Refractive Index Gas Sensing in a Hollow Photonic Crystal Cavity

We investigate hollow photonic crystal structures consisting in air-slot photonic crystal nanocavities. The high quality factor similar to 2.6x10(4) of such cavities along with a strong overlap between the resonant mode and the hollow core region allows for a strong interaction with an optically active medium in the air slot. This is illustrated in achieving highly sensitive refractive index sensing of a gas infiltrated in the slot. An experimental sensitivity of 610 nm per refractive index unit (RUI) and a detection limit below 1x10(-5) RUI are demonstrated. The device has a remarkably low sensing volume of 40 attoliters, which at atmospheric pressure and room temperature contains as little as 1x10(6) molecules.


Published in:
2010 12Th International Conference On Transparent Optical Networks (Icton)
Presented at:
12th International Conference on Transparent Optical Networks (ICTON)
Year:
2011
Publisher:
New York, Ieee
ISSN:
2162-7339
ISBN:
978-1-4244-7798-2
Keywords:
Laboratories:




 Record created 2013-02-27, last modified 2018-03-18


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)