Large positive and negative Goos-Hänchen shifts near the surface plasmon resonance in subwavelength gratingстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 15 апреля 2020 г.
Аннотация:Diffraction of light of a visible spectral range by subwavelength metal gratings has
been investigated experimentally and theoretically using rigorous electromagnetic calculations.
It has been demonstrated that an effect of surface plasmon resonance (SPR), at which total
absorption of light by metal grating can be observed, occurs under certain conditions. Large
positive and negative Goos-Hänchen (GH) shifts occur near the SPR. It has been shown that the
reflected beam is split into two parts, the relative powers of which depend on the incident beam
width and the grating depth. The dependence of the GH shifts on the grating period and grating
depth has been investigated for different incident beam widths. The high sensitivity of the GH
shift on the incident angle of a light beam near the SPR has been demonstrated