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481
Integration of InGaAs MOSFETs and GaAs/ AlGaAs lasers on Si Substrate for advanced opto-electronic integrated circuits (OEICs)
Published 2019“…The laser and transistor layers were grown on the Si substrate by molecular beam epitaxy (MBE) using direct epitaxial growth. …”
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Journal Article -
482
Quantitative measurement of displacement in photopolymer layers during holographic recording using phase shifting electronic speckle pattern interferometry
Published 2016“…It was observed that the displacement profile is Gaussian and resembles to the profile of the recording beam. We observed an increase in shrinkage from 2 μm at 20 seconds of recording to 7.5 μm after 120 seconds of recording. …”
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Conference Paper -
483
Antenna-enhanced and polarization sensitive photoresponse in arrays of silicon P–i–N nanowires
Published 2013“…Quantitative characterization of these resonances was performed by spectral and polarization-resolved photocurrent measurements on gratings with N = 500, 200 and 100 nanowires, aided by electron beam-induced current measurements, and in excellent agreement with electromagnetic scattering theory. …”
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Journal Article -
484
Damage identification by using a self-synchronizing multipoint laser doppler vibrometer
Published 2018“…In this paper, a damage detection technique is proposed using a self-synchronizing multipoint LDV. Multiple laser beams with various frequency shifts are projected on different points of the object, reflected and interfered with a common reference beam. …”
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Journal Article -
485
Cylindrical surfaces enable wavelength-selective extinction and sub-0.2 nm linewidth in 250 μm-gap silicon Fabry–Pérot cavities
Published 2013“…Our approach consists of providing a solution to the main loss mechanism in conventional FP cavities related to the expansion of the Gaussian light beam after multiple reflections inside the cavity. …”
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Journal Article -
486
A signal through the noise: accurate determination of hydrogen atom positions in crystal structures and optimisation of Laue neutron diffraction methods
Published 2021“…This focuses on:</p> <p>Recommendations for the efficient collection of Laue neutron data, in order to optimise the data set completeness and awarded beam-time; strategic considerations for how to best answer the scientific question(s) at hand in a Laue neutron experiment, whilst planning against future contingencies; improving methods for crystal packing and shipping, particularly for air and moisture sensitive materials; discussing issues arising from ice forming on the crystal during a Laue neutron diffraction experiment, and methods for minimising this problem; more effectively modelling disorder using ring shapes, in the crystallographic refinement package CRYSTALS; providing rationale for Laue neutron specific checkCIF comments.…”
Thesis -
487
Polymeric composites for powder-based additive manufacturing : materials and applications
Published 2020“…As one of the most important categories in the additive manufacturing (AM) field, powder-based techniques, such as selective laser sintering, electron beam melting and selective laser melting, utilize laser or electronic beams to selectively fuse polymeric, metallic, ceramic or composite powders layer-by-layer into desired products according to their computer-aided design models. …”
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Journal Article -
488
Additive manufacturing of NiTi shape memory alloys using pre-mixed powders
Published 2019“…This work presents a comparative study on the in-situ alloying of NiTi shape memory alloys (SMAs) by directed energy deposition (DED), selective laser melting (SLM) and selective electron beam melting (SEBM) processes using pre-mixed Ni-Ti powders. …”
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Journal Article -
489
First results on a new PIAA coronagraph testbed at NASA Ames
Published 2017“…Fortunately, an efficient coronagraph called the Phase Induced Amplitude Apodization (PIAA) coronagraph has been maturing and may enable Earth-like planet imaging for such small telescopes. …”
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Presentation -
490
Optimizing resource allocation in large communications satellite constellations
Published 2024“…Several approaches have been proposed to deal with the complexity of the added flexibilities at the spacecraft level. …”
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Thesis -
491
Nanostructured materials for electrochemical carbon dioxide reduction and biosensing
Published 2021“…Strategies of nanostructure synthesis can be diverse, but a fast, scalable, and cost-effective method for 1D material fabrication in one step has not been reported yet. In this thesis, a room temperature ultrasonic nanoimprinting technique for 1D metal nanostructure fabrication has been developed. …”
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Thesis-Doctor of Philosophy -
492
Developing a portable, high-speed, low-cost desktop photoacoustic tomography imaging system
Published 2019“…Usually Nd:YAG-OPO laser is bulky, heavy and needs an optical table to deliver non-fluctuating laser beam and it needs external op- tics (reflectors/prisms) to direct the laser beam onto the sample (there are portable OPO lasers from OpoTek, EKSPLA, and various other companies that do not require optical table but they are more expensive than conventional Nd:YAG-OPO lasers). …”
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Thesis -
493
Measurement of the background in the CMS muon detector in 𝑝𝑝 -collisions at √𝑠 =13 TeV
Published 2024“…The CMS detector, including its muon system, has been operating at the CERN LHC in increasingly challenging conditions for about 15 years. …”
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Article -
494
Robot programming using augmented reality
Published 2014“…The two RPAR methodologies developed in this research have been applied to a number of case studies and the various related issues have been discussed.…”
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Thesis -
495
Modular Morphing Lattices for Large-Scale Underwater Continuum Robotic Structures
Published 2024“…The first is a morphing beam snake-like robot that can generate thrust at specific anguilliform swimming parameters. …”
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Article -
496
Multi-bounce Returns for Specular Surface Mapping from Consumer-grade Flash LiDAR
Published 2024“…Consumer-grade LiDAR multi-beam flash LiDAR is challenging with its coarse resolution, co-located sensors, and multiplexing setup. …”
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Thesis -
497
Interpretation of an anomalous peak in low-temperature photoluminescence measurements of bulk GaAs[sub 1−x]N[sub x] on GaAs
Published 2013“…Low-temperature 10 K photoluminescence measurements of GaAs1−xNx epitaxial layers grown on GaAs reveal an anomalous second peak in solid-source molecular beam epitaxy. Rapid thermal annealing RTA of a specific GaAsN sample reveals a lower energy peak which redshifts and a higher energy peak which blueshifts under increasing annealing temperature. …”
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Journal Article -
498
Study of a 1 eV GaNAsSb photovoltaic cell grown on a silicon substrate
Published 2014“…We report the performance of a 1 eV GaNAsSb photovoltaic cell grown on a Si substrate with a SiGe graded buffer grown using molecular beam epitaxy. For comparison, the performance of a similar 1 eV GaN0.018As0.897 Sb 0.085 photovoltaic cell grown on a GaAs substrate was also reported. …”
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Journal Article -
499
Low temperature grown GaNAsSb : a promising material for photoconductive switch application
Published 2013“…The GaNAsSb layer was grown at 200 °C by molecular beam epitaxy in conjunction with a radio frequency plasma-assisted nitrogen source and a valved antimony cracker source. …”
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Journal Article -
500
Large-area atomic layers of the charge-density-wave conductor TiSe2
Published 2020“…However, the syntheses of monolayer and large-area 2D CDW conductors can currently only be achieved by molecular beam epitaxy under ultrahigh vacuum. This study reports the growth of monolayer crystals and up to 5 × 105 µm2 large films of the typical 2D CDW conductor-TiSe2 -by ambient-pressure chemical vapor deposition. …”
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Journal Article