Coherent emission of light using stacked gratings

Gong, Yongkang, Liu, Xianliang, Li, Kang, Huang, Jungang, Martinez, J. J., Rees-Whippey, Daniel, Carver, Sara, Wang, Leiran, Zhang, Wenfu, Duan, Tao and Copner, Nigel 2013. Coherent emission of light using stacked gratings. Physical Review B 87 (20) , 205121. 10.1103/PhysRevB.87.205121

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Abstract

The possibility of temporally and spatially coherent thermal emission has been demonstrated utilizing stacked 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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Physical Society
ISSN:	1098-0121
Last Modified:	05 Aug 2022 01:46
URI:	https://orca.cardiff.ac.uk/id/eprint/119600

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