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We present a class of compact, monolithic, photonic sensors consisting of multiple section edge emitting lasers with functionalized lateral surface coatings for low level detection of chemical or biological agents. Specifically, we discuss 8 {micro}m x 250 {micro}m Pd-coated H{sub 2} sensors and configurations to reduce the minimum detection limit from 138ppm for passive sensors to 1ppm for active sensors. Compared with conventional optical H{sub 2} sensors that use fiber gratings, surface plasmon resonances, or surface reflectance, our sensors offer the advantages of smaller size, wider dynamic range, monolithic integration of laser source and detector, and 2-D scalability to arrays of sensors that are functionalized to detect different agents.
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| Authors: |
Goddard, L L;
Bond, T C;
Cole, G D;
Behymer, E M
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| Publication Date: | 2007 Jul 05 |
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| OSTI Identifier: | 920868 |
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| Report Number(s): | UCRL-CONF-232540 |
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| DOE Contract Number: | W-7405-ENG-48 |
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| Resource Type: | Conference/Event |
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| Resource Relation: | Presented at: IEEE Sensors Conference, Atlanta, GA, United States, Oct 28 - Oct 31, 2007 |
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| Research Org: | Lawrence Livermore National Laboratory (LLNL), Livermore, CA |
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| Sponsoring Org: | USDOE |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: PDF-file: 6 pages; size: 0.3 Mbytes |
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| Other Number(s): | TRN: US0802037 |
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| Subject: | 42 ENGINEERING; 42 ENGINEERING; DETECTION; FIBERS; LASERS; PLASMONS; SENSITIVITY; SURFACE COATING |
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| Update Date: | 2008 Apr 07 |
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