title: Two-Dimensional SiO2/VO2Photonic Crystals with Statically Visible and Dynamically Infrared Modulated for Smart Window Deployment.
abstract: Two-dimensional (2D) photonic structures, widely used for generating photonic band gaps (PBG) in a variety of materials, are for the first time integrated with the temperature-dependent phase change of vanadium dioxide (VO2). VO2possesses thermochromic properties, whose potential remains unrealized due to an undesirable yellow-brown color. Here, a SiO2/VO2core/shell 2D photonic crystal is demonstrated to exhibit static visible light tunability and dynamic near-infrared (NIR) modulation. Three-dimensional (3D) finite difference time domain (FDTD) simulations predict that the transmittance can be tuned across the visible spectrum, while maintaining good solar regulation efficiency (ΔTsol= 11.0%) and high solar transmittance (Tlum= 49.6%). Experiments show that the color changes of VO2films are accompanied by NIR modulation. This work presents a novel way to manipulate VO2photonic structures to modulate light transmission as a function of wavelength at different temperatures.
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Ke
authors.affiliation: Department of Electro-optical Engineering, Ben-Gurion University of the Negev , Beer Sheva 84105, Israel.
authors.forename: Igal
authors.initials: I
authors.lastname: Balin
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Qi
authors.initials: Q
authors.lastname: Lu
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Alfred Iing Yoong
authors.initials: AI
authors.lastname: Tok
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: White
authors.affiliation: Casali Center of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem , Jerusalem 91904, Israel.
authors.forename: Shlomo
authors.initials: S
authors.lastname: Magdassi
authors.affiliation: Department of Electro-optical Engineering, Ben-Gurion University of the Negev , Beer Sheva 84105, Israel.
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Abdulhalim
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
authors.forename: Yi
authors.initials: Y
authors.lastname: Long
keywords: 2D nanostructure; FDTD; color change; photonic crystal; thermochromic; vanadium dioxide