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Siam Physics Congress 2018

21–23 May 2018
Topland | Hotel & Convention Center Phitsanulok
Asia/Bangkok timezone

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Session

A3: Optics and Photonics

21 May 2018, 13:45
Ballroom 1

Ballroom 1

Conveners

A3: Optics and Photonics

  • Thawatchai Mayteevarunyoo

Presentation materials

There are no materials yet.

  1. 531. The fabrication and characterization of asymmetric gratings using the optical Talbot effect
    Thanarwut Photia (Department of Physics, Faculty of Science, Kasetsart University)
    21/05/2018, 13:45
    Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena
    Oral

    We fabricate asymmetric gratings, which have the ratio between the opening window and period or the opening fraction, f<0.5. The gratings were fabricated by using CNC milling machine to engrave a pattern on transparent acrylic sheets.The characterization of the gratings is performed with the optical Talbot effect. The results of the Talbot pattern, as well as the intensity along the...

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  2. 552. The design and development of a foot plantar pressure measuring device based on the mechanically induced long period fiber grating
    Mr Punthep Rattananupong
    21/05/2018, 14:00
    Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena
    Oral

    The aim of this study is to design and develop an alternative in-shoe foot plantar pressure measurement based on an optical fiber sensor. The foot plantar pressure distributions from human feet is considered to be important and essential information required by clinicians to plan a proper management on some foot problems of diabetic patients. Advantages of using the optical fiber include the...

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  3. 672. Backward third-harmonic pulse generation in a one-dimensional PIM/NIM structure
    Prathan Buranasiri
    21/05/2018, 14:15
    Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena
    Oral

    In this work, a set of couple-mode equations for describing a backward third harmonic generation (BTHG) in a one-dimensional periodic structure of positive-index material (PIM) layers and third-order nonlinear negative-index material (NIM) layers is analyzed using multiple-scale method. Due to the negative-index phase matching and band-edge field enhancement the intensities of backward...

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  4. 696. Effect of SILAR Techniques on Photovoltaic Properties of PbS Quantum Dot Sensitized Solar Cells
    Dr Witoon Yindeesuk (Department of Physics, King Mongkut’s Institute of Technology Ladkrabang)
    21/05/2018, 14:30
    Photonics and Optoelectronics
    Oral

    PbS quantum dots (QDs) have been received attention as a photosensitizer for quantum dot sensitized solar cells (QDSSCs) due to their narrow band gaps, quantum size effect, and multiple exciton generation (MEG). In this work, we prepared PbS QDSSCs by successive ionic layer adsorption and reaction method (SILAR) with PbS QDs deposited onto titanium dioxide (TiO$_2$), then the PbS QDs have been...

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  5. 727. Characteristics of fork fringes formed by two obliquely-incident vortex beams with different topological charge numbers
    Ms Suvipak choomdaeng (Department of Physics, Faculty of Science, Kasetsart University)
    21/05/2018, 14:45
    Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena
    Oral

    Optical vortex is a mode of light whose phase distribution varies as exp(il$\phi$), where m is called the topological charge of the vortex and $\phi$ is an azimuthal angle in the plane perpendicular to the propagating direction. The vortex beam of charge l carries an orbital angular momentum of lℏ and has its application in manipulating micrometer-sized particles. A common method to detect...

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  6. 769. Python-based Automatic Control System for Frequency-Response Measurement of the Quartz Tuning Fork
    Dr Tipsuda Chaipiboonwong (Department of Physics, Faculty of Science and Technology, Thammasat University, Thammasat University), Ms Tiwaporn Prasertsri (Department of Physics, Faculty of Science and Technology, Thammasat University, Thammasat University)
    21/05/2018, 15:00
    Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena
    Oral

    The quartz tuning forks (QTF) is a high quality factor (Q-factor) mechanical resonator and therefore high sensitivity to the surrounding environment. Owing to the piezoelectricity of the quartz, the compact driving system can be achieved by attached electrodes on the QTF. Therefore the QTF, attached with a sharp optical fiber or tungstein tip, is widely utillized as a shear force sensing...

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  7. 724. Characteristics of fork fringes formed by two obliquely-incident vortex beams with different topological charge numbers
    SJ Suvipak Chomdaeng
    Optics, Non-linear optics, Laser Physics, Ultrafast Phenomena
    Oral

    Optical vortex is a mode of light whose phase distribution varies as exp(il$\phi$), where m is called the topological charge of the vortex and $\phi$ is an azimuthal angle in the plane perpendicular to the propagating direction. The vortex beam of charge l carries an orbital angular momentum of lℏ and has its application in manipulating micrometer-sized particles. A common method to detect...

    Go to contribution page
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