Abstract
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.
Original language | English |
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Article number | 231104 |
Journal | Applied Physics Letters |
Volume | 100 |
Issue number | 23 |
DOIs | |
State | Published - 4 Jun 2012 |
Externally published | Yes |