Fig. 2: Uniformity of the optical properties over mm-scale.
From: Macroscopic transition metal dichalcogenides monolayers with uniformly high optical quality
a Optical microscope image of a D/MoSe2/D MML, where the field of view of 2.500\(\times\)1.875 mm2 is divided into a 20\(\times\)15 grid of 125 × 125 \(\mu\)m2 square pixels as marked by the grey lines, and PL and RC are measured at a spot (marked by the yellow dots) in each pixel, where there are no visible microscopic wrinkles or cracks. b–j Maps of the peak energy (top row, b, e, h), linewidth (middle row, c, f, i), and intensity (bottom row, d, g, j) obtained from trion PL (left, b–d), exciton PL (middle, e–g), and exciton RC (right, h–j) spectra. k–m The coefficient of variation, CV, of (k) peak energy, (l) linewidth, and (m) intensity of exciton PL (green triangle) and RC (black dot) as a function of mapping area.
