Full text loading...
Measured second harmonic intensity and relative phase for sample A as a function of input laser polarization at three different device voltage biases (VA ). In (a), we plot the p-polarized SHG intensity. In (b), we plot the s-polarized SHG intensity. In (c), we plot relative phase of the p and s polarized SHG. The 0 V and +10 V data in (a) and (b) are scaled by 5× to improve visibility. Solid lines are the fitting result, as described in the text. The inset shows the device structure of sample A, bias geometry, and optical experimental configuration.
Second harmonic intensity (a) and (d), relative phase (b) and (e), and current (c) and (f) as a function of applied bias voltage. In (a) and (d), the SHG intensity is shown for different input laser polarizations: red circles: pP, blue squares: sP, green point-up triangles: mixP, black point-down triangles: mixS. Panels (b) and (e) show the phase difference between the mixP and mixS SHG signal. Panels (c) and (f) show the IV curves. Solid lines are fits to Eqs. (3)–(5), as described in the text. The resulting fit parameters are listed in Table I. The increasing sample B SHG signal for VA > 5 V cannot be explained by the physics underlying the fit equations and so is not fitted.
Resulting fit parameters from least squares fitting of the SHG data to Eqs. (3)–(5). The solid lines in Figs. 1 and 2 show the fit results.
Article metrics loading...