Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids
The design and modeling of a highly sensitive sensor based on a slot photonic crystal waveguide (slot-PCWG) is presented. The structure consists of cylindrical air rods drilled in a dielectric slab on a triangular lattice, which are filled with SiO<sub>2</sub>. The waveguide is formed by...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-08-01
|
| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/11/8/781 |
| _version_ | 1797557880360009728 |
|---|---|
| author | Reyhaneh Jannesari Gerald Pühringer Thomas Grille Bernhard Jakoby |
| author_facet | Reyhaneh Jannesari Gerald Pühringer Thomas Grille Bernhard Jakoby |
| author_sort | Reyhaneh Jannesari |
| collection | DOAJ |
| description | The design and modeling of a highly sensitive sensor based on a slot photonic crystal waveguide (slot-PCWG) is presented. The structure consists of cylindrical air rods drilled in a dielectric slab on a triangular lattice, which are filled with SiO<sub>2</sub>. The waveguide is formed by removing elements from the regular photonic crystal grid in a row, and embedding a slot in the center position. This concept allows for a vast enhancement of the evanescent field ratio, leading to a strong overlap between the field of the waveguide mode and the analyte. In the present work, we show that the sensitivity at the constant slab thickness of the slot-PCWG modes is greatly enhanced, up to a factor of 7.6 compared with the corresponding PCWG modes or Si-slab WGs. The finite-difference time-domain (FDTD) technique and plane wave expansion (PWE) methods were used to study the dispersion and profile of the PCWG mode. The simulation results show the potential of this design, which will be fabricated and tested in the following steps of the project. |
| first_indexed | 2024-03-10T17:23:30Z |
| format | Article |
| id | doaj.art-8b5b36e782d44119a18f0092d307f40e |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T17:23:30Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-8b5b36e782d44119a18f0092d307f40e2023-11-20T10:16:29ZengMDPI AGMicromachines2072-666X2020-08-0111878110.3390/mi11080781Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in FluidsReyhaneh Jannesari0Gerald Pühringer1Thomas Grille2Bernhard Jakoby3Institute for Microelectronics and Microsensors, Johannes Kepler University, 4040 Linz, AustriaInstitute for Microelectronics and Microsensors, Johannes Kepler University, 4040 Linz, AustriaInfineon Technologies Austria AG, 9500 Villach, AustriaInstitute for Microelectronics and Microsensors, Johannes Kepler University, 4040 Linz, AustriaThe design and modeling of a highly sensitive sensor based on a slot photonic crystal waveguide (slot-PCWG) is presented. The structure consists of cylindrical air rods drilled in a dielectric slab on a triangular lattice, which are filled with SiO<sub>2</sub>. The waveguide is formed by removing elements from the regular photonic crystal grid in a row, and embedding a slot in the center position. This concept allows for a vast enhancement of the evanescent field ratio, leading to a strong overlap between the field of the waveguide mode and the analyte. In the present work, we show that the sensitivity at the constant slab thickness of the slot-PCWG modes is greatly enhanced, up to a factor of 7.6 compared with the corresponding PCWG modes or Si-slab WGs. The finite-difference time-domain (FDTD) technique and plane wave expansion (PWE) methods were used to study the dispersion and profile of the PCWG mode. The simulation results show the potential of this design, which will be fabricated and tested in the following steps of the project.https://www.mdpi.com/2072-666X/11/8/781photonic crystalslot waveguideevanescent field absorption |
| spellingShingle | Reyhaneh Jannesari Gerald Pühringer Thomas Grille Bernhard Jakoby Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids Micromachines photonic crystal slot waveguide evanescent field absorption |
| title | Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids |
| title_full | Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids |
| title_fullStr | Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids |
| title_full_unstemmed | Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids |
| title_short | Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids |
| title_sort | design and analysis of a slot photonic crystal waveguide for highly sensitive evanescent field absorption sensing in fluids |
| topic | photonic crystal slot waveguide evanescent field absorption |
| url | https://www.mdpi.com/2072-666X/11/8/781 |
| work_keys_str_mv | AT reyhanehjannesari designandanalysisofaslotphotoniccrystalwaveguideforhighlysensitiveevanescentfieldabsorptionsensinginfluids AT geraldpuhringer designandanalysisofaslotphotoniccrystalwaveguideforhighlysensitiveevanescentfieldabsorptionsensinginfluids AT thomasgrille designandanalysisofaslotphotoniccrystalwaveguideforhighlysensitiveevanescentfieldabsorptionsensinginfluids AT bernhardjakoby designandanalysisofaslotphotoniccrystalwaveguideforhighlysensitiveevanescentfieldabsorptionsensinginfluids |