The objective of this work is to design and build an imaging system of time domain optical coherence tomography (TD-OCT) with a resolution about 3 micrometers in all directions. Our TD-OCT system was setup based on Michelson interferometer. The depth-resolution can be improved by applying a broadband supercontinuum pulse laser as light source. The lateral-resolution can be improved by using...
This research consisted of three objectives (1) to study the basic principles of magnetic rollers (2) to construct a demonstration about magnetic force using the motion of magnetic rollers, and (3) to analyze the motion of the magnetic rollers using high speed video analysis techniques. Each magnetic roller is constructed from Neodymium permanent magnets, rechargeable batteries, and aluminum...
We study the influence of temperature on laser diode inside an external cavity diode laser (ECDL) with a cateye reflector mirror type. This type of ECDL uses a focused beam of laser directed to an external mirror and reflected back to the laser to adjust the laser frequency with the variation of the cavity length. The input current and temperature of the ECDL can also be adjusted to a proper...
Fourier Transform Infrared (FTIR) spectroscopy is a technique to indirectly measure spectrum of electromagnetic wave over a broad range. It is based on low-coherence interferometry. The short coherence of a broadband light is measured in the form of an interferogram and then Fourier transformed to obtain a spectral content of light. FTIR has been used to probe interaction between matters and...
Combining photonics with electronics is identified as one of the viable solutions to accommodate data traffic increase in an energy-efficient manner for various applications such as optical interconnect, quantum computing, sensing, and environment with favorable price-volume curve. Therefore, photonic-electronic integration on Silicon (Si) has shown strong potential to become the new...
Quantum computers offer algorithms that can potentially solve impactful problems that classical algorithms are inefficient or incapable. As a classical network enhances classical computing performance, a quantum network can do so with quantum computers, and it has become one of the active research topics in quantum communication. It is how to connect two or more quantum objects (qubits) to...
Lead halide perovskite quantum dots (QDs) have attracted much attention for an optoelectronic application. Size dependence properties of QDs have been extensively studeied Herein, formamidinium lead halide (FAPbBr3) QDs have been successfully synthesized at room temperature under an open-air atmosphere. A different particle sizes of FAPbBr3 were rapid separated by using a differential...
