Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal Structure
A new tunable plasmonic biosensor is proposed by embedding liquid crystals in the slit region of a corrugated plasmonic nanoslit array. The absorption spectrum of the structure and, thus, the sensing wavelength can be controlled by applying voltage to the electrode parts of the device. The interacti...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IEEE
2015-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7056451/ |
| _version_ | 1819162838254485504 |
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| author | Davod Ahmadian Changiz Ghobadi Javad Nourinia |
| author_facet | Davod Ahmadian Changiz Ghobadi Javad Nourinia |
| author_sort | Davod Ahmadian |
| collection | DOAJ |
| description | A new tunable plasmonic biosensor is proposed by embedding liquid crystals in the slit region of a corrugated plasmonic nanoslit array. The absorption spectrum of the structure and, thus, the sensing wavelength can be controlled by applying voltage to the electrode parts of the device. The interaction between the waveguide mode inside the slit and the surface plasmon polaritons on the corrugation surface can be modified using the electrooptical effect of the liquid crystals. Our numerical simulations with the finite-difference time-domain (FDTD) method reveal a large tuning of the absorption spectrum up to 100 nm. In addition to the tunability feature, the structure has a high sensitivity of 570 nm/RIU. The sensing performance of the device is evaluated by performing homogeneous biochemical sensing simulations. The special feature of the proposed structure gives it an opportunity to be used as an efficient element in integrated photonics circuits for miniaturization and tuning purposes. |
| first_indexed | 2024-12-22T17:34:36Z |
| format | Article |
| id | doaj.art-46eaf1146bdf448f880274200d0bf4ec |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-22T17:34:36Z |
| publishDate | 2015-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-46eaf1146bdf448f880274200d0bf4ec2022-12-21T18:18:32ZengIEEEIEEE Photonics Journal1943-06552015-01-017211010.1109/JPHOT.2015.24112147056451Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal StructureDavod Ahmadian0Changiz Ghobadi1Javad Nourinia2Dept. of Electr. Eng., Urmia Univ., Urmia, IranDept. of Electr. Eng., Urmia Univ., Urmia, IranDept. of Electr. Eng., Urmia Univ., Urmia, IranA new tunable plasmonic biosensor is proposed by embedding liquid crystals in the slit region of a corrugated plasmonic nanoslit array. The absorption spectrum of the structure and, thus, the sensing wavelength can be controlled by applying voltage to the electrode parts of the device. The interaction between the waveguide mode inside the slit and the surface plasmon polaritons on the corrugation surface can be modified using the electrooptical effect of the liquid crystals. Our numerical simulations with the finite-difference time-domain (FDTD) method reveal a large tuning of the absorption spectrum up to 100 nm. In addition to the tunability feature, the structure has a high sensitivity of 570 nm/RIU. The sensing performance of the device is evaluated by performing homogeneous biochemical sensing simulations. The special feature of the proposed structure gives it an opportunity to be used as an efficient element in integrated photonics circuits for miniaturization and tuning purposes.https://ieeexplore.ieee.org/document/7056451/Surface plasmon polaritonliquid crystaltunable sensorM-LC-MFDTD |
| spellingShingle | Davod Ahmadian Changiz Ghobadi Javad Nourinia Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal Structure IEEE Photonics Journal Surface plasmon polariton liquid crystal tunable sensor M-LC-M FDTD |
| title | Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal Structure |
| title_full | Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal Structure |
| title_fullStr | Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal Structure |
| title_full_unstemmed | Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal Structure |
| title_short | Tunable Plasmonic Sensor With Metal–Liquid Crystal–Metal Structure |
| title_sort | tunable plasmonic sensor with metal x2013 liquid crystal x2013 metal structure |
| topic | Surface plasmon polariton liquid crystal tunable sensor M-LC-M FDTD |
| url | https://ieeexplore.ieee.org/document/7056451/ |
| work_keys_str_mv | AT davodahmadian tunableplasmonicsensorwithmetalx2013liquidcrystalx2013metalstructure AT changizghobadi tunableplasmonicsensorwithmetalx2013liquidcrystalx2013metalstructure AT javadnourinia tunableplasmonicsensorwithmetalx2013liquidcrystalx2013metalstructure |