Figure 7.

Study of nanometrology using microsphere-assisted Linnik interferometry: (a) contrast transfer function (CTF) of breadboard Linnik determined with the aperture diaphragm (AD) open/closed (red/blue) and then assisted with a 130 μm diameter glass microsphere with the AD open/closed (green/orange), (b) simulation showing the real part of the electric field distribution and the conversion of an evanescent wave into a propagating wave by a glass microsphere (n_s = 1.5, λ₀ = 600 nm, D = 3 μm). Reprinted with permission from Boudoukha, R.; Perrin, S.; Demagh, A.; Montgomery, P.; Eddine Demagh, N.; Lecler, S. Near- to Far-Field Coupling of Evanescent Waves by Glass Microspheres. Photonics2021, 8, 3, 73. Copyright 2021 MDPI.²¹