The maser, older sibling of the laser, has been relatively obscure due to its demanding
operating condition of the high-vacuum system and cryogenic refrigeration. Despite this, it has
found application in ultrasensitive magnetic resonance spectroscopy, astronomy observation,
space communication, radar, and high-precision clocks. Room-temperature solid-state masers
are highly desirable. Recently a research group was successful in developing a continuous wave
solid-state diamond maser. This demonstration unlocks the potential of room-temperature
solid-state masers for use in a new generation of microwave devices. This seminar is a brief
account of the current developments in the solid-state masers.
 Breeze, J. D., Salvadori, E., Sathian, J., Alford, N. M., & Kay, C. W. (2018). Continuous-wave room-temperature diamond maser. Nature, 555(7697), 493.
 Jin, Liang, Matthias Pfender, Nabeel Aslam, Philipp Neumann, Sen Yang, Jörg Wrachtrup, and Ren-Bao Liu. "Proposal for a room-temperature diamond maser." Nature communications 6 (2015): 8251.