研究目的
Investigating the anisotropic third-order nonlinearity in pristine and lithium hydride intercalated black phosphorus.
研究成果
The study demonstrates strong third-order nonlinear optical responses in single crystal BP and LiH-BP flakes, with LiH-BP showing higher nonlinear coefficients than BP. The findings suggest that lithium hydride intercalation enhances the nonlinear optical response due to donor-acceptor type interactions, indicating potential applications in mid-infrared nonlinear photonics devices.
研究不足
The rapid degradation of BP under ambient conditions limits its practical applications. The study focuses on single flakes, which may not represent the behavior of BP in bulk or composite forms.
1：Experimental Design and Method Selection:
A polarization-resolved microscopic femtosecond Z-scan technique was used to measure the third-order nonlinear optical responses in exfoliated BP and LiH-BP flakes.
2：Sample Selection and Data Sources:
Ultrathin BP nanosheets were mechanically exfoliated from bulk crystals onto quartz substrates. Some substrates were transferred to an ultrahigh vacuum chamber for Li intercalation.
3：List of Experimental Equipment and Materials:
A femtosecond laser with a central wavelength of 1030 nm and a pulse duration of 140 fs, objective lens (magnification: 10×, numerical aperture:
4：25), CCD camera. Experimental Procedures and Operational Workflow:
The nonlinear optical properties were measured by focusing the beam on targeted flakes using an objective lens combined with a CCD camera to observe the transmitted laser beam.
5：Data Analysis Methods:
The nonlinear absorption coefficient and nonlinear refractive index were derived from the Z-scan results.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
