Room-Temperature Quasi-Continuous-Wave Pentacene Maser Pumped by an Invasive Ce:YAG Luminescent Concentrator

@article{Wu2020RoomTemperatureQP,
  title={Room-Temperature Quasi-Continuous-Wave Pentacene Maser Pumped by an Invasive 
Ce:YAG
 Luminescent Concentrator},
  author={Hao Wu and Xiangyu Xie and Wern Ng and Seif Mehanna and Ying Li and Max Attwood and Mark Oxborrow},
  journal={arXiv: Applied Physics},
  year={2020}
}
We present in this work a quasi-continuous-wave (CW) pentacene maser operating at 1.45 GHz in the Earth's magnetic field at room temperature with a duration of $\sim$4 ms and an output power of up to -25 dBm. The maser is optically pumped by a cerium-doped YAG (Ce:YAG) luminescent concentrator (LC) whose wedge-shaped output is embedded inside a 0.1% pentacene-doped para-terphenyl (Pc:Ptp) crystal. The pumped crystal is located inside a ring of strontium titanate (STO) that supports a TE$_{01… 

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