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    Engineering of refractive index in sulfide chalcogenide glass by direct laser writing

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    YZhang_PGC2010
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    Type
    Conference Paper
    Authors
    Zhang, Yaping
    Gao, Yangqin cc
    Ng, Tien Khee cc
    Ooi, Boon S. cc
    Siang, Basil Chew Joo
    Hedhili, Mohamed N. cc
    Zhao, Donghui
    Jain, Himanshu
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Imaging and Characterization Core Lab
    Material Science and Engineering Program
    Photonics Laboratory
    Physical Science and Engineering (PSE) Division
    Date
    2010
    Permanent link to this record
    http://hdl.handle.net/10754/310661
    
    Metadata
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    Abstract
    Arsenic trisulfide (As2S3) glass is an interesting material for photonic integrated circuits (PICs) as infrared (IR) or nonlinear optical components. In this paper, direct laser writing was applied to engineer the refractive index of As2S3 thin film. Film samples were exposed to focused above bandgap light with wavelength at 405 nm using different fluence adjusted by laser power and exposure time. The index of refraction before and after laser irradiation was calculated by fitting the experimental data obtained from Spectroscopic Ellipsometer (SE) measurement to Tauc-Lorenz dispersion formula. A positive change in refractive index (Δn = 0.19 at 1.55 μm) as well as an enhancement in anisotropy was achieved in As2S3 film by using 10 mW, 0.3 μs laser irradiation. With further increasing the fluence, refractive index increased while anisotropic property weakened. Due to the rapid and large photo-induced modification of refractive index obtainable with high spatial resolution, this process is promising for integrated optic device fabrication.
    Citation
    Zhang Y, Gao Y, Ng TK, Ooi BS, Chew B, et al. (2010) Engineering of refractive index in sulfide chalcogenide glass by direct laser writing. 2010 Photonics Global Conference. doi:10.1109/PGC.2010.5705967.
    Sponsors
    KAUST- Academic Excellence Alliance (AEA) 2010 Grant
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    2010 Photonics Global Conference
    Conference/Event name
    2010 Photonics Global Conference, PGC 2010
    ISBN
    978-1-4244-9882-6
    DOI
    10.1109/PGC.2010.5705967
    Additional Links
    http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=5705967
    ae974a485f413a2113503eed53cd6c53
    10.1109/PGC.2010.5705967
    Scopus Count
    Collections
    Conference Papers; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Electrical Engineering Program; Material Science and Engineering Program; Photonics Laboratory; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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