On-chip gas detection in silicon optical microcavities

Opt Express. 2008 Mar 17;16(6):4296-301. doi: 10.1364/oe.16.004296.

Abstract

We demonstrate a chip-scale photonic system for the room-temperature detection of gas composition and pressure using a slotted silicon microring resonator. We measure shifts in the resonance wavelength due to the presence and pressure of acetylene gas and resolve differences in the refractive index as small as 10(-4) in the near-IR. The observed sensitivity of this device (enhanced due to the slot-waveguide geometry) agrees with the expected value of 490 nm/refractive index unit.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Acetylene / analysis*
  • Equipment Design
  • Equipment Failure Analysis
  • Gases / analysis*
  • Optics and Photonics / instrumentation*
  • Silicon / chemistry*
  • Spectrum Analysis / instrumentation*
  • Transducers*

Substances

  • Gases
  • Acetylene
  • Silicon