Low energy-density recording with a high-repetition-rate laser beam in gold-nanorod-embedded discs
Low energy-density recording with a high-repetition-rate laser beam in gold-nanorod-embedded discs
复制标题
DOI：
10.1364/oe.20.024516
复制
发表时间：
2012-10-22
期刊：
影响因子：
3.8
通讯作者：
Gu, Min
中科院分区：
文献类型：
--
作者：
Ullah, Md Azim;Li, Xiangping;Gu, Min
在本文中，我们报告的低能量密度记录与高重复率的飞秒脉冲光束在均匀的金纳米棒分散光盘使用低数值孔径（NA）微光学。通过使用低NA DVD光学头以82 MHz的重复率聚焦飞秒脉冲束，空间拉伸的能量密度引入聚合物基质的温度上升。这种温度升高有利于金纳米棒的表面熔化，这导致记录的能量密度阈值降低超过一个数量级，与通过高NA物镜聚焦单脉冲相比。应用这一发现，我们证明了双层记录在金纳米棒分散的光盘与69 GB的等效容量。我们的研究结果表明，超高密度三维光存储器的低成本和DVD兼容的设备的潜力。(C)2012美国光学学会
In this paper, we report on the low energy-density recording with a high-repetition-rate femtosecond pulsed beam in homogenous gold-nanorod-dispersed discs by using low numerical aperture (NA) microoptics. By focusing a femtosecond pulsed beam at a repetition rate of 82 MHz using a low NA DVD optical head, the spatially-stretched energy density introduces a temperature rising of the polymer matrix. This temperature rising facilitates the surface melting of gold nanorods, which leads to over one-order-of-magnitude reduction in the energy-density threshold for recording, compared with that by focusing single pulses through a high NA objective. Applying this finding, we demonstrate the dual-layer recording in gold-nanorod-dispersed discs with an equivalent capacity of 69 GB. Our results demonstrate the potential of ultra-high density three-dimensional optical memory with a low-cost and DVD-compatible apparatus. (C) 2012 Optical Society of America