TY - JOUR
T1 - Negative effective mass in plasmonic systems II
T2 - Elucidating the optical and acoustical branches of vibrations and the possibility of anti-resonance propagation
AU - Bormashenko, Edward
AU - Legchenkova, Irina
AU - Frenkel, Mark
N1 - Publisher Copyright:
© 2020 by the authors.
PY - 2020/8
Y1 - 2020/8
N2 - We report the negative effective mass metamaterials based on the electro-mechanical coupling exploiting plasma oscillations of free electron gas. The negative mass appears as a result of the vibration of a metallic particle with a frequency ω which is close to the frequency of the plasma oscillations of the electron gas m2, relative to the ionic lattice m1. The plasma oscillations are represented with the elastic spring constant where ωp is the plasma frequency. Thus, the metallic particle vibrating with the external frequency ω is described by the effective mass which is negative when the frequency ω approaches ωp from above. The idea is exemplified with two conducting metals, namely Au and Li embedded in various matrices. We treated a one-dimensional lattice built from the metallic micro-elements me f f connected by ideal springs with the elastic constant k1 representing various media such as polydimethylsiloxane and soda-lime glass. The optical and acoustical branches of longitudinal modes propagating through the lattice are elucidated for various ratios where and k1 represents the elastic properties of the medium. The 1D lattice, built from the thin metallic wires giving rise to low frequency plasmons, is treated. The possibility of the anti-resonant propagation, strengthening the effect of the negative mass occurring under ω = ωp = ω1, is addressed.
AB - We report the negative effective mass metamaterials based on the electro-mechanical coupling exploiting plasma oscillations of free electron gas. The negative mass appears as a result of the vibration of a metallic particle with a frequency ω which is close to the frequency of the plasma oscillations of the electron gas m2, relative to the ionic lattice m1. The plasma oscillations are represented with the elastic spring constant where ωp is the plasma frequency. Thus, the metallic particle vibrating with the external frequency ω is described by the effective mass which is negative when the frequency ω approaches ωp from above. The idea is exemplified with two conducting metals, namely Au and Li embedded in various matrices. We treated a one-dimensional lattice built from the metallic micro-elements me f f connected by ideal springs with the elastic constant k1 representing various media such as polydimethylsiloxane and soda-lime glass. The optical and acoustical branches of longitudinal modes propagating through the lattice are elucidated for various ratios where and k1 represents the elastic properties of the medium. The 1D lattice, built from the thin metallic wires giving rise to low frequency plasmons, is treated. The possibility of the anti-resonant propagation, strengthening the effect of the negative mass occurring under ω = ωp = ω1, is addressed.
KW - Low frequency plasmons
KW - Metamaterials
KW - Negative effective mass
KW - Optical and acoustical branches
KW - Plasma oscillations
UR - http://www.scopus.com/inward/record.url?scp=85090026997&partnerID=8YFLogxK
U2 - 10.3390/MA13163512
DO - 10.3390/MA13163512
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AN - SCOPUS:85090026997
SN - 1996-1944
VL - 13
JO - Materials
JF - Materials
IS - 16
M1 - 3512
ER -