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Title: Indium phosphide-based monolithically integrated PIN waveguide photodiode readout for resonant cantilever sensors

An integrated photodiode displacement readout scheme for a microelectromechanical cantilever waveguide resonator sensing platform is presented. III-V semiconductors are used to enable the monolithic integration of passive waveguides with active optical components. This work builds upon previously demonstrated results by measuring the displacement of cantilever waveguide resonators with on-chip waveguide PIN photodiodes. The on-chip integration of the readout provides an additional 70% improvement in mass sensitivity compared to off-chip photodetector designs due to measurement stability and minimized coupling loss. In addition to increased measurement stability, reduced packaging complexity is achieved due to the simplicity of the readout design. We have fabricated cantilever waveguides with integrated photodetectors and experimentally characterized these cantilever sensors with monolithically integrated PIN photodiodes.
Authors:
 [1] ;  [2] ; ;  [1] ; ;  [3]
  1. Department of Electrical and Computer Engineering, Institute for Systems Research, University of Maryland, College Park, Maryland 20742 (United States)
  2. (United States)
  3. Laboratory for the Physical Sciences, 8050 Greenmead Drive, College Park, Maryland 20740 (United States)
Publication Date:
OSTI Identifier:
22350860
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COUPLING; INDIUM PHOSPHIDES; LOSSES; MASS; PHOTODETECTORS; PHOTODIODES; READOUT SYSTEMS; RESONATORS; SEMICONDUCTOR MATERIALS; SENSITIVITY; SENSORS; STABILITY; WAVEGUIDES