Journal
OPTICS EXPRESS
Volume 19, Issue 1, Pages 107-117Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.000107
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Funding
- National Science Foundation [ECS 0823827]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0823827] Funding Source: National Science Foundation
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It is demonstrated that surface plasmon sensing can be performed in the shot-noise-limited regime to resolve index of refractive changes on the order of 10(-10)/root Hz at input powers of 1 mW. This improved resolution is achieved by using active electronic noise cancelling to suppress laser intensity noise and a wavelength that maximizes sensitivity to index of refraction changes occurring at an interface. The resolution of the system is experimentally demonstrated by measuring the refractive index change of air in response to pressure changes. (C)2010 Optical Society of America
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