Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical Frequencies
In this study, we design ultra-broadband optical absorbers, ultra-narrow optical waveguides, and ultra-small optical cavities comprising two-dimensional metallic photonic crystals that tolerate fabrication imperfections such as position and radius disorderings. The absorbers containing gold rods sho...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-06-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/12/13/2132 |
| _version_ | 1797442523865546752 |
|---|---|
| author | Kiyanoush Goudarzi Moonjoo Lee |
| author_facet | Kiyanoush Goudarzi Moonjoo Lee |
| author_sort | Kiyanoush Goudarzi |
| collection | DOAJ |
| description | In this study, we design ultra-broadband optical absorbers, ultra-narrow optical waveguides, and ultra-small optical cavities comprising two-dimensional metallic photonic crystals that tolerate fabrication imperfections such as position and radius disorderings. The absorbers containing gold rods show an absorption amplitude of more than 90% under 54% position disordering at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>200</mn><mo><</mo><mi>λ</mi><mo><</mo><mn>530</mn></mrow></semantics></math></inline-formula> nm. The absorbers containing silver rods show an absorptance of more than 90% under 54% position disordering at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>200</mn><mo><</mo><mi>λ</mi><mo><</mo><mn>400</mn></mrow></semantics></math></inline-formula> nm. B-type straight waveguides that contain four rows of silver rods exposed to air reveal normalized transmittances of 75% and 76% under 32% position and 60% radius disorderings, respectively. B-type L-shaped waveguides containing four rows of silver rods show 76% and 90% normalized transmittances under 32% position and 40% radius disorderings, respectively. B-type cavities containing two rings of silver rods reveal 70% and 80% normalized quality factors under 32% position and 60% radius disorderings, respectively. |
| first_indexed | 2024-03-09T12:43:06Z |
| format | Article |
| id | doaj.art-aedbcd9ee5df4375b40243413c12de6e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T12:43:06Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-aedbcd9ee5df4375b40243413c12de6e2023-11-30T22:15:50ZengMDPI AGNanomaterials2079-49912022-06-011213213210.3390/nano12132132Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical FrequenciesKiyanoush Goudarzi0Moonjoo Lee1Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, KoreaDepartment of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, KoreaIn this study, we design ultra-broadband optical absorbers, ultra-narrow optical waveguides, and ultra-small optical cavities comprising two-dimensional metallic photonic crystals that tolerate fabrication imperfections such as position and radius disorderings. The absorbers containing gold rods show an absorption amplitude of more than 90% under 54% position disordering at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>200</mn><mo><</mo><mi>λ</mi><mo><</mo><mn>530</mn></mrow></semantics></math></inline-formula> nm. The absorbers containing silver rods show an absorptance of more than 90% under 54% position disordering at <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>200</mn><mo><</mo><mi>λ</mi><mo><</mo><mn>400</mn></mrow></semantics></math></inline-formula> nm. B-type straight waveguides that contain four rows of silver rods exposed to air reveal normalized transmittances of 75% and 76% under 32% position and 60% radius disorderings, respectively. B-type L-shaped waveguides containing four rows of silver rods show 76% and 90% normalized transmittances under 32% position and 40% radius disorderings, respectively. B-type cavities containing two rings of silver rods reveal 70% and 80% normalized quality factors under 32% position and 60% radius disorderings, respectively.https://www.mdpi.com/2079-4991/12/13/2132metallic photonic crystalsposition disorderingradius disordering |
| spellingShingle | Kiyanoush Goudarzi Moonjoo Lee Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical Frequencies Nanomaterials metallic photonic crystals position disordering radius disordering |
| title | Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical Frequencies |
| title_full | Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical Frequencies |
| title_fullStr | Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical Frequencies |
| title_full_unstemmed | Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical Frequencies |
| title_short | Towards Perfect Ultra-Broadband Absorbers, Ultra-Narrow Waveguides, and Ultra-Small Cavities at Optical Frequencies |
| title_sort | towards perfect ultra broadband absorbers ultra narrow waveguides and ultra small cavities at optical frequencies |
| topic | metallic photonic crystals position disordering radius disordering |
| url | https://www.mdpi.com/2079-4991/12/13/2132 |
| work_keys_str_mv | AT kiyanoushgoudarzi towardsperfectultrabroadbandabsorbersultranarrowwaveguidesandultrasmallcavitiesatopticalfrequencies AT moonjoolee towardsperfectultrabroadbandabsorbersultranarrowwaveguidesandultrasmallcavitiesatopticalfrequencies |