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Phosphorus-Doped Silicon Nanocrystals Exhibiting Mid-Infrared Localized Surface Plasmon Resonance
journal contribution
posted on 2013-03-13, 00:00 authored by David
J. Rowe, Jong Seok Jeong, K. Andre Mkhoyan, Uwe R. KortshagenLocalized surface plasmon resonances
(LSPRs) enable tailoring of
the optical response of nanomaterials through their free carrier concentration,
morphology, and dielectric environment. Recent efforts to expand the
spectral range of usable LSPR frequencies into the infrared successfully
demonstrated LSPRs in doped semiconductor nanocrystals. Despite silicon’s
importance for electronic and photonic applications, no LSPRs have
been reported for doped silicon nanocrystals. Here we demonstrate
doped silicon nanocrystals synthesized via a nonthermal plasma technique
that exhibits tunable LSPRs in the energy range of 0.07–0.3
eV or mid-infrared wavenumbers of 600–2500 cm–1.