2026-10-12T01:04:44Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33909574 2026-09-17T19:38:59Z portal_1197 item_type_3 month_year_09_2026

Data for Real-time generalized terahertz time-domain ellipsometry enabled by dual-channel photoconductive antennas Huiliang Ou (17347186) Emma Pickwell-MacPherson (296900) James Lloyd-Hughes (1914130) Migrated from ePrints Generalized ellipsometry can uncover the optical properties of anisotropic materials, in which the light--matter interaction alters the polarization state. In the terahertz frequency range, generalized ellipsometry has been infrequently realized due to the challenge of rapidly controlling and measuring THz polarization. Here we report the development and calibration of a high-efficiency terahertz time-domain generalized ellipsometer based on two dual-channel photoconductive antennas. The fiber-coupled multi-pixel devices act as source and detector, and achieve a high data throughput with four independent terahertz pulses in a single optical delay scan, without the need for any bulky or slow polarization elements such as polarizers. Following a one-off system calibration, an accurate optical characterization of a uniaxially birefringent sapphire crystal serves to validate the method. Our technique benefits from efficient data throughput, full polarization-resolved capability, and reduced system complexity, paving the way to in-situ and real-time monitoring applications. 2026-09-17T19:38:59Z Dataset Dataset 10.82444/warw.33909574.v1 https://figshare.com/articles/dataset/Data_for_Real-time_generalized_terahertz_time-domain_ellipsometry_enabled_by_dual-channel_photoconductive_antennas/33909574 CC BY 4.0