Open AccessTin diselenide as a new saturable absorber for generation of laser pulses at 1μm
Author(s) -
Chen Cheng,
Ziqi Li,
Ningning Dong,
Jun Wang,
Feng Chen
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.006132
Subject(s) - saturable absorption , materials science , diselenide , optics , laser , absorption (acoustics) , lasing threshold , optoelectronics , tin , saturation (graph theory) , excitation , wavelength , fiber laser , physics , selenium , mathematics , combinatorics , metallurgy , composite material , electrical engineering , engineering
The nonlinear optical responses of two-dimensional (2D) few-layer tin diselenide (SnSe 2 ) have been investigated in this work. By applying the Z-scan technique, the saturable absorption of SnSe 2 thin film has been observed at a wavelength of ~1μm, which enables SnSe 2, a new saturable absorber for pulsed laser generation. A detailed exploration of the nonlinear absorption of SnSe 2 film and their dependence on excitation pulse energy is carried out. Our results show that saturation intensity of the nonlinear absorption is ~23.78 GW/cm 2 and corresponding nonlinear absorption coefficients are at a range from -13596 to -2967.3 cm/GW. By employing the SnSe 2 -coated mirror as a saturable absorber, the passively Q-switched lasing has been achieved on a crystalline waveguide platform at ~1 μm.