Coherent infrared thermal emitters are useful in various applications, especially in the spectral region where laser and LED light sources are lacking. The present study investigates a vertical resonant cavity narrowband infrared thermal emitter (VRCITE) with a Fabry?Perot-like vacuum resonance cavity separating the one-dimensional photonic crystal and the gold layer. This configuration overcomes the thermal stress problem, which is the biggest inherent obstacle in similar structures previously proposed by other workers, and could achieve an even narrower emission spectrum (about 4?nm). Theoretical analysis with a transfer matrix method (TMM) is given and the finite-difference time domain method (FDTD) has been adopted to simulate this structure. The results obtained by TMM and FDTD methods are consistent and thus its feasibility is confirmed.
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Liang et al. (2009) studied this question.
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