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http://hdl.handle.net/10397/95682
Title: | Robust and flexible random lasers using perovskite quantum dots coated nickel foam for speckle-free laser imaging | Authors: | Gao, W Wang, T Xu, J Zeng, P Zhang, W Yao, Y Chen, C Li, M Yu, SF |
Issue Date: | 1-Oct-2021 | Source: | Small, 1 Oct. 2021, v. 17, no. 39, 2103065 | Abstract: | The advantage of using flexible metallic structures as the substrate of flexible lasers over plastic materials is its strong mechanical strength and high thermal conductivity. Here, it is proposed to deposit CsPbBr3 perovskite quantum dots onto Ni porous foam for the realization of flexible lasers. Under two-photon 800 nm excitation at room temperature, incoherent random lasing emission is observed at ≈537 nm. By external deformation of the Ni porous foam, incoherent random lasing can be tuned to amplified spontaneous emission as well as the corresponding lasing threshold be controlled. More importantly, it is demonstrated that the laser is robust to intensive bending (>1000 bending cycles) with minimum effect on the lasing intensity. This flexible laser is also shown to be an ideal light source to produce a “speckle” free micro-image. | Keywords: | Flexible lasers Incoherent random lasing Ni porous foams Perovskite quantum dots Two-photon excitation |
Publisher: | Wiley-VCH | Journal: | Small | ISSN: | 1613-6810 | EISSN: | 1613-6829 | DOI: | 10.1002/smll.202103065 | Rights: | © 2021 Wiley-VCH GmbH This is the peer reviewed version of the following article: Gao, W., Wang, T., Xu, J., Zeng, P., Zhang, W., Yao, Y., ... & Yu, S. F. (2021). Robust and Flexible Random Lasers Using Perovskite Quantum Dots Coated Nickel Foam for Speckle‐Free Laser Imaging. Small, 17(39), 2103065, which has been published in final form at https://doi.org/10.1002/smll.202103065. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
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Gao_Robust_Flexible_Random.pdf | Pre-Published version | 2.41 MB | Adobe PDF | View/Open |
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