Near-field optical properties and surface plasmon effects generated by a dielectric hole in a silver-shell nanocylinder pair

Yuan-Fong Chau, Han-Hsuan Yeh, Din Ping Tsai
2008 Applied Optics  
Near-field optical properties and surface plasmon effects in a silver-shell nanocylinder pair with five different dielectric holes (DHs) that interact with a transverse magnetic mode incident plane wave are simulated by use of the finite-element method, which includes the investigation of particle-particle interaction. The proposed structure exhibits a redshifted localized surface plasmon that can be tuned over an extended wavelength range by varying the dielectric constant in DHs and the
more » ... ess of the nanocylinder silver shell. The increase in the near-field intensity is attributed to a larger effective size of DH that is filled with a higher refractive medium.
doi:10.1364/ao.47.005557 pmid:18936803 fatcat:r72kylbz65hpfhtz65hwdzbkqq