强绝热电场中纳米薄膜的金属化。

Metallization of nanofilms in strong adiabatic electric fields.

机构信息

Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA.

出版信息

Phys Rev Lett. 2010 Aug 20;105(8):086803. doi: 10.1103/PhysRevLett.105.086803. Epub 2010 Aug 18.

DOI:10.1103/PhysRevLett.105.086803

PMID:20868124

Abstract

We introduce an effect of metallization of dielectric nanofilms by strong, adiabatically varying electric fields. The metallization causes optical properties of a dielectric film to become similar to those of a plasmonic metal (strong absorption and negative permittivity at low optical frequencies). This is a quantum effect, which is exponentially size-dependent, occurring at fields on the order of 0.1 V/Å and pulse durations ranging from ∼1 fs to ∼10 ns for a film thickness of 3-10 nm.

摘要

我们介绍了通过强、绝热变化电场使介电纳米薄膜金属化的一种效应。这种金属化使得介电薄膜的光学性质变得类似于等离子体金属的光学性质（在低光学频率下具有强吸收和负介电常数）。这是一种量子效应，其尺寸依赖性呈指数增长，在电场强度约为 0.1 V/Å，薄膜厚度为 3-10nm 时，脉冲持续时间从 ∼1 fs 到 ∼10 ns 不等的情况下发生。