Tailorable Brillouin Light Scattering in Air-Slit Suspended Waveguide
Silicon-based optical waveguides exhibit high Brillouin gain, enabling the realization of Brillouin lasers directly on silicon substrates. These lasers hold significant promise for applications such as tunable-frequency laser emission, ultrafast pulse generation via mode-locking techniques, and othe...
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MDPI AG
2025-06-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/6/586 |
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| author | Yanzhao Wang Hongrun Ren Yunjie Teng |
| author_facet | Yanzhao Wang Hongrun Ren Yunjie Teng |
| author_sort | Yanzhao Wang |
| collection | DOAJ |
| description | Silicon-based optical waveguides exhibit high Brillouin gain, enabling the realization of Brillouin lasers directly on silicon substrates. These lasers hold significant promise for applications such as tunable-frequency laser emission, ultrafast pulse generation via mode-locking techniques, and other advanced photonic functionalities. However, a key challenge in silicon-based Brillouin lasers is the requirement for long waveguide lengths to achieve sufficient optical feedback and reach the lasing threshold. This study proposes a novel floating waveguide architecture designed to significantly enhance the Brillouin gain in silicon-based systems. Furthermore, we introduce a breakthrough method for achieving wide-range phonon frequency tunability, enabling precise control over stimulated Brillouin scattering (SBS) dynamics. By strategically engineering the waveguide geometry (shape and dimensions), we demonstrate a tunable SBS phonon laser, offering a versatile platform for on-chip applications. Additionally, the proposed waveguide system features adjustable operating frequencies, unlocking new opportunities for compact Brillouin devices and integrated microwave photonic signal sources. |
| format | Article |
| id | doaj-art-db302144a76e40f393deb3f8fedfb89a |
| institution | Matheson Library |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-db302144a76e40f393deb3f8fedfb89a2025-06-25T14:19:11ZengMDPI AGPhotonics2304-67322025-06-0112658610.3390/photonics12060586Tailorable Brillouin Light Scattering in Air-Slit Suspended WaveguideYanzhao Wang0Hongrun Ren1Yunjie Teng2School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSilicon-based optical waveguides exhibit high Brillouin gain, enabling the realization of Brillouin lasers directly on silicon substrates. These lasers hold significant promise for applications such as tunable-frequency laser emission, ultrafast pulse generation via mode-locking techniques, and other advanced photonic functionalities. However, a key challenge in silicon-based Brillouin lasers is the requirement for long waveguide lengths to achieve sufficient optical feedback and reach the lasing threshold. This study proposes a novel floating waveguide architecture designed to significantly enhance the Brillouin gain in silicon-based systems. Furthermore, we introduce a breakthrough method for achieving wide-range phonon frequency tunability, enabling precise control over stimulated Brillouin scattering (SBS) dynamics. By strategically engineering the waveguide geometry (shape and dimensions), we demonstrate a tunable SBS phonon laser, offering a versatile platform for on-chip applications. Additionally, the proposed waveguide system features adjustable operating frequencies, unlocking new opportunities for compact Brillouin devices and integrated microwave photonic signal sources.https://www.mdpi.com/2304-6732/12/6/586floating waveguide structureBrillouin gainphonon frequency tunabilitytunable SBS phonon laser |
| spellingShingle | Yanzhao Wang Hongrun Ren Yunjie Teng Tailorable Brillouin Light Scattering in Air-Slit Suspended Waveguide Photonics floating waveguide structure Brillouin gain phonon frequency tunability tunable SBS phonon laser |
| title | Tailorable Brillouin Light Scattering in Air-Slit Suspended Waveguide |
| title_full | Tailorable Brillouin Light Scattering in Air-Slit Suspended Waveguide |
| title_fullStr | Tailorable Brillouin Light Scattering in Air-Slit Suspended Waveguide |
| title_full_unstemmed | Tailorable Brillouin Light Scattering in Air-Slit Suspended Waveguide |
| title_short | Tailorable Brillouin Light Scattering in Air-Slit Suspended Waveguide |
| title_sort | tailorable brillouin light scattering in air slit suspended waveguide |
| topic | floating waveguide structure Brillouin gain phonon frequency tunability tunable SBS phonon laser |
| url | https://www.mdpi.com/2304-6732/12/6/586 |
| work_keys_str_mv | AT yanzhaowang tailorablebrillouinlightscatteringinairslitsuspendedwaveguide AT hongrunren tailorablebrillouinlightscatteringinairslitsuspendedwaveguide AT yunjieteng tailorablebrillouinlightscatteringinairslitsuspendedwaveguide |