Nanospheroidal particles as convenient nanoantenna elements

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（11）
• 页码范围: 96-99
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.112503.

摘要

A highly tunable optical nanoantenna element is proposed through gradual transformation from a sphere to a prolate spheroid.This new element induces field enhancement and an increase in resonance frequency.Rather than a purely metallic material,we propose the use of a metal-coated dielectric spheroid as a nanoelement because of its flexibility.We show that a spheroidal element enhances the near-field better than its rod and sphere counterparts.As such,spheroidal elements are good candidates for improving solar-cell performance.