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Browsing by Author "Syu, Yu-Cheng"

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    Design of Low-Threshold Photonic Crystal Surface-Emitting Lasers
    (2012-05-15)
    Hung, Chih-Tsang
    ;
    Syu, Yu-Cheng
    ;
    Wu, Tzeng-Tsong
    ;
    Lu, Tien-Chang
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    光電工程學系
    We have investigated the influence of various thicknesses on different layers in GaAs-based photonic crystal surface-emitting lasers (PCSELs), by using the transfer matrix and coupled wave methods to increase the vertically optical confinement factor and to reduce the threshold gain. In addition, the relationship between the threshold gain and the filling factor has been considered. This letter provides an efficient calculation method for designing square-lattice-type PCSEL structures, which shall be useful for the fabrication of low-threshold PCSELs in the near future.
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    Design of Low-Threshold Photonic Crystal Surface-Emitting Lasers (vol 24, pg 866, 2012)
    (2012-08-01)
    Hung, Chih-Tsang
    ;
    Syu, Yu-Cheng
    ;
    Wu, Tzeng-Tsong
    ;
    Lu, Tien-Chang
    ;
    光電工程學系
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    "Design of Low-Threshold Photonic Crystal Surface-Emitting Lasers (vol 24, pg 866, 2012)"
    (1970-01-01)
    Hung, Chih-Tsang
    ;
    Syu, Yu-Cheng
    ;
    Wu, Tzeng-Tsong
    ;
    Lu, Tien-Chang
    ;
    光電工程學系
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    GaN-based surface-emitting lasers using high contrast grating
    (2014)
    Lu, Tien-Chang
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    Wang, Shing-Chung
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    Wu, Tzeng-Tsong
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    Wu, Shu-Hsien
    ;
    Syu, Yu-Cheng
    GaN-based surface-emitting lasers (SELs) using high contrast grating (HCG) with AlN/GaN distributed Bragg reflectors were reported. The laser device achieved a threshold energy density of about 0.56 mJ/cm(2) and the lasing wavelength was at 393.6 nm with a high degree of polarization of 73% at room temperature. The resonant mode and polarization characteristics matched to the theoretical prediction. GaN-based SELs using HCG supported by the Fano resonance can be potential for development of blue surface emitting laser sources