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

Xuetao Gan, Nadia Pervez, Ioannis Kymissis, Fariba Hatami, Dirk Englund

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

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 languageEnglish
Article number231104
JournalApplied Physics Letters
Volume100
Issue number23
DOIs
StatePublished - 4 Jun 2012
Externally publishedYes

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