Efficient Chemical Sensing by Coupled Slot SOI Waveguides
A guided-wave chemical sensor for the detection of environmental pollutants or biochemical substances has been designed. The sensor is based on an asymmetric directional coupler employing slot optical waveguides. The use of a nanometer guiding structure where optical mode is confined in a low-index...
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Format: | Article |
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MDPI AG
2009-02-01
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Series: | Sensors |
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Online Access: | http://www.mdpi.com/1424-8220/9/2/1012/ |
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author | Mario N. Armenise Caterina Ciminelli Vittorio M. N. Passaro Francesco Dell’Olio |
author_facet | Mario N. Armenise Caterina Ciminelli Vittorio M. N. Passaro Francesco Dell’Olio |
author_sort | Mario N. Armenise |
collection | DOAJ |
description | A guided-wave chemical sensor for the detection of environmental pollutants or biochemical substances has been designed. The sensor is based on an asymmetric directional coupler employing slot optical waveguides. The use of a nanometer guiding structure where optical mode is confined in a low-index region permits a very compact sensor (device area about 1200 μm2) to be realized, having the minimum detectable refractive index change as low as 10-5. Silicon-on-Insulator technology has been assumed in sensor design and a very accurate modelling procedure based on Finite Element Method and Coupled Mode Theory has been pointed out. Sensor design and optimization have allowed a very good trade-off between device length and sensitivity. Expected device sensitivity to glucose concentration change in an aqueous solution is of the order of 0.1 g/L. |
first_indexed | 2024-04-11T13:13:02Z |
format | Article |
id | doaj.art-e1c976aefc7a42719673a779bbcf4b7f |
institution | Directory Open Access Journal |
issn | 1424-8220 |
language | English |
last_indexed | 2024-04-11T13:13:02Z |
publishDate | 2009-02-01 |
publisher | MDPI AG |
record_format | Article |
series | Sensors |
spelling | doaj.art-e1c976aefc7a42719673a779bbcf4b7f2022-12-22T04:22:28ZengMDPI AGSensors1424-82202009-02-01921012103210.3390/s90201012Efficient Chemical Sensing by Coupled Slot SOI WaveguidesMario N. ArmeniseCaterina CiminelliVittorio M. N. PassaroFrancesco Dell’OlioA guided-wave chemical sensor for the detection of environmental pollutants or biochemical substances has been designed. The sensor is based on an asymmetric directional coupler employing slot optical waveguides. The use of a nanometer guiding structure where optical mode is confined in a low-index region permits a very compact sensor (device area about 1200 μm2) to be realized, having the minimum detectable refractive index change as low as 10-5. Silicon-on-Insulator technology has been assumed in sensor design and a very accurate modelling procedure based on Finite Element Method and Coupled Mode Theory has been pointed out. Sensor design and optimization have allowed a very good trade-off between device length and sensitivity. Expected device sensitivity to glucose concentration change in an aqueous solution is of the order of 0.1 g/L.http://www.mdpi.com/1424-8220/9/2/1012/Integrated opticsOptical sensorSlot waveguidesSilicon-on-insulator |
spellingShingle | Mario N. Armenise Caterina Ciminelli Vittorio M. N. Passaro Francesco Dell’Olio Efficient Chemical Sensing by Coupled Slot SOI Waveguides Sensors Integrated optics Optical sensor Slot waveguides Silicon-on-insulator |
title | Efficient Chemical Sensing by Coupled Slot SOI Waveguides |
title_full | Efficient Chemical Sensing by Coupled Slot SOI Waveguides |
title_fullStr | Efficient Chemical Sensing by Coupled Slot SOI Waveguides |
title_full_unstemmed | Efficient Chemical Sensing by Coupled Slot SOI Waveguides |
title_short | Efficient Chemical Sensing by Coupled Slot SOI Waveguides |
title_sort | efficient chemical sensing by coupled slot soi waveguides |
topic | Integrated optics Optical sensor Slot waveguides Silicon-on-insulator |
url | http://www.mdpi.com/1424-8220/9/2/1012/ |
work_keys_str_mv | AT marionarmenise efficientchemicalsensingbycoupledslotsoiwaveguides AT caterinaciminelli efficientchemicalsensingbycoupledslotsoiwaveguides AT vittoriomnpassaro efficientchemicalsensingbycoupledslotsoiwaveguides AT francescodellolio efficientchemicalsensingbycoupledslotsoiwaveguides |