2026-04-13T05:57:07Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2204292025-12-05T14:46:21Zcom_2072_1057col_2072_478821col_2072_478917

00925njm 22002777a 4500 dc Bian, Subiao author Xu, Xipeng author Cui, Changcai author Arteaga Barriel, Oriol author 2025-04-11T13:30:00Z 2025-04-11T13:30:00Z 2022 2025-04-11T13:30:00Z Fresnel rhombs are the most achromatic form of retarders available and they are suitable compensating elements for spectroscopic Mueller matrix ellipsometers. However, the small stress in the rhomb caused by the mount or produced during the fabrication can affect the ellipsometry measurements with non-negligible systematic errors, due to the relatively long path length of light inside the rhomb. This work describes a calibration method that considers the non-ideal response of the Fresnel rhomb, and that it is especially well suited for calibrating Mueller matrix ellipsometers. The method describes each rhomb as the most general form of an elliptical retarder with a small ellipticity, instead of simply assuming that they behave as linear retarders.After this calibration, we show that the systematic errors of measurements are significantly decreased. El·lipsometria Operadors el·líptics Interferometria Ellipsometry Elliptic operator Interferometry Calibration of achromatic Fresnel rhombs with an elliptical retarder model in Mueller matrix ellipsometers