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Photonic Devices: Sol–Gel Substrates with Engineered Multiple Photonic Bandgaps for Full‐Color Photonic Devices (Small 19/2011)
Author(s) -
Lee Seong Hwan,
Ha Na Young
Publication year - 2011
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201190072
Subject(s) - materials science , photonics , lasing threshold , fabrication , optoelectronics , photonic crystal , substrate (aquarium) , sol gel , laser , diode , nanotechnology , optics , wavelength , medicine , oceanography , alternative medicine , physics , pathology , geology
The picture shows an inorganic glass fi lm with multiple photonic band gaps (MPBGs). The fi lm is fabricated by sol‐gel processing of TiO 2 , SiO 2 , and mixed SiO 2 ‐TiO 2 films. In the visible region, the spectral characteristics of MPBGs can be controlled by adjusting fabrication parameters. Using the film with engineered MPBGs, pixelated redgreenblue lasing emissions are achieved in a single sol‐gel resonator with three kinds of dye‐doped nematic liquid crystals. With easy fabrication via wet‐processing, unique optical characteristics, and the advantages of an inorganic glass, the new sol‐gel film is a functional substrate with enhanced optical performance for wide‐band photonic applications such as refl ective displays, organic lasers, and organic light‐emitting diodes.