(color online) (a) Schematic setup of a microscopic nonlinear optical absorption setup. Inset shows optical micrograph of MoSe₂ on silver mirror (scale bar, 20 μm). (b) Nonlinear reflectance and (c) normalized absorption of monolayer MoSe₂ on silver mirror, showing uniform nonlinear optical characteristics (a modulation depth of ∼ 80% and a saturation intensity ∼ 2.5 MW/cm² over the broad spectral range 720–812 nm.^[88]