Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room Temperature
Abstract Brightening dark excitons in transition metal dichalcogenide monolayers (MLs) can provide large‐area ultrathin devices for applications in quantum information science and optoelectronics. For practical applications of dark excitons, a robust and bright emission over a wide area at room temp...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202411841 |
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| author | Hyun Jeong Hyeong Chan Suh Ga Hyun Cho Huitae Joo Yeonjeong Koo Hayoung Ko Ki Kang Kim Youngbum Kim Jeongyong Kim Kyoung‐Duck Park Mun Seok Jeong |
| author_facet | Hyun Jeong Hyeong Chan Suh Ga Hyun Cho Huitae Joo Yeonjeong Koo Hayoung Ko Ki Kang Kim Youngbum Kim Jeongyong Kim Kyoung‐Duck Park Mun Seok Jeong |
| author_sort | Hyun Jeong |
| collection | DOAJ |
| description | Abstract Brightening dark excitons in transition metal dichalcogenide monolayers (MLs) can provide large‐area ultrathin devices for applications in quantum information science and optoelectronics. For practical applications of dark excitons, a robust and bright emission over a wide area at room temperature is desirable; however, no reliable approach has been demonstrated thus far. In this study, an efficient approach is presented for brightening dark excitons at room temperature over a large area of a WSe2 ML via coupling between plasmons and dark excitons. When a WSe2 ML is placed on gold micropillars (Au MPs), dark excitons are efficiently coupled to strongly localized surface plasmons at the edges of the Au MPs, along with a strong photoluminescence (PL) emission. Room‐temperature dark exciton emission is confirmed via energy‐, angle‐, and time‐resolved spectroscopy experiments, as well as confocal PL mapping. This study provides a generalizable method for the practical application of dark exciton. |
| format | Article |
| id | doaj-art-49ca85b88317456d81aa42106f4773a4 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-49ca85b88317456d81aa42106f4773a42025-01-20T13:04:19ZengWileyAdvanced Science2198-38442025-01-01123n/an/a10.1002/advs.202411841Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room TemperatureHyun Jeong0Hyeong Chan Suh1Ga Hyun Cho2Huitae Joo3Yeonjeong Koo4Hayoung Ko5Ki Kang Kim6Youngbum Kim7Jeongyong Kim8Kyoung‐Duck Park9Mun Seok Jeong10Department of Physics Hanyang University Seoul 04763 Republic of KoreaDepartment of Physics Hanyang University Seoul 04763 Republic of KoreaDepartment of Physics Hanyang University Seoul 04763 Republic of KoreaDepartment of Physics Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of KoreaDepartment of Physics Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Energy Science Sungkyunkwan University Suwon 16419 Republic of KoreaDepartment of Physics Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of KoreaDepartment of Physics Hanyang University Seoul 04763 Republic of KoreaAbstract Brightening dark excitons in transition metal dichalcogenide monolayers (MLs) can provide large‐area ultrathin devices for applications in quantum information science and optoelectronics. For practical applications of dark excitons, a robust and bright emission over a wide area at room temperature is desirable; however, no reliable approach has been demonstrated thus far. In this study, an efficient approach is presented for brightening dark excitons at room temperature over a large area of a WSe2 ML via coupling between plasmons and dark excitons. When a WSe2 ML is placed on gold micropillars (Au MPs), dark excitons are efficiently coupled to strongly localized surface plasmons at the edges of the Au MPs, along with a strong photoluminescence (PL) emission. Room‐temperature dark exciton emission is confirmed via energy‐, angle‐, and time‐resolved spectroscopy experiments, as well as confocal PL mapping. This study provides a generalizable method for the practical application of dark exciton.https://doi.org/10.1002/advs.202411841dark excitonmonolayer WSe2photoluminescencestrainsurface plasmon |
| spellingShingle | Hyun Jeong Hyeong Chan Suh Ga Hyun Cho Huitae Joo Yeonjeong Koo Hayoung Ko Ki Kang Kim Youngbum Kim Jeongyong Kim Kyoung‐Duck Park Mun Seok Jeong Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room Temperature Advanced Science dark exciton monolayer WSe2 photoluminescence strain surface plasmon |
| title | Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room Temperature |
| title_full | Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room Temperature |
| title_fullStr | Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room Temperature |
| title_full_unstemmed | Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room Temperature |
| title_short | Large‐Area Bright Emission of Plasmon‐Coupled Dark Excitons at Room Temperature |
| title_sort | large area bright emission of plasmon coupled dark excitons at room temperature |
| topic | dark exciton monolayer WSe2 photoluminescence strain surface plasmon |
| url | https://doi.org/10.1002/advs.202411841 |
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