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Physical Sciences and Mathematics Commons™
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- Arduino (Programmable controller) (1)
- Hydrological instruments -- Design and construction (1)
- Kerr effect (1)
- Lasers (1)
- Multilayered thin films -- Optical properties -- Mathematical models (1)
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- Near-field microscopy (1)
- Optoelectronic devices -- Materials -- Mathematical models (1)
- Photonics -- Mathematical models (1)
- Piezometer (1)
- Semiconductor lasers (1)
- Ultrasonic equipment -- Technological innovations (1)
- Water levels -- Measurement (1)
- Zinc oxide -- Electric properties (1)
- Zinc oxide thin films (1)
Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Predicting The Optical Response Of A Generalized Multilayer Thin Film, A.J. Lawrence, Erik J. Sánchez
Predicting The Optical Response Of A Generalized Multilayer Thin Film, A.J. Lawrence, Erik J. Sánchez
Student Research Symposium
The contrast mechanism in Kerr imaging is the apparent angle through which the plane of polarization is rotated upon reflection from a magnetic surface, and this can be calculated for a well characterized surface given the polarization state of the incident light. As in traditional optical microscopy, the spatial resolution is limited by diffraction to roughly half the wavelength of the illumination light. The diffraction limit can be circumvented through the use of near-field scanning optical microscopy, in which the illumination source is an evanescent field at the tip of a tapered optical fiber. The complication in merging these two …
Zinc Oxide Random Laser Threshold Enhancement Via Addition Of Passive Scatterers, Zachariah M. Peterson, Rolf Könenkamp, Robert Campbell Word
Zinc Oxide Random Laser Threshold Enhancement Via Addition Of Passive Scatterers, Zachariah M. Peterson, Rolf Könenkamp, Robert Campbell Word
Student Research Symposium
Zinc oxide (ZnO) is a wide bandgap n-type semiconductor with a variety of optical and electrical applications and many methods of fabrication. Strong optical scattering and photoluminescence from ZnO nanoparticles and films makes the material an ideal candidate for a random laser. Previous studies have shown both incoherent and coherent random lasing from ZnO films and particles agglomerations. When used as a passive scatterer in a laser dye gain medium, the addition of ZnO has been shown to improve the threshold for lasing. By combining active scattering ZnO with a passive scatterer, MgO, we show here that the lasing threshold …
Open-Source, Low-Cost Sensor For Custom Water Level Monitoring In Observation Wells And Piezometers, Leslie A. Mowbray
Open-Source, Low-Cost Sensor For Custom Water Level Monitoring In Observation Wells And Piezometers, Leslie A. Mowbray
Student Research Symposium
Many commercial sensors exist for monitoring water levels in piezometers and wells. However, these sensors tend to be expensive and contain proprietary hardware and software that make customization by users difficult. Recently, the vast open-source Arduino programming community has enabled the development of highly customizable, low cost sensors with the precision and accuracy needed for scientific research. Here, an ultrasonic distance sensor is developed to monitor the water level in a 2” piezometer with sub-centimeter resolution, powered by a lead-acid battery and solar cell to record sub-minute time increments for duration of days to weeks. This sensor was developed specifically …