Nanosecond time-resolved characterization of a pentacene-based room-temperature MASER.

ABSTRACT: The performance of a room temperature, zero-field MASER operating at 1.45 GHz has been examined. Nanosecond laser pulses, which are essentially instantaneous on the timescale of the spin dynamics, allow the visible-to-microwave conversion efficiency and temporal response of the MASER to be measured as a function of excitation energy. It is observed that the timing and amplitude of the MASER output pulse are correlated with the laser excitation energy: at higher laser energy, the microwave pulses have larger amplitude and appear after shorter delay than those recorded at lower laser energy. Seeding experiments demonstrate that the output variation may be stabilized by an external source and establish the minimum seeding power required. The dynamics of the MASER emission may be modeled by a

SUBMITTER: Salvadori E 

PROVIDER: S-EPMC5294447 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature