A GAAS ALGAAS-BASED REFRACTOMETER PLATFORM FOR INTEGRATED OPTICAL SENSING APPLICATIONS/

Authors
MAISENHOLDER B ZAPPE HP KUNZ RE RIEL P MOSER M EDLINGER J
Citation
B. Maisenholder et al., A GAAS ALGAAS-BASED REFRACTOMETER PLATFORM FOR INTEGRATED OPTICAL SENSING APPLICATIONS/, Sensors and actuators. B, Chemical, 39(1-3), 1997, pp. 324-329
Citations number
14
Categorie Soggetti
Electrochemistry,"Chemistry Analytical","Instument & Instrumentation
Journal title
Sensors and actuators. B, Chemical → ACNP
ISSN journal
09254005
Volume
39
Issue
1-3
Year of publication
1997
Pages
324 - 329
Database
ISI
SICI code
0925-4005(1997)39:1-3<324:AGARPF>2.0.ZU;2-S
Abstract
We present a new type of integrated optical refractometer, based on a Mach-Zehnder interferometer using III-V semiconductor and TiO2 on SiO2 waveguides. We report on the design, optimized for high sensitivity i n immunoassay sensing applications, and the fabrication of this sensor chip. Using a test liquid system of ethanol in water, we demonstrate a refractive-index resolution of 1 X 10(-5) for this refractometer. Th is device is a basic building block of a novel, monolithically integra ted optical sensing circuit, which can be used for example in chemical or immunological sensing applications.