Liquid metal as a broadband saturable absorber for passively Q -switched lasers
2020
We demonstrated the efficient plasmon-induced nonlinear absorption
of liquid metal GaInSn nanospheres prepared by a facile liquid-phase
method. With GaInSn as saturable absorbers, a passively Q-switching
operation was obtained at both 1.3 and 2 μm. The pulse width of 32 ns was
achieved at 1.3 μm with repetition rate of 44 kHz, single pulse energy of
51.9 μJ, and output power of 425 mW. Meanwhile, 510 ns and 92 kHz pulses
with energy of 36.1 μJ and output power of 2.48 W were obtained at 2 μm.
This work provides the potential of liquid metal for improving metal
functions and flexible optical devices.
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