Geometrical optics approximation for plane-wave scattering by a rectangular groove on a surface Cao, Zhaolou ; Cui, Fenping ; Xian, Fenglin ; Li, Jinhua ; Pei, Shixin Abstract Publication: Applied Optics Pub Date: March 2020 DOI: 10.1364/AO.386733 Bibcode: 2020ApOpt..59.2600C