Shainline Jeffrey, Elston Stuart, Liu Zhijun, Fernandes Gustavo, Zia Rashid, Xu Jimmy
Department of Physics, 184 Hope St., Brown University, Providence, RI 02912, USA.
Opt Express. 2009 Dec 7;17(25):23323-31. doi: 10.1364/OE.17.023323.
We present a study of the first silicon microdisk resonators which are smaller than the free-space resonant wavelength in all spatial dimensions. Spectral details of whispering gallery modes with azimuthal mode number m = 4-7 are measured in microdisks with diameters between 1.35 and 1.89microm and are studied at wavelengths from 1.52 to 1.62microm. For the structures considered here, m = 5 is the highest azimuthal mode order in a subwavelength cavity and has measured Q = 1250. These results agree well with theoretical calculations using a finite difference frequency domain method and fit an exponential scaling law relating Q to disk radius via m.
我们展示了对首批硅微盘谐振器的研究，这些谐振器在所有空间维度上都小于自由空间谐振波长。在直径介于1.35至1.89微米之间的微盘中测量了方位模数m = 4 - 7的回音壁模式的光谱细节，并在波长为1.52至1.62微米的条件下进行了研究。对于此处所考虑的结构，m = 5是亚波长腔中最高的方位模阶数，并且测得品质因数Q = 1250。这些结果与使用有限差分频域方法的理论计算结果吻合良好，并且符合通过m将Q与盘半径相关联的指数缩放定律。
