Imaging inspired characterization of single photons carrying orbital angular momentum
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2021
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| _version_ | 1866910492387180544 |
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| author | Kumar, Vimlesh Sharma, Varun Singh, Sandeep Kumar, S. Chaitanya Forbes, Andrew Ebrahim-Zadeh, M. Samanta, G. K. |
| author_facet | Kumar, Vimlesh Sharma, Varun Singh, Sandeep Kumar, S. Chaitanya Forbes, Andrew Ebrahim-Zadeh, M. Samanta, G. K. |
| contents | We report on an imaging-inspired measurement of orbital angular momentum (OAM) using only a simple tilted lens and an Intensified Charged Coupled Device (ICCD) camera, allowing us to monitor the propagation of OAM structured photons over distance, crucial for free-space quantum communication networks. We demonstrate measurement of OAM orders as high as 14 in a heralded single-photon source (HSPS) and show, for the first time, the imaged self-interference of photons carrying OAM in a modified Mach-Zehnder Interferometer (MZI). The described methods reveal both the charge and order of a photons OAM, and provide a proof of concept for the interference of a single OAM photon with itself. Using these tools, we are able to study the propagation characteristics of OAM photons over distance, important for estimating transport in free-space quantum links. By translating these classical tools into the quantum domain, we offer a robust and direct approach for the complete characterization of a twisted single-photon source, an important building block of a quantum network. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2111_08402 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Imaging inspired characterization of single photons carrying orbital angular momentum Kumar, Vimlesh Sharma, Varun Singh, Sandeep Kumar, S. Chaitanya Forbes, Andrew Ebrahim-Zadeh, M. Samanta, G. K. Quantum Physics Optics We report on an imaging-inspired measurement of orbital angular momentum (OAM) using only a simple tilted lens and an Intensified Charged Coupled Device (ICCD) camera, allowing us to monitor the propagation of OAM structured photons over distance, crucial for free-space quantum communication networks. We demonstrate measurement of OAM orders as high as 14 in a heralded single-photon source (HSPS) and show, for the first time, the imaged self-interference of photons carrying OAM in a modified Mach-Zehnder Interferometer (MZI). The described methods reveal both the charge and order of a photons OAM, and provide a proof of concept for the interference of a single OAM photon with itself. Using these tools, we are able to study the propagation characteristics of OAM photons over distance, important for estimating transport in free-space quantum links. By translating these classical tools into the quantum domain, we offer a robust and direct approach for the complete characterization of a twisted single-photon source, an important building block of a quantum network. |
| title | Imaging inspired characterization of single photons carrying orbital angular momentum |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2111.08402 |