Barrier potential for laser written graphitic wires in diamond
Barrier potential for laser written graphitic wires in diamond
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DOI：
10.1016/j.diamond.2020.108164
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发表时间：
2021-01-16
影响因子：
4.1
通讯作者：
Allegre, O.
中科院分区：
文献类型：
--
作者：
Haughton, I.;Paz, I. Lopez;Allegre, O.
金刚石衬底支持由飞秒脉冲激光雕刻的导电石墨线的内部阵列，在一系列应用中对电离辐射的检测是有用的。本文研究了激光加工过程中涉及的各种参数，以了解它们对导线电性能的影响。这项研究揭示了一种效应，即导线表现出绝缘行为，直到克服了势垒。当施加足够高的电压时，导线显示欧姆行为。势垒势的大小，在某些情况下超过300 V，显示出强烈依赖于激光制造参数。通过工艺优化，可以最小化并有效地消除电位障碍，同时降低导线电阻值。
Diamond substrates supporting an internal array of conductive graphitic wires inscribed by a femtosecond pulse laser, are useful for the detection of ionising radiation in a range of applications. Various parameters involved in the laser fabrication process were investigated in this paper to understand their impact on the electrical properties of the wires. The study revealed an effect, whereby the wires exhibit insulating behaviour until a barrier potential is overcome. When high enough voltages are applied, the wires display ohmic behaviour. The magnitude of the barrier potential, which in some cases exceeds 300 V, is shown to be strongly dependent on the laser fabrication parameters. Through process optimisation, the potential barrier may be minimised and effectively removed, coinciding with reduced values of the wire resistance.