Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyond
We propose the generation of attosecond entangled biphotons in the extreme-ultraviolet regime by two-photon decay of a metastable atomic state as a source similar to spontaneous parametric down-conversion photons. The 1s2s ^{1}S_{0} metastable state in helium decays to the ground state by the emissi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2022-09-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.L032038 |
| _version_ | 1797210659836919808 |
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| author | Yimeng Wang Siddhant Pandey Chris H. Greene Niranjan Shivaram |
| author_facet | Yimeng Wang Siddhant Pandey Chris H. Greene Niranjan Shivaram |
| author_sort | Yimeng Wang |
| collection | DOAJ |
| description | We propose the generation of attosecond entangled biphotons in the extreme-ultraviolet regime by two-photon decay of a metastable atomic state as a source similar to spontaneous parametric down-conversion photons. The 1s2s ^{1}S_{0} metastable state in helium decays to the ground state by the emission of two energy-time entangled photons with a photon bandwidth equal to the total energy spacing of 20.62 eV. This results in a pair correlation time in the attosecond regime making these entangled photons a highly suitable source for attosecond pump-probe experiments. The biphoton generation rate from a direct four-photon excitation of helium at 240 nm is calculated and used to assess some feasible schemes to generate these biphotons. Possible applications of entangled biphotons in attosecond timescale experiments, and a discussion of their potential to reach the zeptosecond regime are presented. |
| first_indexed | 2024-04-24T10:14:07Z |
| format | Article |
| id | doaj.art-939c70b63a5b47fb91ba3ace2d390775 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:14:07Z |
| publishDate | 2022-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-939c70b63a5b47fb91ba3ace2d3907752024-04-12T17:24:19ZengAmerican Physical SocietyPhysical Review Research2643-15642022-09-0143L03203810.1103/PhysRevResearch.4.L032038Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyondYimeng WangSiddhant PandeyChris H. GreeneNiranjan ShivaramWe propose the generation of attosecond entangled biphotons in the extreme-ultraviolet regime by two-photon decay of a metastable atomic state as a source similar to spontaneous parametric down-conversion photons. The 1s2s ^{1}S_{0} metastable state in helium decays to the ground state by the emission of two energy-time entangled photons with a photon bandwidth equal to the total energy spacing of 20.62 eV. This results in a pair correlation time in the attosecond regime making these entangled photons a highly suitable source for attosecond pump-probe experiments. The biphoton generation rate from a direct four-photon excitation of helium at 240 nm is calculated and used to assess some feasible schemes to generate these biphotons. Possible applications of entangled biphotons in attosecond timescale experiments, and a discussion of their potential to reach the zeptosecond regime are presented.http://doi.org/10.1103/PhysRevResearch.4.L032038 |
| spellingShingle | Yimeng Wang Siddhant Pandey Chris H. Greene Niranjan Shivaram Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyond Physical Review Research |
| title | Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyond |
| title_full | Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyond |
| title_fullStr | Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyond |
| title_full_unstemmed | Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyond |
| title_short | Attosecond entangled photons from two-photon decay of metastable atoms: A source for attosecond experiments and beyond |
| title_sort | attosecond entangled photons from two photon decay of metastable atoms a source for attosecond experiments and beyond |
| url | http://doi.org/10.1103/PhysRevResearch.4.L032038 |
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