Buranasiri, Prathan

Loading...
Thumbnail Image
Preferred name
Buranasiri, Prathan
Alternative Name
Buranasiri, P.
Main Affiliation
Email
prathan.bu@kmitl.ac.th

Settings

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Phase-matched second-harmonic generation in core-shell nanowire hyperbolic metamaterial
    (2022-09-01)
    Wicharn, Surawut
    ;
    Banerjee, Partha P.
    ;
    Buranasiri, Prathan
    Second-harmonic generation is well-known nonlinear frequency conversion technique, which can be applied in nonlinear optical characterization of materials and all-optical signal processing. This phenomenon requires phase-matching to maximize the conversion efficiency of generated second-harmonic field. But the phase-matching condition is difficult to achieve because of dispersion of naturally existing materials. To overcome this limitation, we propose an innovative phase-matching technique, which is called hyperbolic phase-matching, that can be possibly achieved by managing dispersion of a hyperbolic metamaterial. Here, the hyperbolic metamaterial is made of two-dimensional periodic arrays of core-shell nanowires, which have aluminium gallium arsenide as a core and gold as a shell, immersed in anodic aluminium oxide matrix. We have demonstrated phase-matched conditions for two different non-collinear second-harmonic interacting configurations in the metamaterial, which can be created by tuning incident angle of pump field to optimal values. Finally, conversion efficiencies of transmitted and reflected second-harmonic pulses as a function of incident angle and input pulse intensity were examined. The maximum conversion efficiencies are obtained at optimal incident angle and largest pumping intensity.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    A birefringent phase-matching method in multilayered hyperbolic metamaterials
    (2018-01-01)
    Wicharn, Surawut
    ;
    Plaipichit, Suwan
    ;
    Seesan, Thitiya
    ;
    Buranasiri, Prathan
    Multilayered hyperbolic metamaterials (MHM) is proposed to create phase matching of fundamental-frequency (FF) and third-harmonic (TH) field components with a unique dispersion provided by the engineered MHM structure for third-harmonic generation in ultra-short pulse regime. In this work, we analytically study the ensuing possibilities and demonstrate that a birefringent phase-matching can be alternatively achieved with a wide range of involved material parameters and optimal engineering of MHM structure. When the phase-matched conditions is satisfied by birefringent phase-matching method, the growth rate of the TH intensity generating as a function of the nonlinear-optical interaction length to be obviously increased. This method opens new ways of improving the conversion efficiency of frequency tripling regardless of the coherence length in the bulk of a nonlinear material.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Nonlinear cross-polarization generation of optical wave propagating through a nanorods-based hyperbolic metamaterial
    (2020-01-01)
    Wicharn, Surawut
    ;
    Buranasiri, Prathan
    In this study, the nonlinear orthogonal rotation of a linear polarized optical wave propagating through a nanorods-based hyperbolic metamaterial (NRHMM) was investigated numerically. This process is described by degenerate four-wave mixing (DFWM) of three strong linearly polarized pump waves and a weak generated orthogonal polarized wave, sometime called nonlinear-cross polarized wave (XPW) generation. The efficient nonlinear cross-polarization generation was created by optimal design of NRHMM structure, which made of two-dimensional periodically arrangement of subwavelength-sized indium tin-oxide (ITO) nanorods immersed in barium difluoride (BaF<inf>2</inf>) host dielectric material. Numerical results showed that the field intensity of nonlinear XPW conversion are dependent on the incident angle and the intensities of input pumping wave. By optimizing the radius and the lattice formation of ITO nanorods arrangement, the nearly perfect phase-matched condition for the nonlinear process based on hyperbolic phase-matching (HPM) method was achieved implicitly and exhibited by the intersection point of isofrequency contour of each interacting waves in wave-vector space. The intersection points would exhibit the optimal value of incident angle of pumping waves, which satisfy the phase-matched condition. Finally, the maximum conversion efficiencies at various pumping levels were obtained at this condition.