Simulation and optimization of pyramidal AlGaAs probe with ultra-small spot size and high throughput

• 来源期刊: 中国物理（英文版）
• 关键词: near field optical storage ultra-small spot size throughput pyramidal AlGaAs probe finite-difference time-domain (FDTD) method
• 年，卷（期）: 2005,（1）
• 页码范围: 133-136
• 页数: 4页
• 语种: 英文

摘要

In this paper, the light-emitting spot sizes and throughputs of the four types of probes are studied using the finitedifference time-domain method, and these probes are also compared in performance. Among these probes, a pyramidal AlGaAs tip coated entirely with a thin Ag film can provide the highest throughput and a single near-field spot size.Probe coated with a 3nm Ag film and incident light with a wavelength of 800nm seems to offer the optimum condition for high throughput and ultra-small spot size, which enables the realization of ultra-high density storage.