Browsing by Author "Eknoyan, Ohannes"
Now showing items 1-20 of 68
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Nominanda, Helinda (Texas A&M University, 2008-10-10)n-channel and p-channel amorphous-silicon thin-film transistors (a-Si:H TFTs) with copper electrodes prepared by a novel plasma etching process have been fabricated and studied. Their characteristics are similar to those ...
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Xia, Xin (2012-07-16)Arsenic trisulfide (As₂S₃) waveguide devices on lithium niobate substrates (LiNbO₃) provide a set of compact and versatile means for guiding and manipulating optical modes in infrared integrated optical circuits, including ...
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Chen, Qi (2014-08-04)Arsenic trisulfide (As_(2)S_(3)) waveguides on lithium niobate (LiNbO_(3)) substrate have a wide variety of applications in both near-infrared (near-IR) and mid-infrared (mid-IR). As an amorphous material, As_(2)S_(3) has ...
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Zhou, Yifeng (2014-12-03)Chalcegenide glass material, such as amorphous As2S3, is an ideal candidate material to be integrated onto a much lower refractive index substrate and used as an all-optical active device. The As2S3 glass is with wide ...
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Kim, Ryoung-Han (Texas A&M University, 2006-04-12)Bragg grating reflectors etched in amorphous silicon overlay films have been integrated with Ti:LiNbO3 optical waveguides. With a 12.5 mm long grating segment and an etch depth of ~ 93 nm in a 105 nm-thick silicon film, a ...
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Wang, Xin (2014-11-20)In this dissertation, a novel design platform with arsenic tri-sulfide (As2S3) on titanium-diffused lithium niobate substrate (Ti:LiNbO3) is introduced to provide physical foundation for integrated optical device applications. ...
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Bravo, Tyler Ernest (2017-04-27)The design of a full etch, constant pitch grating coupler with upper oxide cladding is documented and analyzed for coupling to the dominant TE mode of a waveguide on a commercially available SOI platform at 1550nm. A high ...
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Liu, Yuxiao (2015-11-17)Solar energy, especially through the use of photovoltaic cells, is a promising sustainable energy source for human race. III-V multijunction photovoltaic cells with over 40% confirmed efficiency are among the best candidates ...
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Shrestha, Sebina (2015-07-28)Both morphological and biochemical changes occur in a diseased tissue. As a result, tissue optical response changes with the progression of disease. A single optical imaging modality can assess either morphological or ...
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Zhang, Shumao (2017-11-07)The zirconium-doped hafnium oxide (ZrHfO) high-k thin film has excellent gate dielectric properties, such as a higher crystallization temperature, a lower defect density, and a larger effective k value. As a promising ...
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Adams, Donald Benjamin (2011-10-21)Coherent optical signal processing systems typically require dynamic, low-loss phase changes of an optical signal. Waveform generation employing phase modulation is an important application area. In particular, laser radar ...
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Taylor, Justin K. (2010-07-14)Fiber Fabry-Perot Interferometers (FFPI) are optical sensors which can be used to measure changes in stress or temperature, but efforts continue to improve them. Calculations show that the response can be dramatically ...
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Zhang, Chen (2017-01-04)In this dissertation, design, fabrication and measurement of arsenic trisulfide (As2S3) grating couplers have been demonstrated on both bulk lithium niobate (LiNbO3) substrate and thin film LiNbO3. Photonic design tools, ...
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Ali, Javed (2017-07-11)LLithium niobate presents a good choice for integrated optics in optical communications and networks applications. Titanium diffused waveguides in lithium niobate are low loss and have a high coupling efficiency with single ...
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Snider, William (2012-10-19)Microring resonators are a fundamental building block for integrated optical filters, and have both modulation and waveform generation applications. A hybrid chalcogenide (As2S3) on titanium diffused (Ti:LiNbO3) waveguide ...
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Shin, Yong-Wook (2009-05-15)A polarization-independent electro-optically tunable add/drop filter utilizing non-polarizing novel relaxed beam splitters has been developed in LiNbO3 at the 1.55μm wavelength regime. The operation of this filter is based ...
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Cho, Yong Hee 1976- (2011-05-06)In this work we apply the methods of band structure calculation combined with self-consistent treatment of the light-matter interaction to a variety of problems in bulk semiconductors and semiconductor heterostructures as ...
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Bhatranand, Apichai (Texas A&M University, 2005-11-01)The use of optical feedback for improving response linearity of electrooptic light modulators has been investigated. The modulator is configured as a straight channel waveguide flanked by electrodes in a lithium niobate ...
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Kim, Changdong (Texas A&M University, 2006-04-12)Analysis and experimental results on a polarization independent electrooptic matched filter (EMF) with a center wavelength of 1.53 μm are reported. The EMF utilizes electrooptic phase-matched TE↔TM conversion ...
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Lee, Jong-Seo (Texas A&M University, 2004-09-30)All-fiber multireflector spectral filters which have potential application in optical communications have been investigated experimentally. These multireflector etalons were produced by aligning equal-length fiber sections ...