TY - JOUR
T1 - Localized surface plasmon resonance properties of Ag nanorod arrays on graphene-coated Au substrate
AU - Mu, Haiwei
AU - Lv, Jingwei
AU - Liu, Chao
AU - Sun, Tao
AU - Chu, Paul K.
AU - Zhang, Jingping
PY - 2017/11/1
Y1 - 2017/11/1
N2 - Localized surface plasmon resonance (LSPR) on silver nanorod (SNR) arrays deposited on a graphene-coated Au substrate is investigated by the discrete dipole approximation (DDA) method. The resonance peaks in the extinction spectra of the SNR/graphene/Au structure show significantly different profiles as SNR height, and refractive index of the surrounding medium are varied gradually. Numerical simulation reveals that the shifts in the resonance peaks arise from hybridization of multiple plasmon modes as a result of coupling between the SNR arrays and graphene-coated Au substrate. Moreover, the LSPR modes blue-shifts from 800 nm to 700 nm when the thickness of the graphene layer in the metal nanoparticle (NP) - graphene hybrid nanostructure increases from 1 nm to 5 nm, which attribute to charge transfer between the graphene layer and SNR arrays. The results provide insights into metal NP-graphene hybrid nanostructures which have potential applications in plasmonics.
AB - Localized surface plasmon resonance (LSPR) on silver nanorod (SNR) arrays deposited on a graphene-coated Au substrate is investigated by the discrete dipole approximation (DDA) method. The resonance peaks in the extinction spectra of the SNR/graphene/Au structure show significantly different profiles as SNR height, and refractive index of the surrounding medium are varied gradually. Numerical simulation reveals that the shifts in the resonance peaks arise from hybridization of multiple plasmon modes as a result of coupling between the SNR arrays and graphene-coated Au substrate. Moreover, the LSPR modes blue-shifts from 800 nm to 700 nm when the thickness of the graphene layer in the metal nanoparticle (NP) - graphene hybrid nanostructure increases from 1 nm to 5 nm, which attribute to charge transfer between the graphene layer and SNR arrays. The results provide insights into metal NP-graphene hybrid nanostructures which have potential applications in plasmonics.
KW - DDA
KW - LSPR
KW - SNR/graphene/Au substrate
UR - http://www.scopus.com/inward/record.url?scp=85020541662&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85020541662&origin=recordpage
U2 - 10.1016/j.optcom.2017.06.002
DO - 10.1016/j.optcom.2017.06.002
M3 - RGC 21 - Publication in refereed journal
SN - 0030-4018
VL - 402
SP - 216
EP - 220
JO - Optics Communications
JF - Optics Communications
ER -