Nonlinear Bleaching of InAs Nanowires in the Visible Range

Spectral and nonlinear optical properties of InAs nanowires synthesized via molecular beam epitaxy suspended in isopropanol are studied in this work at room temperature. The absorption spectra with a characteristic maximum at a wavelength of 235 nm, as well as the Raman spectra in a range of 180–280 cm –1 , are obtained. The nonlinear transmittance of InAs nanowires with diameters less than the exciton Bohr radius was firstly investigated by a two-photon excitation in the transparent region (λ = 468 nm). The effect of cumulative bleaching, the manifestation of which is associated with the dynamic Stark effect, was discovered.