A Path to Practical Solar Pumped Lasers via Radiative Energy Transfer
- A Path to Practical Solar Pumped Lasers via Radiative Energy Transfer
- 황규원; Philip D. Reusswig; Sergey Nechayev; Jennifer M. Scherer; Moungi G. Bawendi; Marc. A. Baldo; Carmel Rotschild
- semiconductor lasers; solid-state lasers
- Issue Date
- Scientific Reports
- VOL 5, NO 14758-14758-6
- The optical conversion of incoherent solar radiation into a bright, coherent laser beam enables the application of nonlinear optics to solar energy conversion and storage. Here, we present an architecture for solar pumped lasers that uses a luminescent solar concentrator to decouple the conventional trade-off between solar absorption efficiency and the mode volume of the optical gain material. We report a 750-mu m-thick Nd3+-doped YAG planar waveguide sensitized by a luminescent CdSe/CdZnS (core/shell) colloidal nanocrystal, yielding a peak cascade energy transfer of 14%, a broad spectral response in the visible portion of the solar spectrum, and an equivalent quasi-CW solar lasing threshold of 23 W-cm(-2), or approximately 230 suns. The efficient coupling of incoherent, spectrally broad sunlight in small gain volumes should allow the generation of coherent laser light from intensities of less than 100 suns.
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