Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum
Twist phase is a nontrivial second-order phase that only exists in a partially coherent beam. Such twist phase endows the partially coherent beam with orbital angular momentum (OAM) and has unique applications such as in super-resolution imaging. However, the manipulation and the detection of the tw...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2021-09-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2021-0432 |
| _version_ | 1797947999319490560 |
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| author | Wang Haiyun Peng Xiaofeng Zhang Hao Liu Lin Chen Yahong Wang Fei Cai Yangjian |
| author_facet | Wang Haiyun Peng Xiaofeng Zhang Hao Liu Lin Chen Yahong Wang Fei Cai Yangjian |
| author_sort | Wang Haiyun |
| collection | DOAJ |
| description | Twist phase is a nontrivial second-order phase that only exists in a partially coherent beam. Such twist phase endows the partially coherent beam with orbital angular momentum (OAM) and has unique applications such as in super-resolution imaging. However, the manipulation and the detection of the twist phase are still far from easy tasks in experiment. In this work, we present a flexible approach to generate a famous class of twisted Gaussian Schell-model (TGSM) beam with controllable twist phase by the superposition of the complex field realizations using a single phase-only spatial light modulator. The precise control of the amplitude and phase of the field realizations allows one to manipulate the strength of the twist phase easily. In addition, we show that the twist factor, a key factor that determines the strength of twist phase and the amount of OAM, can be measured by extracting the real part of the complex degree of coherence of the TGSM beam. The experiment is carried out with the help of the generalized Hanbury Brown and Twiss experiment as the generated TGSM beam obeys Gaussian statistics. The flexible control and detection of the twist phase are expected to find applications in coherence and OAM-based ghost imaging. |
| first_indexed | 2024-04-10T21:35:28Z |
| format | Article |
| id | doaj.art-f3b48187c9f1409fa6fa5d406bc65330 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-04-10T21:35:28Z |
| publishDate | 2021-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-f3b48187c9f1409fa6fa5d406bc653302023-01-19T12:46:58ZengDe GruyterNanophotonics2192-86142021-09-0111468969610.1515/nanoph-2021-0432Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentumWang Haiyun0Peng Xiaofeng1Zhang Hao2Liu Lin3Chen Yahong4Wang Fei5Cai Yangjian6School of Physical Science and Technology, Soochow University, Suzhou215006, ChinaSchool of Physics and Electronics, Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Devices, Shandong Normal University, Jinan250014, ChinaSchool of Physical Science and Technology, Soochow University, Suzhou215006, ChinaSchool of Physical Science and Technology, Soochow University, Suzhou215006, ChinaSchool of Physical Science and Technology, Soochow University, Suzhou215006, ChinaSchool of Physical Science and Technology, Soochow University, Suzhou215006, ChinaSchool of Physical Science and Technology, Soochow University, Suzhou215006, ChinaTwist phase is a nontrivial second-order phase that only exists in a partially coherent beam. Such twist phase endows the partially coherent beam with orbital angular momentum (OAM) and has unique applications such as in super-resolution imaging. However, the manipulation and the detection of the twist phase are still far from easy tasks in experiment. In this work, we present a flexible approach to generate a famous class of twisted Gaussian Schell-model (TGSM) beam with controllable twist phase by the superposition of the complex field realizations using a single phase-only spatial light modulator. The precise control of the amplitude and phase of the field realizations allows one to manipulate the strength of the twist phase easily. In addition, we show that the twist factor, a key factor that determines the strength of twist phase and the amount of OAM, can be measured by extracting the real part of the complex degree of coherence of the TGSM beam. The experiment is carried out with the help of the generalized Hanbury Brown and Twiss experiment as the generated TGSM beam obeys Gaussian statistics. The flexible control and detection of the twist phase are expected to find applications in coherence and OAM-based ghost imaging.https://doi.org/10.1515/nanoph-2021-0432optical coherenceorbital angular momentumpartially coherent beamtwist phase |
| spellingShingle | Wang Haiyun Peng Xiaofeng Zhang Hao Liu Lin Chen Yahong Wang Fei Cai Yangjian Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum Nanophotonics optical coherence orbital angular momentum partially coherent beam twist phase |
| title | Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum |
| title_full | Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum |
| title_fullStr | Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum |
| title_full_unstemmed | Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum |
| title_short | Experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum |
| title_sort | experimental synthesis of partially coherent beam with controllable twist phase and measuring its orbital angular momentum |
| topic | optical coherence orbital angular momentum partially coherent beam twist phase |
| url | https://doi.org/10.1515/nanoph-2021-0432 |
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