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Metasurface, as a kind of metamaterials with only one or two layers of functional structures, has arouses a world-wide research enthusiasm during the past several years. Especially, recent studies on metasurfaces working in the terahertz regime has partly fullfilled the emergent lack for the terahertz devices, which is a long-term bottleneck on the terahertz science and technology. Until now, most...
In this paper, we make a comprehensive study on a highly efficient half-open cavity design for high power random fiber laser (RFL). With the theoretical analysis, we optimize the cavity's fiber length for getting higher output power within the scheme, i.e., shorter fiber length is preferred for efficiently harvesting the first order random lasing at the open end of the cavity. As the verification...
We present a high power terahertz time-domain spectroscopy (THz-TDS) pumped by an all photonic crystal fiber (PCF) femtosecond laser system, and studied the effects of pulse shape working on the terahertz conversion efficiency.
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