Using optical tweezers to simultaneously trap, charge and measure the charge of a microparticle in air
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911599589064704 |
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| author | Stoellner, Andrea Lenton, Isaac C. D. Volosniev, Artem G. Millen, James Shibuya, Renjiro Ishii, Hisao Rak, Dmytro Alpichshev, Zhanybek David, Gregory Signorell, Ruth Muller, Caroline Waitukaitis, Scott |
| author_facet | Stoellner, Andrea Lenton, Isaac C. D. Volosniev, Artem G. Millen, James Shibuya, Renjiro Ishii, Hisao Rak, Dmytro Alpichshev, Zhanybek David, Gregory Signorell, Ruth Muller, Caroline Waitukaitis, Scott |
| contents | Optical tweezers are widely used as a highly sensitive tool to measure forces on micron-scale particles. One such application is the measurement of the electric charge of a particle, which can be done with high precision in liquids, air, or vacuum. We experimentally investigate how the trapping laser itself can electrically charge such a particle, in our case a $\sim 1\,\mathrm{μm\;SiO_2}$ sphere in air. We model the charging mechanism as a two-photon process which reproduces the experimental data with high fidelity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_17591 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Using optical tweezers to simultaneously trap, charge and measure the charge of a microparticle in air Stoellner, Andrea Lenton, Isaac C. D. Volosniev, Artem G. Millen, James Shibuya, Renjiro Ishii, Hisao Rak, Dmytro Alpichshev, Zhanybek David, Gregory Signorell, Ruth Muller, Caroline Waitukaitis, Scott Soft Condensed Matter Optics Optical tweezers are widely used as a highly sensitive tool to measure forces on micron-scale particles. One such application is the measurement of the electric charge of a particle, which can be done with high precision in liquids, air, or vacuum. We experimentally investigate how the trapping laser itself can electrically charge such a particle, in our case a $\sim 1\,\mathrm{μm\;SiO_2}$ sphere in air. We model the charging mechanism as a two-photon process which reproduces the experimental data with high fidelity. |
| title | Using optical tweezers to simultaneously trap, charge and measure the charge of a microparticle in air |
| topic | Soft Condensed Matter Optics |
| url | https://arxiv.org/abs/2507.17591 |