Bulletin of the American Physical Society
2014 Annual Meeting of the Mid-Atlantic Section of the APS
Volume 59, Number 9
Friday–Sunday, October 3–5, 2014; University Park, Pennsylvania
Session E7: Applied Physics / Fluid Dynamics |
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Chair: Joseph Kulik, Pennsylvania State University Room: Life Sciences Building 012 |
Saturday, October 4, 2014 3:30PM - 3:42PM |
E7.00001: Single photon detection with an actively quenched light emitting diode David Starling, Blake Burger, Edward Miller, Joseph Zolnowski, Joseph Ranalli Light emitting diodes (LEDs) have applications in many industries for illumination. However, the LED is not limited only to the generation of light. In this presentation, we demonstrate and analyze the LED for use as a single photon detector and make comparisons to its more costly relative, the avalanche photodiode. We show that LEDs can operate in reverse bias for single photon detection and can even be actively quenched to improve maximum count rates. However, typical LEDs suffer from a few notable drawbacks including long reset times and poor efficiency. Despite these drawbacks, the LED provides a low cost alternative to the avalanche photodiode for use in an advanced lab setting or for photon counting experiments. [Preview Abstract] |
Saturday, October 4, 2014 3:42PM - 3:54PM |
E7.00002: Indigo -- A biodegradable, low-cost organic semiconductor for device applications Zhengjun Wang, Konstantinos Sierros, Dimitris Korakakis, Mohindar S. Seehra In recent years, the use of organic semiconductors for device applications has attracted considerable attention. In this paper, recent results on indigo-based devices will be reviewed. Indigo is a biodegradable and a low-cost semiconductor with band gap of 1.7 eV and its use in field effect transistors and circuits has been recently reported [1]. In our work, we have recently developed indigo-based write-once-read-many-times (WORM) memory device [2]. Details of the results and their interpretation in terms of interfacial dipoles will be presented. \\[4pt] [1] M. Irimia-Vladu et al, Adv. Mater. 24, 375 (2012).\\[0pt] [2] Z. Wang, K. Sierros, D. Korakakis, and M. S. Seehra, Appl. Phys. Lett. (to be submitted). [Preview Abstract] |
Saturday, October 4, 2014 3:54PM - 4:06PM |
E7.00003: Analysis the physical principle of Fog and haze formation Yongquan Han The fog and haze formation is the result of natural, science and technology, human activity. the reason of The fog and haze are : combustion, vehicle exhaust, dust, but the the second outbreak of PM2.5 reasons are complex, including some chemical reaction. In fact, the reason is: 1, The accumulation of the fog and haze, namely the results of combustion, automobile exhaust, dust effects. 2, The fog and haze particles upward momentum -- hot air upward movement, wireless communication, the electromagnetic wave net sports. 3, no sustained wind. Three conditions have erupted persistent cause the fog and haze weather, indispensable, the second outbreaks of Pm2.5 are above these three conditions together of the results. [Preview Abstract] |
Saturday, October 4, 2014 4:06PM - 4:18PM |
E7.00004: Rectenna with broadband operation from near-infrared to visible Raymond Wambold, James Chen, Michael Phillips, Zachary Sinisi, Gary Weisel, Darin Zimmerman, Brian Willis, Paul Cutler, Nicholas Miskovsky We describe a rectifying antenna (rectenna) for the efficient collection and conversion of solar radiation into electricity. Engineered for broadband absorption, an array of rectennas employs geometric asymmetry, resulting in a self-biased junction that enables a rectified DC tunneling current. To achieve junction gaps within the tunneling regime, we use selective atomic-layer deposition (ALD) applied to devices created using standard electron-beam lithography. We demonstrate the tunability of the optical extinction response in these devices and show that the resonance peak is progressively red-shifted with increasing cycles of ALD, consistent with optical antenna theory. We compare our optical extinction measurements to simulation results and describe electro-optical experiments that are planned for the near future. [Preview Abstract] |
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