Abstract In this paper, the light-emitting spot sizes and throughputs of the four types of probes are studied using the finite-difference 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.
Received: 16 December 2003
Revised: 03 December 2004
Accepted manuscript online:
Fund: Project supported by the National Science Foundation of China (Grant No 30270367).
Cite this article:
Wang Xiao-Qiu (王晓秋), Wu Shi-Fa (吴世法), Jian Guo-Shu (简国树), Pan Shi (潘石) Simulation and optimization of pyramidal AlGaAs probe with ultra-small spot size and high throughput 2005 Chinese Physics 14 133
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