Development of magnetic responsive random lasers fabricated by a laser-induced surface roughness
Development of magnetic responsive random lasers fabricated by a laser-induced surface roughness
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DOI：
10.1063/5.0058284
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发表时间：
2021-07
影响因子：
4
通讯作者：
H. Fujiwara;Shohei Kawaguchi;Daiki Yonekawa;H. Kaiju
中科院分区：
文献类型：
--
作者：
H. Fujiwara;Shohei Kawaguchi;Daiki Yonekawa;H. Kaiju
利用强激光对镀有NiFe合金薄膜的GaN衬底表面进行粗糙化处理，研制了磁响应随机激光器。通过分散磁性材料和制造的表面粗糙度的GaN表面上的强激光脉冲照射后，我们证实了随机激光的阈值可以通过施加在衬底上的外部磁场来改变。这一结果表明，表面上残留的NiFe合金的磁光效应改变了局部随机反馈，导致激光行为的变化。因此，我们开发了一种简单的方法来制造磁响应随机激光器直接在半导体衬底上使用只有短的激光照射。
A magnetic responsive random laser was developed by roughening the surface of a NiFe alloy thin film-coated GaN substrate using an intense laser. By dispersing the magnetic materials and fabricating a surface roughness on the GaN surface after irradiation with intense laser pulses, we confirmed that the threshold of the random laser can be changed by applying an external magnetic field on the substrate. This result suggests that the magneto-optical effect of the residual NiFe alloy on the surface changes the local random feedback, leading to a change in the lasing behavior. Thus, we developed a simple method to fabricate a magnetically responsive random laser directly on a semiconductor substrate using only short laser irradiation.