Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality Sensors
Designing various nanostructures to achieve narrowband light reflection resonances is desirable for optical sensing applications. In this work, we theoretically demonstrate two narrowband light reflection resonances resulting from the excitations of the zero-order transverse magnetic (TM) and transv...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/10/1966 |
| _version_ | 1797551842828222464 |
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| author | Ping Gu Jing Chen Chun Yang Zhendong Yan Chaojun Tang Pinggen Cai Fan Gao Bo Yan Zhengqi Liu Zhong Huang |
| author_facet | Ping Gu Jing Chen Chun Yang Zhendong Yan Chaojun Tang Pinggen Cai Fan Gao Bo Yan Zhengqi Liu Zhong Huang |
| author_sort | Ping Gu |
| collection | DOAJ |
| description | Designing various nanostructures to achieve narrowband light reflection resonances is desirable for optical sensing applications. In this work, we theoretically demonstrate two narrowband light reflection resonances resulting from the excitations of the zero-order transverse magnetic (TM) and transverse electric (TE) waveguide modes, in a waveguide structure consisting of an Au sphere array on an indium tin oxide (ITO) spacer on a silica (SiO<sub>2</sub>) substrate. The positions of the light reflection resonances can be tuned easily, by varying the array periods of gold (Au) spheres or by changing the thickness of the ITO film. More importantly, the light reflection resonances have a very narrow bandwidth, the full width at half maximum (FWHM) of which can be reduced to only several nanometers for the zero-order TM and TE waveguide modes. The conventionally defined performance parameters of sensors, sensitivity (S) and figure of merit (FOM), have quite high values of about 80 nm/RIU and 32, respectively, in the visible wavelength range. |
| first_indexed | 2024-03-10T15:50:48Z |
| format | Article |
| id | doaj.art-86e77540033643aca66419f40d89aa9e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T15:50:48Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-86e77540033643aca66419f40d89aa9e2023-11-20T16:01:38ZengMDPI AGNanomaterials2079-49912020-10-011010196610.3390/nano10101966Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality SensorsPing Gu0Jing Chen1Chun Yang2Zhendong Yan3Chaojun Tang4Pinggen Cai5Fan Gao6Bo Yan7Zhengqi Liu8Zhong Huang9College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaCollege of Science, Nanjing Forestry University, Nanjing 210037, ChinaCenter for Optics and Optoelectronics Research, Collaborative Innovation Center for Information Technology in Biological and Medical Physics, College of Science, Zhejiang University of Technology, Hangzhou 310023, ChinaCenter for Optics and Optoelectronics Research, Collaborative Innovation Center for Information Technology in Biological and Medical Physics, College of Science, Zhejiang University of Technology, Hangzhou 310023, ChinaCenter for Optics and Optoelectronics Research, Collaborative Innovation Center for Information Technology in Biological and Medical Physics, College of Science, Zhejiang University of Technology, Hangzhou 310023, ChinaCenter for Optics and Optoelectronics Research, Collaborative Innovation Center for Information Technology in Biological and Medical Physics, College of Science, Zhejiang University of Technology, Hangzhou 310023, ChinaCollege of Physics Communication and Electronics, Jiangxi Normal University, Nanchang 330022, ChinaCollege of Physics and Electronic Engineering, Jiangsu Second Normal University, Nanjing 210013, ChinaDesigning various nanostructures to achieve narrowband light reflection resonances is desirable for optical sensing applications. In this work, we theoretically demonstrate two narrowband light reflection resonances resulting from the excitations of the zero-order transverse magnetic (TM) and transverse electric (TE) waveguide modes, in a waveguide structure consisting of an Au sphere array on an indium tin oxide (ITO) spacer on a silica (SiO<sub>2</sub>) substrate. The positions of the light reflection resonances can be tuned easily, by varying the array periods of gold (Au) spheres or by changing the thickness of the ITO film. More importantly, the light reflection resonances have a very narrow bandwidth, the full width at half maximum (FWHM) of which can be reduced to only several nanometers for the zero-order TM and TE waveguide modes. The conventionally defined performance parameters of sensors, sensitivity (S) and figure of merit (FOM), have quite high values of about 80 nm/RIU and 32, respectively, in the visible wavelength range.https://www.mdpi.com/2079-4991/10/10/1966reflection resonancesnarrow bandwaveguide modessensors |
| spellingShingle | Ping Gu Jing Chen Chun Yang Zhendong Yan Chaojun Tang Pinggen Cai Fan Gao Bo Yan Zhengqi Liu Zhong Huang Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality Sensors Nanomaterials reflection resonances narrow band waveguide modes sensors |
| title | Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality Sensors |
| title_full | Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality Sensors |
| title_fullStr | Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality Sensors |
| title_full_unstemmed | Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality Sensors |
| title_short | Narrowband Light Reflection Resonances from Waveguide Modes for High-Quality Sensors |
| title_sort | narrowband light reflection resonances from waveguide modes for high quality sensors |
| topic | reflection resonances narrow band waveguide modes sensors |
| url | https://www.mdpi.com/2079-4991/10/10/1966 |
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