|
CAS Key Laboratory of Theoretical Physics |
|
Institute of Theoretical Physics |
|
Chinese Academy of Sciences |
|
Seminar |
|
Title
题目 |
|
Superanomalous skin effect for surface plasmon-polaritons | |
|
Speaker
报告人 |
|
|
Affiliation
所在单位 |
|
Institute of Microelectronics, Russian Academy of Sciences | |
|
Date
日期 |
|
|
Venue
地点 |
Conference Room 6620, ITP new building |
|
Abstract
摘要 |
|
It is commonly assumed that surface plasmon-polariton (SPP) excitations on a metal-dielectric interface decay exponentially inside the metallic sample. Here we show that at high frequency and wave vector the SPP field decays much slower, being inversely proportional to the distance to the interface modified by an additional logarithmic factor. This dependence differs from the standard anomalous skin effect where field decays as (1/z)^2. We provisionally referred to it as “superanomalous”. Its origin is the non-locality and the logarithmic singularity of the dielectric permittivity in metals. This type of decay is pronounced for SPP modes of higher frequencies, but is suppressed for red – infrared light range. | |
|
Contact Person
所内联系人 |
|
