Yindeesuk, Witoon
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Preferred name
Yindeesuk, Witoon
Alternative Name
Yindeesuk, W.
Main Affiliation
Email
witoon.yi@kmitl.ac.th
9 results
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Item type:Publication, Rhodamine 6G and Au–Pd core–shell nanorods: Fluorescence enhancement for detection of mercury(2018-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Backward Third-Harmonic Pulse Generation in a One-Dimensional PIM/NIM Structure(2018-12-19); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optical properties of Mn-doped CdS thin films grown by the SILAR method(2018-12-19) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study of structural and optical properties of PbS thin films(2018-01-01); This research aimed to synthesize lead sulfide (PbS) thin films on glass slides using the successive ion layer absorption and reaction (SILAR) method. We studied the optical properties and structure of PbS thin films by changing the number of dipping cycles and the concentration of precursor solution. The results of this experiment show that different conditions have a considerable influence on the thickness and absorbance of the films. When the number of dipping cycles and the concentration of the solution are increased, film thickness and absorbance tend to become higher. The xrays diffraction pattern showed all the diffraction peaks which confirmed the face center cubic and the structure of PbS had identified. Grain size computation was used to confirm how much these conditions could be affected. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Digital holography system for undergraduate student laboratory(2015-01-01); ; Yoshimori, K.In this paper, we discuss the digital holography (DH) experiment in our optical and communication laboratory course for undergraduate students at Physics department, KMITL. The purposes of DH experiment are presenting our students the meaning and advantage of DH and its applications. The Gabor configurations of in-line DH has been set up for recording a number of samples, which were placed on different distances, simultaneously. Then, the images of all objects have been numerical reconstructed by using computer. The students have been learned that all of reconstructed images have been got from only one time recording, while using the conventional recording technique, sharp images of different objects have been gotten from different recording time. The students also have been learned how to use DH technique for investigation some different kinds of samples on their own of interested such as a human hair or a fingerprint. In our future work, our DH system will be developed to be a portable apparatus for easily showing to children in different areas. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Imaging enhancement of digital holography using photorefractive effect(2015-01-01); ; Yoshimori, K.In this research, two-wave coupling in photorefractive lithium niobate crystal has been used to do imaging enhancement of digital holography (DH) system. The image bearing beam of in-line DH system has been incident and interfered with a reference beam that was emerged from the same laser on a LiNbO<inf>3</inf> crystal. With certain angles between both beams, the energy of the reference beam was transferred to the image bearing beam then resulted the enhancement of the reconstructed image of the DH system. By using the suitable intensity of laser beam with a right PR crystal, the image from an in-line DH imaging system would be improved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Enhancement of backward third-harmonic generation in a one-dimensional PIM/NIM periodic structure(2018-09-01); A numerical simulation is reported for backward third-harmonic generation (BTHG) in a one-dimensional periodic structure containing a stack composed of positive-index material (PIM) and negative-index material (NIM). A multiple-scale method is used to formulate a completed set of coupled-mode equations with inhomogeneous higher-order nonlinear terms for both electric and magnetic fields. The coupled equations are numerically solved to simulate output third-harmonic frequency pulses and their conversion efficiencies by a fast Fourier transform–pulse propagation method. Finally, the numerical results validate the idea that using a combination of the negative-index phase-matched condition, which is created by engineering the dispersive property of the NIM layer, and local field enhancement, which is created by arranging PIM and NIM layers in an optimal periodic fashion, yields a dramatic enhancement of BTHG conversion efficiency. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of SILAR Techniques on Photovoltaic Properties of PbS Quantum Dot Sensitized Solar Cells(2018-12-19); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Studies of concentration dependence of the fluorescent quantum yield from rhodamine 6G and Au–Pd core–shell nanorods, using a response surface methodology(2017-01-01); ; We have applied a response surface approach to study the fluorescence quantum yield (FQY) of rhodamine 6G (Rh6G) mixed with Au–Pd core–shell nanorods (Au–Pd NRs). The FQYs have been measured for the Rh6G concentrations varying from 3.53×10<sup>–7</sup> to 1.70×10<sup>–6</sup> mol/L and the concentrations of Au–Pd NRs from 7.06×10<sup>–6</sup> to 1.36×10<sup>–4</sup> mol/L. Our experimental results testify that the FQY depends notably on the proportions of Rh6G and Au–Pd NRs. A specific relationship between the FQY and the concentrations has also been confirmed by a response surface plot. It is found that the discrepancy between the experiment and the calculations is less than 2%.