Lasing from Narrow Bandwidth Light-Emitting One-Dimensional Nanoporous Photonic Crystals
Date
2022
Authors
Gunenthiran, S.
Wang, J.
Zhao, W.
Law, S.
Lim, S.Y.
McInnes, J.A.
Ebendorff-Heidepriem, H.
Abell, A.D.
Alwahabi, Z.T.
Santos, A.
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Journal article
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ACS Photonics, 2022; 9(4):1226-1239
Statement of Responsibility
Satyathiran Gunenthiran, Juan Wang, Wanxia Zhao, Cheryl Suwen Law, Siew Yee Lim, Jamie A. McInnes, Heike Ebendorff-Heidepriem, Andrew D. Abell, Zeyad T. Alwahabi, and Abel Santos
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Abstract
Nanoporous anodic alumina (NAA) is an emerging platform material for photonics and light-based applications. However, demonstrations of narrow bandwidth lasing emissions from this optical material remain limited. Here, we demonstrate that narrow bandwidth NAA-based gradient-index filters (NAAGIFs) can be optically engineered to achieve high-quality visible lasing. NAA-GIFs fabricated by a modified sinusoidal pulse anodization approach feature a well-resolved, intense, high-quality photonic stopband (PSB). The inner surface of NAA-GIFs is functionalized with rhodamine B (RhoB) fluorophore molecules through micellar solubilization of sodium dodecyl sulfate (SDS) surfactant. Systematic variation of the ratio of SDS and RhoB enables the precise engineering of the light-emitting functional layer to maximize light-driven lasing associated with the slow photon effect at the red edge of NAA-GIFs’ PSB. It is found that the optimal surfactant-to-fluorophore ratio, namely, 20 mM SDS to 0.81 mM RhoB, results in a strong, polarized lasing at ∼612 nm. This lasing was characterized by a remarkably high-quality−gain product of ∼536, a Purcell factor of 2.2, a lasing threshold of ∼0.15 mJ per pulse, and a high-quality polarization ratio of ∼0.7. Our results benefit the advancement of the NAA-based lasing technology for a variety of photonic disciplines such as sensing, tweezing, light harvesting, and photodetection.
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© 2022 American Chemical Society.