Conveners
A3: Optics and Photonics
- Apichart Pattanaporkrattana
- Nattaporn Chattham
This paper reviews recent progress in the digital holographic 3D imaging spectrometry. The principle of this method is a marriage of incoherent holography and Fourier transform spectroscopy. Review includes principle, procedure of signal processing and experimental results to obtain a multispectral set of 3D images for spatially incoherent, polychromatic objects.
Quantum dots present discreet quantum states and appear as artificial atoms in the solid state. Like an atom, a quantum dot can emit single photons, or polarization entangled photon pairs. Numerous potential applications rely on the control of the spontaneous emission of single quantum dots embedded in optical microcavities. For example, the regime of spontaneous emission enhancement (Purcell...
This study has focused the design, development and demonstration of a frequency-doubled 532 nm Nd:YVO4 laser pumped by solar light. The solar pumped laser is consisted of the optically contracted Nd:YVO4 crystal and KTP crystal with a system of laser mirrors deposited onto crystal sides. The design is aimed to achieve the laser emission using the direct end-pumping approach. In addition, the...
Silicon-based photonics has generated a strong interest in recent years, mainly for optical telecommunications and optical interconnects in integrated circuits. The main rationales of silicon photonics are the reduction of photonic system costs and the increase of the number of functionalities on the same chip combining photonics and electronics. Waveguide-integrated silicon...
A dual wavelength laser system providing emissions of 1064 nm and 532 nm was developed for cleaning applications. In this study, cleaning of surface layers of paints with the dual wavelength laser system was demonstrated. The experiments combined with an on-line monitoring technique were carried out to investigate the removal various paint types and thicknesses. The results reveal that the...
In this research, we describe the construction of a compact transmission Raman spectroscopy that has been developed for on-site determination of chemical analysis. The system consists of an inexpensive green laser pointer emitting less than 20 mW of 532 nm radiation used for excitation, a notch filter for blocking light around 532 nm and a portable spectrometer (Avantes, AvaSpec-ULS3648 ) for...
Heart rate monitoring via optically remote noncontact technique was reported in this research. A green laser (5mW, 532 ± 10 nm) was projected onto the left carotid artery. The reflected laser light on the screen carried the deviation of the interference patterns. The interference patterns were recorded by the digital camera (Canon EOS 1100D).The recorded videos of the interference patterns...
A stacked fishnet metamaterial with a unit cell comprising a metallic hole-array layer and an insulator layer has been expected to exhibit hyperbolic dispersion. Here, we propose new closed-form formulae of effective parameters of the stacked fishnet metamaterial working at long-wavelength regime. These simple effective parameters are derived by applying the coupled-mode analysis to obtain the...
The anti-reflective (AR) coatings have been regarded as one of the promising options to improving an efficiency of light transmission. In this research, we design the ultra-high anti-reflective layer structure. By using the specification properties of 1D photonic crystal, the periodical stack layer of tantalum pentoxide (Ta$_2$O$_5$) and molybdenum disulfide (MoS$_2$) in borosilicate glass...
