Proposal for THz lasing from a topological quantum dot
Topological quantum dots (TQDs) are 3D topological insulator (TI) nanoparticles, displaying symmetry-protected surface states with discretized energies. We present a theoretical proposal to harness these energy levels in a closed lasing scheme operating in the terahertz (THz) frequency range. In thi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2021-09-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2021-0292 |
| _version_ | 1819044951103635456 |
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| author | Rider Marie S. Giannini Vincenzo |
| author_facet | Rider Marie S. Giannini Vincenzo |
| author_sort | Rider Marie S. |
| collection | DOAJ |
| description | Topological quantum dots (TQDs) are 3D topological insulator (TI) nanoparticles, displaying symmetry-protected surface states with discretized energies. We present a theoretical proposal to harness these energy levels in a closed lasing scheme operating in the terahertz (THz) frequency range. In this scheme, a single TQD lases from its topological surface states in the THz regime when pumped with low intensity, incoherent THz frequency light. The time scales associated with the system are unusually slow, and we find that lasing occurs with a very low threshold. THz lasers are often bulky or require intricately engineered nanostructures. Topological quantum dots present a new, compact and simple platform for THz lasing. The lasing threshold is so low, we predict that the room-temperature blackbody radiation can substantially contribute to population inversion, providing a route to room-temperature THz lasing pumped via blackbody radiation. |
| first_indexed | 2024-12-21T10:20:50Z |
| format | Article |
| id | doaj.art-b8cce601bae347698ecd77185dddedc6 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-12-21T10:20:50Z |
| publishDate | 2021-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-b8cce601bae347698ecd77185dddedc62022-12-21T19:07:28ZengDe GruyterNanophotonics2192-86142021-09-0110133497350610.1515/nanoph-2021-0292Proposal for THz lasing from a topological quantum dotRider Marie S.0Giannini Vincenzo1The Blackett Laboratory, Imperial College London, SW7 2AZ, London, UKInstituto de Estructura de la Materia (IEM-CSIC), Consejo Superior de Investigaciones Científicas, Serrano 121, 28006Madrid, SpainTopological quantum dots (TQDs) are 3D topological insulator (TI) nanoparticles, displaying symmetry-protected surface states with discretized energies. We present a theoretical proposal to harness these energy levels in a closed lasing scheme operating in the terahertz (THz) frequency range. In this scheme, a single TQD lases from its topological surface states in the THz regime when pumped with low intensity, incoherent THz frequency light. The time scales associated with the system are unusually slow, and we find that lasing occurs with a very low threshold. THz lasers are often bulky or require intricately engineered nanostructures. Topological quantum dots present a new, compact and simple platform for THz lasing. The lasing threshold is so low, we predict that the room-temperature blackbody radiation can substantially contribute to population inversion, providing a route to room-temperature THz lasing pumped via blackbody radiation.https://doi.org/10.1515/nanoph-2021-0292nano-lasersnanoparticlesquantum dotsthz laserstopological insulatorstopological nanophotonics |
| spellingShingle | Rider Marie S. Giannini Vincenzo Proposal for THz lasing from a topological quantum dot Nanophotonics nano-lasers nanoparticles quantum dots thz lasers topological insulators topological nanophotonics |
| title | Proposal for THz lasing from a topological quantum dot |
| title_full | Proposal for THz lasing from a topological quantum dot |
| title_fullStr | Proposal for THz lasing from a topological quantum dot |
| title_full_unstemmed | Proposal for THz lasing from a topological quantum dot |
| title_short | Proposal for THz lasing from a topological quantum dot |
| title_sort | proposal for thz lasing from a topological quantum dot |
| topic | nano-lasers nanoparticles quantum dots thz lasers topological insulators topological nanophotonics |
| url | https://doi.org/10.1515/nanoph-2021-0292 |
| work_keys_str_mv | AT ridermaries proposalforthzlasingfromatopologicalquantumdot AT gianninivincenzo proposalforthzlasingfromatopologicalquantumdot |