AI Article Synopsis
- Miniature random lasers are important for fields like barcoding, bioimaging, and on-chip technologies, but creating size-tunable, biocompatible versions has been difficult.
- This study used poly(lactic-co-glycolic) acid (PLGA), a medical-approved material, to create monodisperse dye-doped PLGA spheres with controllable sizes from 25 to 52 µm.
- The spheres showed strong lasing emissions at wavelengths of 610-640 nm and a high quality factor of 3100, with detailed analysis providing insights into their structure.
Article Abstract
Miniature random lasers with high quality factor are crucial for applications in barcoding, bioimaging, and on-chip technologies. However, achieving monodisperse and size-tunable biocompatible random lasers has been a significant challenge. In this study, we employed poly(lactic-co-glycolic) acid (PLGA), a biocompatible material approved for medical use, as the base material for random lasers. By integrating a dye-doped PLGA solution with a microfluidic system, we successfully fabricated monodisperse and miniature dye-doped PLGA spheres with tunable sizes ranging from 25 to 52 µm. Upon optical pulse excitation, these spheres exhibited strong random lasing emission at 610-640 nm with a threshold of approximately 22 µJ·mm. The lasing modes demonstrated a spectral linewidth of 0.2 nm, corresponding to a quality factor of 3100. Fourier transform analysis of the lasing emission revealed fundamental cavity lengths, providing insights into the properties of the random lasers.
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| http://dx.doi.org/10.1364/OL.538543 | DOI Listing |
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