| Title: | Smectic bubble lasers for acoustic and pressure measurements in air and water |
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| Authors: | ID Korenjak, Zala, Institut "Jožef Stefan" (Author)
ID Humar, Matjaž, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://journals.aps.org/prapplied/abstract/10.1103/p1mc-1gp6
 PDF - Presentation file, download (2,28 MB)
MD5: 7F07F571E716CD9BFC1D60AA738245CC
Description: Raziskovalni podatki so na voljo v repozitoriju Zenodo: https://doi.org/10.5281/zenodo.15878963.
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | Recently, we have demonstrated that dye-doped soap and smectic bubbles can be used as lasers. Here we investigated smectic bubble lasers for their potential to measure pressure changes in both air and water and as microphones. Smectic bubbles consist of a very thin smectic liquid crystal film. In contrast to ordinary soap bubbles, smectic bubbles are highly stable. When illuminated with a pump laser, they exhibit whispering gallery mode lasing with sharp, regularly spaced peaks in the emission spectrum. The bubbles enable extremely precise measurement of pressure changes based on wavelength shifts of the lasing peaks. We have demonstrated that smectic bubbles can be inflated under water and used as water pressure sensors. Additionally, we have used smectic bubble lasers in air as highly sensitive microphones to detect sound waves across different frequencies with advantages over conventional microphones. Their extremely thin walls result in negligible acoustic impedance. Furthermore, bubble size changes due to pressure variations depend only on bubble volume, eliminating the need for calibration and making performance independent of manufacturing precision or defects. This also leads to a linear amplitude response, and a flat frequency response over a wide range of frequencies. Unlike most microphones, bubble lasers can measure arbitrarily small frequencies down to static pressure, making them promising candidates for acoustic wave detection in various applications. |
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| Keywords: | smectic bubbles, liquid crystal lasers, smectic liquid crystals, water pressure |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 14.03.2025 |
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| Article acceptance date: | 11.08.2025 |
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| Publication date: | 01.09.2025 |
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| Publisher: | American Physical Society |
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| Year of publishing: | 2025 |
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| Number of pages: | str. 034023-1-034023-7 |
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| Numbering: | Vol. 24, iss. 3, [article no.] 034023 |
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| Source: | ZDA |
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| PID: | 20.500.12556/DiRROS-23640  |
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| UDC: | 53 |
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| ISSN on article: | 2331-7019 |
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| DOI: | 10.1103/p1mc-1gp6 |
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| COBISS.SI-ID: | 249310979 |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 17. 9. 2025;
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| Publication date in DiRROS: | 18.09.2025 |
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| Views: | 260 |
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| Downloads: | 137 |
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