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In this paper, we study the feasibility and suitability of two beam focusing techniques, i.e., Brillouin-and immersed flow, to be used in a novel device which can be up-scaled in power via increasing the number of beams, and in frequency via reducing the spatial period of the photonic crystal.
Multi-beam slow-wave devices, such as photonic free-electron lasers (pFEL), are promising for power up-scaling of THz sources. However, multi-beam concepts usually require wide and hence overmoded slow-wave structures. This could lead to undesired multimode output. Here, we present single-mode power up-scaling of a pFEL when increasing the electron beam number.
A photonic Free-Electron Laser is a novel device concept that uses multiple electron beams and a photonic crystal to enable both frequency- and power-scaling. Particle-in-cell calculations show that the three-beam provides more than 3× the power of the single-beam device, 290 vs 35 W.
Sending electrons through photonic crystals (PhC) is of high interest for generating widely tunable, coherent light. We present the novel concept of a tunable laser based on Cerenkov radiation from electrons in a PhC.
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