Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes
Semiconductor nanowire arrays have been demonstrated as promising candidates for nanoscale optoelectronics applications due to their high detectivity as well as tunable photoresponse and bandgap over a wide spectral range. In the infrared (IR), where these attributes are more difficult to obtain, na...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/16/5420 |
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| author | Simeon Trendafilov Jeffery W. Allen Monica S. Allen Sukrith U. Dev Ziyuan Li Lan Fu Chennupati Jagadish |
| author_facet | Simeon Trendafilov Jeffery W. Allen Monica S. Allen Sukrith U. Dev Ziyuan Li Lan Fu Chennupati Jagadish |
| author_sort | Simeon Trendafilov |
| collection | DOAJ |
| description | Semiconductor nanowire arrays have been demonstrated as promising candidates for nanoscale optoelectronics applications due to their high detectivity as well as tunable photoresponse and bandgap over a wide spectral range. In the infrared (IR), where these attributes are more difficult to obtain, nanowires will play a major role in developing practical devices for detection, imaging and energy harvesting. Due to their geometry and periodic nature, vertical nanowire and nanopillar devices naturally lend themselves to waveguide and photonic crystal mode engineering leading to multifunctional materials and devices. In this paper, we computationally develop theoretical basis to enable better understanding of the fundamental electromagnetics, modes and couplings that govern these structures. Tuning the photonic response of a nanowire array is contingent on manipulating electromagnetic power flow through the lossy nanowires, which requires an intimate knowledge of the photonic crystal modes responsible for the power flow. Prior published work on establishing the fundamental physical modes involved has been based either on the modes of individual nanowires or numerically computed modes of 2D photonic crystals. We show that a unified description of the array key electromagnetic modes and their behavior is obtainable by taking into account modal interactions that are governed by the physics of exceptional points. Such models that describe the underlying physics of the photoresponse of nanowire arrays will facilitate the design and optimization of ensembles with requisite performance. Since nanowire arrays represent photonic crystal slabs, the essence of our results is applicable to arbitrary lossy photonic crystals in any frequency range. |
| first_indexed | 2024-03-10T08:24:17Z |
| format | Article |
| id | doaj.art-40954426dbc646db8bd9d3bae2e6d6d6 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T08:24:17Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-40954426dbc646db8bd9d3bae2e6d6d62023-11-22T09:39:28ZengMDPI AGSensors1424-82202021-08-012116542010.3390/s21165420Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter ModesSimeon Trendafilov0Jeffery W. Allen1Monica S. Allen2Sukrith U. Dev3Ziyuan Li4Lan Fu5Chennupati Jagadish6Air Force Research Laboratory, Munitions Directorate, Eglin AFB, Valparaiso, FL 32542, USAAir Force Research Laboratory, Munitions Directorate, Eglin AFB, Valparaiso, FL 32542, USAAir Force Research Laboratory, Munitions Directorate, Eglin AFB, Valparaiso, FL 32542, USAAir Force Research Laboratory, Munitions Directorate, Eglin AFB, Valparaiso, FL 32542, USADepartment of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 2601, AustraliaSemiconductor nanowire arrays have been demonstrated as promising candidates for nanoscale optoelectronics applications due to their high detectivity as well as tunable photoresponse and bandgap over a wide spectral range. In the infrared (IR), where these attributes are more difficult to obtain, nanowires will play a major role in developing practical devices for detection, imaging and energy harvesting. Due to their geometry and periodic nature, vertical nanowire and nanopillar devices naturally lend themselves to waveguide and photonic crystal mode engineering leading to multifunctional materials and devices. In this paper, we computationally develop theoretical basis to enable better understanding of the fundamental electromagnetics, modes and couplings that govern these structures. Tuning the photonic response of a nanowire array is contingent on manipulating electromagnetic power flow through the lossy nanowires, which requires an intimate knowledge of the photonic crystal modes responsible for the power flow. Prior published work on establishing the fundamental physical modes involved has been based either on the modes of individual nanowires or numerically computed modes of 2D photonic crystals. We show that a unified description of the array key electromagnetic modes and their behavior is obtainable by taking into account modal interactions that are governed by the physics of exceptional points. Such models that describe the underlying physics of the photoresponse of nanowire arrays will facilitate the design and optimization of ensembles with requisite performance. Since nanowire arrays represent photonic crystal slabs, the essence of our results is applicable to arbitrary lossy photonic crystals in any frequency range.https://www.mdpi.com/1424-8220/21/16/5420nanowire arrayphotonic crystal slabexceptional pointinfrared sensors |
| spellingShingle | Simeon Trendafilov Jeffery W. Allen Monica S. Allen Sukrith U. Dev Ziyuan Li Lan Fu Chennupati Jagadish Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes Sensors nanowire array photonic crystal slab exceptional point infrared sensors |
| title | Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes |
| title_full | Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes |
| title_fullStr | Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes |
| title_full_unstemmed | Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes |
| title_short | Light Absorption in Nanowire Photonic Crystal Slabs and the Physics of Exceptional Points: The Shape Shifter Modes |
| title_sort | light absorption in nanowire photonic crystal slabs and the physics of exceptional points the shape shifter modes |
| topic | nanowire array photonic crystal slab exceptional point infrared sensors |
| url | https://www.mdpi.com/1424-8220/21/16/5420 |
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