Figure | Polarization-dependent optical response of the quasi-1D Ta₂PdS₆. (IMAGE)
Caption
a, The direction-dependent optical properties of Ta2PdS6. Theoretical simulations of the polarized optical absorption of Ta2PdS6. Ta2PdS6 exhibits significant polarized absorption properties under optical excitation at 1.56 μm (corresponding to a photon energy of about 0.8 eV). b, The polarization-dependent transmission at various incidence powers. The anisotropic transmittance of Ta2PdS6 was experimentally measured under laser excitation at a wavelength of 1.56 μm. The results show that the light absorption intensity is related to the polarization state, and the polarization contrast increases with the increase in pump power. c, Ta2PdS6 nonlinear transmission versus energy intensity at various tilt angles. d, The nonsaturable loss of Ta2PdS6 for various tilt angles. With the polarization control angle from 0° to 180°, the parameters of Ta2PdS6 saturation intensity and modulation depth formed regular oscillations. Among them, the non-saturable loss shows a significant variation, with the maximum saturable absorption loss of about 65.8% at a tilt angle of 0° and the minimum saturable loss of about 56.3% at a tilt angle of 180°. The polarization-dependent variation of the non-saturable loss in quasi-one-dimensional Ta2PdS6 provides a new degree of freedom for the state regulation of ultrafast systems.
Credit
by Zixin Yang, Qiang Yu, Jian Wu, Haiqin Deng, Yan Zhang, Wenchao Wang, Tianhao Xian, Luyi Huang, Junrong Zhang, Shuai Yuan, Jinyong Leng, Li Zhan, Zongfu Jiang, Junyong Wang, Kai Zhang, and Pu Zhou
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CC BY