28 April 2015 Wire-grid polarizer using galvanic growth technology: demonstration of a wide spectral and angular bandwidth component with high extinction ratio
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Abstract
Functional demonstration of a wide band, wide angular width wire-grid polarizer has been made in the framework of a user project of the European project ACTMOST (Access To Micro-Optics Expertise, Services and Technologies). The polarization function relies on linear polarizers using the wire-grid polarizer principle by means of a metal grating of unusually large period, exhibiting a large extinction of the transmission of the TE polarization in the 850-nm wavelength range. This grating achieves a broadband and especially high angular aperture reflection with low loss and permits resorting to very low cost incoherent light sources for the transmitted TM polarization. This paper will describe the design, the modeling and optimization, as well as the complete technological process chain, that has been used, starting with the photoresist grating printing using phase-mask UV-based lithography to the uniform galvanic growth of a very shallow gold grating on transparent conductive layer deposited on a glass substrate. Transmission curves for both polarizations performed on the first demonstrators will be presented.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Isabelle Verrier, Thomas Kämpfe, Frederic Celle, Anthony Cazier, Markus Guttmann, Barbara Matthis, Janne Laukkanen, Frédéric Lacour, Colette Veillas, Stéphanie Reynaud, Olivier Parriaux, Yves Jourlin, "Wire-grid polarizer using galvanic growth technology: demonstration of a wide spectral and angular bandwidth component with high extinction ratio," Optical Engineering 54(4), 047105 (28 April 2015). https://doi.org/10.1117/1.OE.54.4.047105 . Submission:
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