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17.4: Ultra‐thin Broadband Thin Film Polarizers by Photoalignment
Author(s) -
Pan Su,
Ho Jacob Y.,
Kwok Hoi-Sing
Publication year - 2018
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.12677
Subject(s) - polarizer , materials science , dichroic glass , optoelectronics , thin film , broadband , optics , doping , nanotechnology , physics , birefringence
Ultra‐thin broadband polarizers with high performance are urgently demanded as the prosperous development of ultra‐thin and flexible displays. We have realized high‐dichroic‐ratio AD‐1 polarizers by the photoalignment technique, and its functional band is in the blue region. To obtain a broadband polarizer in the whole visible region, a simple additional iodine doping process is investigated. We also compare the final broadband polarizers by doping the iodine in both the atmosphere and vacuum. Moreover, by in situ exposure of polarized light during the doping process, the maximum dichroic ratio is improved to 29, which is satisfactory for the ultra‐thin and flexible OLED displays. Therefore, a simple and economical technique is offered to realize advanced displays with low cost, ultra‐thin profile, flexible style, and high performance.