Dawei Liang

Associate Professor at FCT NOVA, Physics Dept.
Head of Research

242 - Ed. I

(+351) 21 294 85 76 10528

Research Areas

The conversion of solar radiation into laser radiation by solar pumping is of increasing importance because free broadband sunlight can be converted into amazing laser light, which is a source of narrowband, collimated radiations with extremely high brightness and intensity. Our solar laser laboratory at New University of Lisbon was established over a decade ago, embarking on a challenging journey to significantly improve both solar-to-laser conversion efficiency and the output beam quality of solar-pumped lasers. Thanks to a huge amount of painstaking research efforts, we have attained some international recognitions and highlights.

Main publications


Liang, D.; Almeida, J.; Tibúrcio, B. D.; Catela, M.; Garcia, D.; Costa, H.; Vistas, C. R. Seven-Rod Pumping Approach for the Most Efficient Production of TEM00 Mode Solar Laser Power by a Fresnel Lens. J. Sol. Energy Eng. Trans. ASME 143, [061004] (2021). https://doi.org/10.1115/1.4051223


Liang, D.; Almeida, J.; Garcia, D.; Tibúrcio, B. D.; Guillot, E.; Vistas, C. R.  Simultaneous solar laser emissions from three Nd:YAG rods within a single pump cavity. Sol. Energy 199, 192-197 (2020).


Liang, D.; Vistas, C. R.; Almeida, J.; Tibúrcio, B. D.; Garcia, D. Side-pumped continuous-wave Nd:YAG solar laser with 5.4% slope efficiency. Sol. Energy Mater. Sol. Cells 192, 147-153 (2019). 


Liang, D.; Vistas, C. R.; Tibúrcio, B. D.; Almeida, J. Solar-pumped Cr:Nd:YAG ceramic laser with 6.7% slope efficiency. Sol. Energy Mater. Sol. Cells 185, 75-79 (2018). https://doi.org/10.1016/j.solmat.2018.05.020


Liang, D.; Almeida, J.; Vistas, C. R.; Guillot, E. Solar-pumped Nd:YAG laser with 31.5 W/m2 multimode and 7.9 W/m2 TEM00-mode collection efficiencies. Sol. Energy Mater. Sol. Cells 159, 345-349 (2017). 
https://doi.org/10.1016/j.solmat.2016.09.048 Featured in Laser Focus World


Liang, D.; Almeida, J.; Guillot, E. Side-pumped continuous-wave Cr:Nd:YAG ceramic solar laser. Appl. Phys. B: Lasers Opt. 111, 305-311 (2013). 


Liang, D.; Almeida, J. Solar-pumped TEM00 mode Nd:Yag laser. Opt. Express 21, 25107-25112 (2013). https://doi.org/10.1364/OE.21.025107 Featured in Laser Focus World


More information in:

ORCID: 0000-0002-4406-4108

Scopus Author ID: 7202206600