Laser & Optoelectronics Progress, Volume. 48, Issue 6, 60402(2011)
Narrow-Band Infrared Emission/Absorption Structure Based on Metal-Dielectric-Metal Grating
A metal-dielectric-metal grating infrared emission/absorption structure is designed for narrow-band infrared emitters or detectors in application of spectral imaging sensors and biomaterial absorption spectroscopy. By using finite difference time domain (FDTD) method, reflection spectrum of the one dimensional Ag/Si3N4/Ag grating structure is simulated. The results show that very narrow mid-infrared emission/absorption peak is generated in this structure for both TE and TM polarizations and emittance above 98% at the central frequencies can be achieved for both polarizations over a broad emission direction. The origin of this performance is believed to come from the excitation of waveguide mode and surface plasmon mode in this structure.
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Lai Jianjun, Liang Huafeng, Wang Bin, Zhai Xiaofeng. Narrow-Band Infrared Emission/Absorption Structure Based on Metal-Dielectric-Metal Grating[J]. Laser & Optoelectronics Progress, 2011, 48(6): 60402
Category: Detectors
Received: Aug. 23, 2010
Accepted: --
Published Online: May. 9, 2011
The Author Email: Jianjun Lai (jjlai@mail.hust.edu.cn)