Asano Takashi, Song Bong-Shik, Noda Susumu
Opt Express. 2006 Mar 6;14(5):1996-2002. doi: 10.1364/oe.14.001996.
In this letter, we show that the Q factors of the latest high-Q cavities in two dimensional photonic crystals, measured experimentally to be ~1000000, are determined by losses due to imperfections in the fabricated structures, and not by the cavity design. Quantitative analysis shows that the dominant sources of loss include the tilt of air-holes within the cavity, the roughness of the inner walls of the air-holes, variation in the radii of the air-holes, and optical absorption by adsorbed material. We believe that cavities with experimental Q factors of the order of several millions will be obtained in the future by reducing the losses due to imperfections through improved fabrication techniques.
在这封信中，我们表明二维光子晶体中最新的高Q腔的品质因数经实验测量约为1000000，它是由制造结构中的缺陷导致的损耗所决定，而非由腔的设计决定。定量分析表明，主要的损耗源包括腔内气孔的倾斜、气孔内壁的粗糙度、气孔半径的变化以及吸附材料的光吸收。我们相信，通过改进制造技术减少因缺陷导致的损耗，未来将获得实验品质因数达数百万量级的腔。
