TY - JOUR
T1 - Localization versus delocalization of surface plasmons in nanosystems
T2 - Can one state have both characteristics?
AU - Stockman, Mark I.
AU - Faleev, Sergey V.
AU - Bergman, David J.
PY - 2001/9/27
Y1 - 2001/9/27
N2 - From a partial-differential eigenproblem, without use of dipole approximation, we show that the eigenmodes (surface plasmons) of disordered nanosystems (modeled as random planar composites) are not universally Anderson localized, but can have properties of both localized and delocalized states simultaneously. Their topology is determined by separate small-scale “hot spots” that are distributed and coherent over a length that may be comparable to the total size of the system. Coherence lengths and oscillator strengths vary by orders of magnitude from mode to mode at nearby frequencies. The existence of dark vs luminous eigenmodes is established and attributed to the effect of charge- and parity-conservation laws. Possible applications are discussed.
AB - From a partial-differential eigenproblem, without use of dipole approximation, we show that the eigenmodes (surface plasmons) of disordered nanosystems (modeled as random planar composites) are not universally Anderson localized, but can have properties of both localized and delocalized states simultaneously. Their topology is determined by separate small-scale “hot spots” that are distributed and coherent over a length that may be comparable to the total size of the system. Coherence lengths and oscillator strengths vary by orders of magnitude from mode to mode at nearby frequencies. The existence of dark vs luminous eigenmodes is established and attributed to the effect of charge- and parity-conservation laws. Possible applications are discussed.
UR - http://www.scopus.com/inward/record.url?scp=85038299610&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.87.167401
DO - 10.1103/PhysRevLett.87.167401
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AN - SCOPUS:85038299610
SN - 0031-9007
VL - 87
JO - Physical Review Letters
JF - Physical Review Letters
IS - 16
ER -