A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring Resonators
We investigate a highly sensitive optical sensor based on two cascaded microring resonators exploiting the Vernier effect. The architecture consists of two microrings with a slight difference in their free spectral ranges. This allows the generation of the Vernier effect for achieving ultra-high sen...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2013-10-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/13/11/14601 |
| _version_ | 1798025739911561216 |
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| author | Daniel Pergande Martin Weiland Peter Lützow Vanessa Zamora |
| author_facet | Daniel Pergande Martin Weiland Peter Lützow Vanessa Zamora |
| author_sort | Daniel Pergande |
| collection | DOAJ |
| description | We investigate a highly sensitive optical sensor based on two cascaded microring resonators exploiting the Vernier effect. The architecture consists of two microrings with a slight difference in their free spectral ranges. This allows the generation of the Vernier effect for achieving ultra-high sensitivities. The sensor chip was fabricated using a silicon nitride platform and characterized with isopropanol/ethanol mixtures. A sensitivity of 0.95 nm/% was found for isopropanol concentrations in ethanol ranging from 0% to 10%. Furthermore, a collection of measurements was carried out using aqueous sodium chloride (NaCl) in solutions of different concentrations, confirming a high sensitivity of 10.3 nm/% and a bulk refractive index sensitivity of 6,317 nm/RIU. A limit of detection of 3.16 ´ 10−6 RIU was determined. These preliminary results show the potential features of cascaded silicon nitride microring resonators for real-time and free-label monitoring of biomolecules for a broad range of applications. |
| first_indexed | 2024-04-11T18:24:50Z |
| format | Article |
| id | doaj.art-f8e3765f336f4ed7873f04f2337aae50 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:24:50Z |
| publishDate | 2013-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f8e3765f336f4ed7873f04f2337aae502022-12-22T04:09:41ZengMDPI AGSensors1424-82202013-10-011311146011461010.3390/s131114601A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring ResonatorsDaniel PergandeMartin WeilandPeter LützowVanessa ZamoraWe investigate a highly sensitive optical sensor based on two cascaded microring resonators exploiting the Vernier effect. The architecture consists of two microrings with a slight difference in their free spectral ranges. This allows the generation of the Vernier effect for achieving ultra-high sensitivities. The sensor chip was fabricated using a silicon nitride platform and characterized with isopropanol/ethanol mixtures. A sensitivity of 0.95 nm/% was found for isopropanol concentrations in ethanol ranging from 0% to 10%. Furthermore, a collection of measurements was carried out using aqueous sodium chloride (NaCl) in solutions of different concentrations, confirming a high sensitivity of 10.3 nm/% and a bulk refractive index sensitivity of 6,317 nm/RIU. A limit of detection of 3.16 ´ 10−6 RIU was determined. These preliminary results show the potential features of cascaded silicon nitride microring resonators for real-time and free-label monitoring of biomolecules for a broad range of applications.http://www.mdpi.com/1424-8220/13/11/14601microring resonatorsrefractometric sensorsVernier effectsilicon nitrideintegrated optical devices |
| spellingShingle | Daniel Pergande Martin Weiland Peter Lützow Vanessa Zamora A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring Resonators Sensors microring resonators refractometric sensors Vernier effect silicon nitride integrated optical devices |
| title | A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring Resonators |
| title_full | A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring Resonators |
| title_fullStr | A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring Resonators |
| title_full_unstemmed | A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring Resonators |
| title_short | A Highly Sensitive Refractometric Sensor Based on Cascaded SiN Microring Resonators |
| title_sort | highly sensitive refractometric sensor based on cascaded sin microring resonators |
| topic | microring resonators refractometric sensors Vernier effect silicon nitride integrated optical devices |
| url | http://www.mdpi.com/1424-8220/13/11/14601 |
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