Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"Nanoimprint lithography"”.
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Nanoimprint lithography for light trapping applications in solar cells
In this thesis, substrate conformal imprint lithography (SCIL) process is adopted to fabricate efficient light trapping structures for thin-film solar cells. The SCIL process can achieve economical and large area patterns with high fidelity sub-micron resolution over non-planar surfaces without …
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Nanoimprint lithography for light trapping applications in solar cells
In this thesis, substrate conformal imprint lithography (SCIL) process is adopted to fabricate efficient light trapping structures for thin-film solar cells. The SCIL process can achieve economical and large area patterns with high fidelity sub-micron resolution over non-planar surfaces without …
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The effects of feature geometry on simulating nanoimprint lithography
Nanoimprint lithography (NIL) is a method for fabricating nano-scale patterns by pressing stamps into viscous materials. A key barrier to industry adoption of NIL is the inability to predict whether a stamp will imprint successfully and how long the process should be run for. In this thesis, we …
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High Extinction Ratio Subwavelength 1D Infrared Polarizer by Nanoimprint Lithography
… of grating layers was conducted by using nanoimprint lithography. The samples were characterized by scanning electron microscopy. IR transmissions in transverse magnetic (TM) and transverse electric (TE) modes were measured by Fourier transform infrared spectroscopy (FTIR).
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Pathways for quantum dot optoelectronics fabrication using soft nanoimprint lithography
Nanoimprint lithography is a low-cost, high-throughput alternative to traditional serial nanolithography technologies. Here it is explored for application in the optoelectronics area. A variant of NIL using a flexible polymeric mold, termed “soft NIL” is used to create and study quantum dot arrays …
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The implementation of nanoimprint lithography for the fabrication of patterned magnetic media
… technology is needed. Research completed with nanoimprint lithography demonstrates that it can be used to fabricate patterned magnetic media. Several patterns of magnetic media were fabricated with densely packed sub-20-nm features that would produce an areal bit density of at least 258 …
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Towards a universal ultra-thin fluorinated diamond-like carbon coating for nanoimprint lithography imprinters
<p>Nanoimprint lithography (NIL) has proven to achieve arbitrary, nanoscale features, over large areas, without the use of costly step-and-repeat UV lithography tools. The fidelity of the imprinted pattern depends on the elimination of the adhesion between the imprinted polymer and the imprinter …
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A patterning process utilizing a nanoimprint lithography for fabrication of planar perpendicular patterned magnetic media
<p>This thesis describes the results of applied research in the area of patterned magnetic media. Current magnetic media is pushing the physical limits of magnetic bits by compressing them into very small spaces - a process that will eventually be hampered by the superparamagnetic effect. The …
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Economic potential of high density data storage implemented by patterned magnetic media technology
… bit. The basic fabrication approach is to use lithography to pattern the magnetic materials on the platter. However, patterned media requires well-ordered nanoarrays with dimensions less than 25 nm, which challenges the state-of-art lithography technologies. This M. Eng. project focuses on …
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Fabrication, design, and analytical applications of nanostructured plasmonic crystals
… of electronics and photovoltaics. Soft nanoimprint lithography provides inexpensive and versatile replication method to generate uniformly ordered and defined nanostructures over large areas. Plasmonic crystals consisting of squared arrays of nanoholes with high fidelity are fabricated …
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Modeling and controlling topographical nonuniformity in thermoplastic micro- and nano-embossing
… Yet neither hot micro-embossing nor thermal nanoimprint lithography will be fully adopted without efficient numerical techniques for simulating these processes. This thesis contributes a computationally inexpensive approach to simulating the embossing of feature-rich patterns into …
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Synthesis of Nanomaterials for Optical and Catalytic Studies
… applications also propels the investigation on nanoimprint lithography (NIL) to design a photocatalytic reactor.
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Commercialization of bit-patterned media
… the stringent requirement of high-resolution lithography, high production cost is inevitably the major challenging problem. If a low-cost mass fabrication scheme is available, bit-patterned media will be an innovative way in hard disk technology to achieve a storage density beyond 1 Tb/in². …
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Fabrication of extremely smooth blazed diffraction gratings
… such as optical telecommunications, lithography, and spectroscopy. Special interest has been placed on blazed diffraction gratings for their ability to enhance diffraction intensity at the specular reflection angle off the blazed facets. In this thesis I will report a novel process …
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Design of nanomanufacturing systems
… for a nano-scale process such as Dip Pen Nanolithography and Nanoimprint Lithography. Accordingly this work presents methods for designing nanomanufacturing systems, including the development of new technology to fulfill the unique performance requirements of nanomanufacturing processes. …
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Materials and strategies for flexible, stretchable and large area photonic devices
… fabrication techniques such as soft nanoimprint lithography and nanotransfer printing etc. One example is fabricating flexible, large area, multilayerd negative index metamaterials which are unattainable with conventional fabrication techniques and have high figure of merit in the …
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Design and development of distributed feedback transistor lasers
… AlGaAs confining layers using soft photocurable nanoimprint lithography. The device produces continuous wave laser operation with a peak wavelength of 959.75 nm and threshold current of 13 mA operating at -70 °C. For devices with cleaved ends a side-mode suppression ratio greater than 25 dB has …
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Frequency Selective Detection of Infrared Radiation in Uncooled Optical Nano-Antenna Array
… is also very tedious involving multiple complex lithography steps. In this study, we designed an optical nano-antenna array based detector with narrow frequency band of operation. The structure consists of a two-element antenna array comprised of a perforated metallic hole array coupled with an …
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Nanofabrication towards biophotonics
… including Focused Ion Beam, Electron Beam Lithography, Nanoimprint lithography, Template stripping and Phase Shift Lithography. Focused Ion Beam was chosen to fabricate the nanohole arrays due to its suitability for rapid prototyping and it’s relatively low cost. In chapter 2 the …
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Fabrication of site-controlled quantum structures for optoelectronic devices
… and explored by utilizing soft photocurable nanoimprint lithography (soft NIL) to create nanoscale patterns. The first is a bottom-up method which leads to the formation of “regrown QDs”. In this approach, high optical quality InAs QDs are regrown in designed nucleation sites over GaAs …
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