A high-resolution spectrometer based on a compact planar two dimensional photonic crystal cavity array

作者：Gan Xuetao^*; Pervez Nadia; Kymissis Ioannis; Hatami Fariba; Englund Dirk

来源：Applied Physics Letters, 2012, 100(23): 231104.

DOI：10.1063/1.4724177

We demonstrate a compact spectrometer based on an array of high-quality-factor photonic crystal nanocavities, coupled via a planar two-dimensional waveguide. This architecture enables spectral analysis of incident light with resolution as high as the bandwidth of the cavity mode-0.3 nm at 840 nm for our device. The design is easily extended to the visible and deep-infrared spectral ranges. The two-dimensional cavity array can be mated to commercial two-dimensional optical detector arrays, creating a compact and high-resolution spectrometer suitable for a range of applications including materials and chemical analysis.

• 出版日期2012-6-4