Plasmons-the collective oscillations of valence electrons in conducting materials-possess a number of appealing properties for photonic technologies , the most salient of which are (1) their small spatial extension compared with the light wavelength, which has been exploited to achieve improved imaging resolution ; (2) their strong interaction with light, which is evidenced by a centenary tradition of generating colors through plasmon supporting metal nanoparticle suspensions ; and (3) the huge optical enhancements produced by this strong interaction, which upon external illumination result in near-field intensities > 105 times larger than the incident light intensity as inferred from 102Surface-enhanced Raman scattering (SERS) measurements . Control over the spectral and spatial properties of these collective excitations has advanced at an impressive pace in recent years [5,6]. Equally impressive are their applications to ultrasensitive detection down to the single-molecule level , improved photovoltaics , nanoscale photometry , cancer therapy , and nonlinear optics , among other feats.
|Title of host publication||Graphene Photonics, Optoelectronics, and Plasmonics|
|Editors||Qiaoliang Bao, Hui Ying Hoh, Yupeng Zhang|
|Place of Publication||Singapore Singapore|
|Publisher||Pan Stanford Publishing|
|Number of pages||30|
|Publication status||Published - 2017|