Coherent emission of light using stacked gratings
Coherent emission of light using stacked gratings
复制标题
使用堆叠光栅进行光的相干发射
DOI：
10.1103/physrevb.87.205121
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发表时间：
2013-05-14
影响因子：
3.7
通讯作者：
Copner, Nigel
中科院分区：
文献类型：
--
作者：
Gong, Yongkang;Liu, Xianliang;Copner, Nigel
光栅。我们证明了具有窄空气狭缝的金属光栅表现为具有大介电常数和小磁导率的均匀平板，并发现金属光栅和布拉格光栅之间的相互作用在布拉格光栅的光子带隙内的波长处产生阻抗匹配，这使得堆叠光栅能够实现具有超窄光谱和天线状空间响应的高发射。这为设计一种新型红外光源平台铺平了道路，该平台可用于热分析、成像、安全、生物传感和医疗诊断等应用。
gratings. We demonstrate that the metallic grating with narrow air slit behaves like a homogeneous slab with large permittivity and small permeability and find that the interaction between the metallic grating and the Bragg grating gives rise to impendence matching at wavelengths located in the photonic band gap of the Bragg grating, which enables the stacked gratings to perform high emission with ultranarrow spectrum and antenna-like spatial response. This paves the way towards the design of a novel infrared source platform for applications such as thermal analysis, imaging, security, biosensing, and medical diagnoses.