We have fabricated a controllable light filter using an all-solid-state switchable mirror incorporating a Mg-Ir thin film for use in preterm infant incubators. The solid-state switchable mirror device was fabricated by depositing a multilayer on a glass substrate. The mixed hydride of MgH2 and Mg6Ir2H11 created from the Mg-Ir thin film is red in the transparent state. The optical switching speeds between the reflective and transparent red states depended on applied voltage. The device showed three states, namely, reflective, black, and transparent red, due to the properties of the switchable mirror material. These results suggest that the material could be used as a controllable light filter for preterm infant incubators, since it eliminates the light wavelength that disturbs regular sleep-wake cycles of preterm infants.
Received 28 January 2013Accepted 01 April 2013Published online 26 April 2013
This work was supported in part by the 2009 Industrial Technology Research Grant Program (Project Nos. 09B36002a and 09A07024a) from the New Energy and Industrial Technology Development Organization (NEDO) of Japan.
7.K. Tajima, M. Shimoike, H. Hotta, H. Li, M. Inagaki, H. Izumi, M. Seki, T. Toda, M. Akiyama, Y. Matsushima, M. Nakagawa, and H. Ohta, “Switchable Metallic Mg-Ir Thin-Film Light Filter to Control Lighting Environments for Preterm Infants,” Appl. Phys. Express. (unpublished).