Maser
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![nature magazine cover](https://pxl-imperialacuk.terminalfour.net/fit-in/959x430/prod01/channel_2/media/migration/research-groups/Continuous-wave-room-temperature-diamond-maser--tojpeg_1523460103952_x4.jpg)
'Continuous-wave room-temperature diamond maser' - A paper from Jonathan D. Breeze, Enrico Salvadori, Juna Sathian, Neil McN. Alford, and Christopher W.M. Kay on the front cover of Nature (March 2018)
![A diamond inside a sapphire ring lit by a green laser.](https://pxl-imperialacuk.terminalfour.net/fit-in/959x430/prod01/channel_2/media/migration/research-groups/A-diamond-inside-a-sapphire-ring-lit-by-a-green-laser---tojpeg_1523452999679_x4.jpg)
A diamond inside a sapphire ring lit by a green laser
![nature magazine cover August 2012](https://pxl-imperialacuk.terminalfour.net/fit-in/959x430/prod01/channel_2/media/migration/research-groups/room-temperature-solid-state-maser-2--tojpeg_1523542650152_x4.jpg)
'Room-temperature solid-state maser' - A paper from Mark Oxborrow, Jonathan D. Breeze, and Neil McN. Alford on the front cover of Nature (August 2012)
![sapphire and crystal](https://pxl-imperialacuk.terminalfour.net/fit-in/959x430/prod01/channel_2/media/migration/research-groups/5_back_lit_yellow_landscape--tojpeg_1482150089389_x4.jpg)
Sapphire resonator containing single crystal of pentacene-doped p-terphenyl
![maser pulse](https://pxl-imperialacuk.terminalfour.net/fit-in/959x430/prod01/channel_2/media/migration/research-groups/raw_maser_power_versus_time_no_preamplfier--tojpeg_1479122220246_x4.jpg)
The first solid-state room-temperature maser burst observed upon illuminating a pentacene:p-terphenyl/sapphire resonator with 592 nm light from a pulsed dye laser
![crystal](https://pxl-imperialacuk.terminalfour.net/fit-in/959x430/prod01/channel_2/media/migration/research-groups/crystal--tojpeg_1482149767713_x4.jpg)
Pentacene-doped p-terphenyl single crystal grown by Bridgman–Stockbarger method
![as grown crystal](https://pxl-imperialacuk.terminalfour.net/fit-in/959x430/prod01/channel_2/media/migration/research-groups/6_as_grown_crystal--tojpeg_1482150286839_x4.jpg)
Pentacene-doped p-terphenyl crystal grown by the Bridgman–Stockbarger method