Design and simulation of mid-infrared photodetectors
Mid-wavelength infrared (MWIR) photodetectors with highest sensitivity wavelength at spectral windows of 3-5 μm have garnered significant attention due to the largest atmospheric transmission in this range. Conventional photodetectors performing in this wavelength range are predominantly focused on...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2020
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| Online Access: | https://hdl.handle.net/10356/139400 |
| _version_ | 1811688826972667904 |
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| author | Lim, Joo Kai |
| author2 | ZHANG Dao Hua |
| author_facet | ZHANG Dao Hua Lim, Joo Kai |
| author_sort | Lim, Joo Kai |
| collection | NTU |
| description | Mid-wavelength infrared (MWIR) photodetectors with highest sensitivity wavelength at spectral windows of 3-5 μm have garnered significant attention due to the largest atmospheric transmission in this range. Conventional photodetectors performing in this wavelength range are predominantly focused on materials such as PbSnTe, InSb and HgCdTe. These materials have troubles in reproducible development of uniform composition of epitaxial layers and bulk crystals. It also requires a low-temperature condition that contributes to the creation of alternative material systems, such as InAsSb and InAs / GaSb type-II superlattice (SL) related material systems. A study to optimize surface plasmon polariton (SPP) was proposed in recent years to enhance the performance of photodetectors. By positioning a plasmonic structure with a strong light-focusing capability on the sub-wavelength regime, tight spatial confinement, near to a detector's absorption area and high local field-intensity of surface plasmons. Light-matter interaction can be enhanced. Hence, light detection performance increased. In this project, I utilized plasmonic enhancement technique without compromising response speed to enhance sensitivity. I have designed various metallic patch structures to foster the performance of InAs 0.91 Sb 0.09 -based heterojunction n-i-p photodiode. Utilizing finite-difference time-domain software (FDTD Solutions, Lumerical Inc), following simulation results indicate that using a metallic patch structures can certainly excite the obvious resonance within MWIR range. Hence, they can greatly enhance the electrical field, resulting in improved detection performance. The attribute enables the MWIR detector to function well under room temperature. |
| first_indexed | 2024-10-01T05:38:23Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/139400 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:38:23Z |
| publishDate | 2020 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1394002023-07-07T18:54:01Z Design and simulation of mid-infrared photodetectors Lim, Joo Kai ZHANG Dao Hua School of Electrical and Electronic Engineering edhzhang@ntu.edu.sg Engineering::Electrical and electronic engineering Mid-wavelength infrared (MWIR) photodetectors with highest sensitivity wavelength at spectral windows of 3-5 μm have garnered significant attention due to the largest atmospheric transmission in this range. Conventional photodetectors performing in this wavelength range are predominantly focused on materials such as PbSnTe, InSb and HgCdTe. These materials have troubles in reproducible development of uniform composition of epitaxial layers and bulk crystals. It also requires a low-temperature condition that contributes to the creation of alternative material systems, such as InAsSb and InAs / GaSb type-II superlattice (SL) related material systems. A study to optimize surface plasmon polariton (SPP) was proposed in recent years to enhance the performance of photodetectors. By positioning a plasmonic structure with a strong light-focusing capability on the sub-wavelength regime, tight spatial confinement, near to a detector's absorption area and high local field-intensity of surface plasmons. Light-matter interaction can be enhanced. Hence, light detection performance increased. In this project, I utilized plasmonic enhancement technique without compromising response speed to enhance sensitivity. I have designed various metallic patch structures to foster the performance of InAs 0.91 Sb 0.09 -based heterojunction n-i-p photodiode. Utilizing finite-difference time-domain software (FDTD Solutions, Lumerical Inc), following simulation results indicate that using a metallic patch structures can certainly excite the obvious resonance within MWIR range. Hence, they can greatly enhance the electrical field, resulting in improved detection performance. The attribute enables the MWIR detector to function well under room temperature. Bachelor of Engineering (Electrical and Electronic Engineering) 2020-05-19T06:27:35Z 2020-05-19T06:27:35Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/139400 en A2256-191 application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Electrical and electronic engineering Lim, Joo Kai Design and simulation of mid-infrared photodetectors |
| title | Design and simulation of mid-infrared photodetectors |
| title_full | Design and simulation of mid-infrared photodetectors |
| title_fullStr | Design and simulation of mid-infrared photodetectors |
| title_full_unstemmed | Design and simulation of mid-infrared photodetectors |
| title_short | Design and simulation of mid-infrared photodetectors |
| title_sort | design and simulation of mid infrared photodetectors |
| topic | Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/139400 |
| work_keys_str_mv | AT limjookai designandsimulationofmidinfraredphotodetectors |