Quantum control in size selected semiconductor quantum dot thin films
We introduce a novel technique for coherent control that employs resonant internally generated fields in CdTe quantum dot (QD) thin films at the L-point. The bulk band gap of CdTe at the L-point amounts to 3.6 eV, with the transition marked by strong Coulomb coupling. Third harmonic generation (λ 3...
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| Format: | Article |
| Language: | English |
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De Gruyter
2025-01-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2024-0529 |
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| _version_ | 1823860477890920448 |
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| author | Kärcher Victor Reiker Tobias da Costa Pedro F.G.M. de Camargo Andrea S.S. Zacharias Helmut |
| author_facet | Kärcher Victor Reiker Tobias da Costa Pedro F.G.M. de Camargo Andrea S.S. Zacharias Helmut |
| author_sort | Kärcher Victor |
| collection | DOAJ |
| description | We introduce a novel technique for coherent control that employs resonant internally generated fields in CdTe quantum dot (QD) thin films at the L-point. The bulk band gap of CdTe at the L-point amounts to 3.6 eV, with the transition marked by strong Coulomb coupling. Third harmonic generation (λ
3 = 343 nm, hν = 3.61 eV) for a fundamental wavelength of λ
1 = 1,030 nm is used to control quantum interference of three-photon resonant paths between the valence and conduction bands. Different thicknesses of the CdTe QDs are used to manipulate the phase relationship between the external fundamental and the internally generated third harmonic, resulting in either suppression or strong enhancement of the resonant third harmonic, while the nonresonant components remain nearly constant. This development could pave the way for new quantum interference–based applications in ultrafast switching of nanophotonic devices. |
| format | Article |
| id | doaj-art-194f2e4d0d0b4f518a28c92f1b3a6ae5 |
| institution | Kabale University |
| issn | 2192-8614 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-194f2e4d0d0b4f518a28c92f1b3a6ae52025-02-10T13:24:47ZengDe GruyterNanophotonics2192-86142025-01-0114222923910.1515/nanoph-2024-0529Quantum control in size selected semiconductor quantum dot thin filmsKärcher Victor0Reiker Tobias1da Costa Pedro F.G.M.2de Camargo Andrea S.S.3Zacharias Helmut4Center for Soft Nanoscience, University of Münster, 48149Münster, GermanyCenter for Soft Nanoscience, University of Münster, 48149Münster, GermanySão Carlos Institute of Physics, University of São Paulo, São Carlos, SP13566-590, BrazilFederal Institute for Materials Research and Testing (BAM), 12489Berlin, GermanyCenter for Soft Nanoscience, University of Münster, 48149Münster, GermanyWe introduce a novel technique for coherent control that employs resonant internally generated fields in CdTe quantum dot (QD) thin films at the L-point. The bulk band gap of CdTe at the L-point amounts to 3.6 eV, with the transition marked by strong Coulomb coupling. Third harmonic generation (λ 3 = 343 nm, hν = 3.61 eV) for a fundamental wavelength of λ 1 = 1,030 nm is used to control quantum interference of three-photon resonant paths between the valence and conduction bands. Different thicknesses of the CdTe QDs are used to manipulate the phase relationship between the external fundamental and the internally generated third harmonic, resulting in either suppression or strong enhancement of the resonant third harmonic, while the nonresonant components remain nearly constant. This development could pave the way for new quantum interference–based applications in ultrafast switching of nanophotonic devices.https://doi.org/10.1515/nanoph-2024-0529nonlinear nanophotonicsquantum interferencethird harmoniccoherent controlthin filmsquantum dots |
| spellingShingle | Kärcher Victor Reiker Tobias da Costa Pedro F.G.M. de Camargo Andrea S.S. Zacharias Helmut Quantum control in size selected semiconductor quantum dot thin films Nanophotonics nonlinear nanophotonics quantum interference third harmonic coherent control thin films quantum dots |
| title | Quantum control in size selected semiconductor quantum dot thin films |
| title_full | Quantum control in size selected semiconductor quantum dot thin films |
| title_fullStr | Quantum control in size selected semiconductor quantum dot thin films |
| title_full_unstemmed | Quantum control in size selected semiconductor quantum dot thin films |
| title_short | Quantum control in size selected semiconductor quantum dot thin films |
| title_sort | quantum control in size selected semiconductor quantum dot thin films |
| topic | nonlinear nanophotonics quantum interference third harmonic coherent control thin films quantum dots |
| url | https://doi.org/10.1515/nanoph-2024-0529 |
| work_keys_str_mv | AT karchervictor quantumcontrolinsizeselectedsemiconductorquantumdotthinfilms AT reikertobias quantumcontrolinsizeselectedsemiconductorquantumdotthinfilms AT dacostapedrofgm quantumcontrolinsizeselectedsemiconductorquantumdotthinfilms AT decamargoandreass quantumcontrolinsizeselectedsemiconductorquantumdotthinfilms AT zachariashelmut quantumcontrolinsizeselectedsemiconductorquantumdotthinfilms |