peak at 5.75 μm, which corresponds to a localized surface plasmon resonance within the microparticles. The near-field absorption measurements agree with far-field measurements of transmission and reflection, and with results of numerical solutions of Maxwell equations. AFM-IR measurements of a single microparticle show the temperature increase expected from Ohmic heating within the particle, highlighting the potential for high resolution infrared imaging of plasmonic and metamaterial structures.
Original language | English (US) |
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Article number | 152110 |
Journal | Applied Physics Letters |
Volume | 102 |
Issue number | 15 |
DOIs | |
State | Published - Apr 15 2013 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)