Figure 4: Electrically tunable OR in the metamaterial absorber.
From: Electrifying photonic metamaterials for tunable nonlinear optics
(a) Measured excitation spectra of the OR signals under different levels of externally applied DC voltage, where the metamaterial device is excited at a series of wavelengths of constant intensity. The experimentally collected data are represented by the solid dots, and the boundaries of the coloured regions are to guide the eye. (b) The dependence of the OR output on the applied voltage when the metamaterial is pumped with fixed intensity at the wavelength of 800 nm. The corresponding magnitude of the control field Ec is labelled on the upper axis. (c) The OR signal as a function of the intensity of the excitation light at 800 nm, when the control voltage is set to 0, 2.5 and 5 V, respectively. The solid lines are the least-squares fits to the experimental data. All error bars represent s.d. from five measurements.
