Recent research on organic and polymeric semiconductors is directed towards highly ordered molecular structures in solid states. Through molecular design and engineering, it has been shown possible to control the molecular orientation and processing conditions of these materials as well as fine tuning their energy levels and color emissions. Thin film field-effect transistors (FETs) have been used as testing structures for evaluating the semiconducting properties of new organic semiconducting materials. Performance similar to amorphous-Si can now be realized with some organic materials. Large-scale integration of organic transistors has been demonstrated. In addition, several low cost novel non-lithographic patterning methods have been developed, which resulted in the first flexible electronic paper. The field-effect transistor device structure can also be utilized as a means to induce a great amount of charge carriers in organic thin films through the gate field. Using this type of structure, superconductivity was observed in a highly ordered conjugated regioregular poly(3-hexylthiophene).
Plastic optical fiber (POF) has long been seen as a potential medium for implementing simple, very low cost optical links, but has not yet found significant application in data communication. In the near future, this situation is likely to change, as a new generation of POF with dramatically improved optical properties becomes commercially available. Unlike conventional POF, the new POF is based on amorphous perfluorinated polymers that are transparent in the near infrared. In order to develop useful fibers based on these new polymer materials, it has been necessary to better understand their fundamental optical properties, and to develop methods for manufacturing low-loss fiber. Since the available manufacturing methods typically result in graded-index POF's with very non-ideal index profiles, the possibility of severe bandwidth limitations has long been a concern. In addition, significant improvements in connection loss will be required to support high-speed systems. In this paper, we describe techniques that we and others have developed to eliminate or overcome these obstacles.
Conference Committee Involvement (8)
Active Photonic Materials V
25 August 2013 | San Diego, California, United States
Active Photonic Materials IV
22 August 2011 | San Diego, California, United States
Active Photonic Materials III
2 August 2010 | San Diego, California, United States
Active Photonic Crystals II
13 August 2008 | San Diego, California, United States
Active Photonic Crystals
28 August 2007 | San Diego, California, United States
Tuning the Optic Response of Photonic Bandgap Structures III
14 August 2006 | San Diego, California, United States
Tuning the Optical Response of Photonic Bandgap Structures II
31 July 2005 | San Diego, California, United States
Tuning the Optical Response of Photonic Bandgap Structures
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