Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diode
Abstract Far-UVC light in the wavelength range of 200–230 nm has attracted renewed interest because of its safety for human exposure and effectiveness in inactivating pathogens. Here we present a compact solid-state far-UVC laser source based on second-harmonic generation (SHG) using a low-cost comm...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-02-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-53144-7 |
| _version_ | 1797274861351993344 |
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| author | Eric J. Stanton Peter Tønning Emil Z. Ulsig Stig Calmar Maiya A. Stanton Simon T. Thomsen Kevin B. Gravesen Peter Johansen Nicolas Volet |
| author_facet | Eric J. Stanton Peter Tønning Emil Z. Ulsig Stig Calmar Maiya A. Stanton Simon T. Thomsen Kevin B. Gravesen Peter Johansen Nicolas Volet |
| author_sort | Eric J. Stanton |
| collection | DOAJ |
| description | Abstract Far-UVC light in the wavelength range of 200–230 nm has attracted renewed interest because of its safety for human exposure and effectiveness in inactivating pathogens. Here we present a compact solid-state far-UVC laser source based on second-harmonic generation (SHG) using a low-cost commercially-available blue laser diode pump. Leveraging the high intensity of light in a nanophotonic waveguide and heterogeneous integration, our approach achieves Cherenkov phase-matching across a bonded interface consisting of a silicon nitride (SiN) waveguide and a beta barium borate (BBO) nonlinear crystal. Through systematic investigations of waveguide dimensions and pump power, we analyze the dependencies of Cherenkov emission angle, conversion efficiency, and output power. Experimental results confirm the feasibility of generating far-UVC, paving the way for mass production in a compact form factor. This solid-state far-UVC laser source shows significant potential for applications in human-safe disinfection, non-line-of-sight free-space communication, and deep-UV Raman spectroscopy. |
| first_indexed | 2024-03-07T15:05:14Z |
| format | Article |
| id | doaj.art-5b93c9e31ff544079cefd5155b4e95d3 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-07T15:05:14Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-5b93c9e31ff544079cefd5155b4e95d32024-03-05T18:56:38ZengNature PortfolioScientific Reports2045-23222024-02-0114111110.1038/s41598-024-53144-7Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diodeEric J. Stanton0Peter Tønning1Emil Z. Ulsig2Stig Calmar3Maiya A. Stanton4Simon T. Thomsen5Kevin B. Gravesen6Peter Johansen7Nicolas Volet8EMode PhotonixUVL A/SUVL A/SUVL A/SEMode PhotonixUVL A/SUVL A/SUVL A/SUVL A/SAbstract Far-UVC light in the wavelength range of 200–230 nm has attracted renewed interest because of its safety for human exposure and effectiveness in inactivating pathogens. Here we present a compact solid-state far-UVC laser source based on second-harmonic generation (SHG) using a low-cost commercially-available blue laser diode pump. Leveraging the high intensity of light in a nanophotonic waveguide and heterogeneous integration, our approach achieves Cherenkov phase-matching across a bonded interface consisting of a silicon nitride (SiN) waveguide and a beta barium borate (BBO) nonlinear crystal. Through systematic investigations of waveguide dimensions and pump power, we analyze the dependencies of Cherenkov emission angle, conversion efficiency, and output power. Experimental results confirm the feasibility of generating far-UVC, paving the way for mass production in a compact form factor. This solid-state far-UVC laser source shows significant potential for applications in human-safe disinfection, non-line-of-sight free-space communication, and deep-UV Raman spectroscopy.https://doi.org/10.1038/s41598-024-53144-7 |
| spellingShingle | Eric J. Stanton Peter Tønning Emil Z. Ulsig Stig Calmar Maiya A. Stanton Simon T. Thomsen Kevin B. Gravesen Peter Johansen Nicolas Volet Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diode Scientific Reports |
| title | Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diode |
| title_full | Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diode |
| title_fullStr | Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diode |
| title_full_unstemmed | Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diode |
| title_short | Continuous-wave second-harmonic generation in the far-UVC pumped by a blue laser diode |
| title_sort | continuous wave second harmonic generation in the far uvc pumped by a blue laser diode |
| url | https://doi.org/10.1038/s41598-024-53144-7 |
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