Sorayaie Parvin, Kolahdouz Mohammadreza, Tehrani Zahra Baghbani, Hajshahvaladi Leila, Abbasi Media, Batoomchi Farzad, Parsanasab Gholam-Mohammad
School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Integrated Photonics Laboratory, Faculty of Electrical Engineering, Shahid Beheshti University, Tehran, Iran.
Sci Rep. 2025 Feb 19;15(1):6034. doi: 10.1038/s41598-025-90629-5.
This paper explores the development and optimization of organic near-infrared micro-cavity lasers for biophotonic applications. Four micro-bottle laser configurations inclouding single-layer, two-layer, and three-layer structures were designed and fabricated using Nile-Blue (NB) and Rhodamine B (RhB) laser dyes doped in SU-8 polymer as laser-active materials. While NB achieves lasing near 750 nm, its absorption of common pump sources such as Nd: YAG lasers at 532 nm is limited. Therefore, Forster resonance energy transfer (FRET) between RhB and NB was employed to enhance NB's lasing efficiency under 532 nm excitation. Experimental and simulation results demonstrate that multilayer designs, particularly the three-layer configuration, outperform others, achieving higher emission intensity, improved stability, and reduced lasing thresholds. The inclusion of RhB optimizes pump absorption and enables efficient energy transfer, facilitating stable Near-IR lasing at 720-750 nm. These findings highlight the potential of multilayer micro-cavity lasers for compact, efficient, and stable organic laser systems in biophotonic and sensing applications.
本文探讨了用于生物光子学应用的有机近红外微腔激光器的开发与优化。使用掺杂在SU-8聚合物中的尼罗蓝（NB）和罗丹明B（RhB）激光染料作为激光活性材料，设计并制作了包括单层、双层和三层结构的四种微瓶激光器配置。虽然NB在750nm附近实现了激光发射，但其对532nm的常见泵浦源（如Nd:YAG激光器）的吸收有限。因此，采用RhB与NB之间的荧光共振能量转移（FRET）来提高NB在532nm激发下的激光发射效率。实验和模拟结果表明，多层设计，特别是三层配置，性能优于其他设计，实现了更高的发射强度、更好的稳定性和更低的激光阈值。加入RhB优化了泵浦吸收并实现了高效的能量转移，促进了在720 - 750nm处的稳定近红外激光发射。这些发现突出了多层微腔激光器在生物光子学和传感应用中用于紧凑、高效和稳定的有机激光系统的潜力。
