2018/04/01 by Eduardo Aluicio‐Sarduy, Aluicio-Sarduy, Eduardo, Simone Callegari +9
Engineering · Physics and Astronomy · #FOS: Physical sciences #General Physics (physics.gen-ph) #Photonic Crystals and Applications #Photonic and Optical Devices #Plasmonic and Surface Plasmon Research
paper · pdf · doi:10.48550/arxiv.1804.04491
openalex publication_date 2018/04/01 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
A tuning of the light transmission properties of 1D photonic structures\nemploying an external stimulus is very attracting and opens the way to the\nfabrication of optical switches for colour manipulation in sensing, lighting,\nand display technology. We present the electric field-induced tuning of the\nlight transmission in a photonic crystal device, made by alternating layers of\nsilver nanoparticles and titanium dioxide nanoparticles. We show a shift of\naround 10 nm for an applied voltage of 10 V. We ascribe the shift to an\naccumulation of charges at the silver/TiO2 interface due to electric field,\nresulting in an increase of the number of charges contributing to the plasma\nfrequency in silver, giving rise to a blue shift of the silver plasmon band,\nwith concomitant blue shift of the photonic band gap. The employment of a\nrelatively low applied voltage gives the possibility to build a compact and\nlow-cost device. We also propose the fabrication of 1D photonic crystal and\nmicrocavities employing a magneto-optical material as TGG (Tb3Ga5O12). With\nthese structures we can observe a shift of 22 nm with a magnetic field of 5 T,\nat low temperature (8 K). The option to tune the colour of a photonic crystal\nwith magnetic field is interesting because of the possibility to realize\ncontactless optical switches. We also discuss the possibility to achieve the\ntuning of the photonic band gap with UV light in photonic crystals made with\nindium tin oxide (ITO).\n