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将具有高本征吸收的极化材料SiC引入到一维光子晶体中间,形成一维光子晶体微腔。利用传输矩阵方法,研究了这种含SiC材料的一维光子晶体微腔的光学特性:包括透射率、反射率和吸收率。研究结果表明该结构在波长λ=12.6μm处存在一个全吸收峰,该吸收峰在0°～50°的入射角度范围内不随角度和偏振模式的影响。该结构可以用来制作宽角度窄带全吸收器件,有望在热发射、太阳能光伏电池中得到应用。
Polarization material SiC with high intrinsic absorption is introduced into the middle of a one-dimensional photonic crystal to form a one-dimensional photonic crystal microcavity. The optical properties of a one-dimensional photonic crystal microcavity containing SiC material were studied by transmission matrix method, including transmittance, reflectance and absorption. The results show that the structure has a full absorption peak at the wavelength of λ = 12.6μm. The absorption peak does not change with the angle and the polarization mode in the incident angle range from 0 ° to 50 °. The structure can be used to make wide-angle narrow-band full absorption device, which is expected to be used in thermal emission and solar photovoltaic cells.