-
1021
Non-Destructive Material Characterization Methods /
Published 2023Get full text
Get full text
software, multimedia -
1022
Squeezing the Quantum Noise of LIGO below the Standard Quantum Limit
Published 2024“…The SQL applies when using uncorrelated photons or coherent light to measure the object, such as a laser beam. However, introducing quantum correlations through squeezed light, a technique called squeezing (Chapter 2), can circumvent this limit. …”
Get full text
Thesis -
1023
Growth of gallium nitride nanowires by low pressure chemical vapor deposition (LPCVD)
Published 2013“…Growth of III-Nitride nanowires on Si, which is the most commonly used substrate in microelectronic industry, using different growth techniques such as conventional Chemical Vapor Deposition (CVD), Metal Organic Chemical Vapor Deposition (MOCVD), and Molecular Beam Epitaxy (MBE) etc. have been explored. Low pressure chemical vapor deposition (LPCVD), which is widely used in Si wafer fabs, is of particular interest due to its low cost, ability to handle large size wafer and high throughput. …”
Get full text
Thesis -
1024
Ordered hybrid nanoneedle arrays for gas sensing
Published 2014“…In the present thesis, a novel ordered metal/silicon hybrid nanoneedle array is fabricated using an ion beam that patterns the metal/silicon substrate producing a pillar array followed by the self-organization of hybrid nanoneedles. …”
Get full text
Thesis -
1025
Surface plasmon resonance (SPR) enhanced biosensors
Published 2016“…The fabrication steps of the arrays were composed of electron-beam lithography and nano-imprint lithography. In comparison with the PAuNH array, the AuNH array offered higher field enhancement for fluorescence when only LSP was excited. …”
Get full text
Thesis -
1026
Two-dimensional transitional metal dichalcongenide heterostructures : interface optical properties
Published 2018“…In the hBN/TMDC/hBN heterostructure, e-beam induced e-h pairs can transfer to and be trapped in the middle TMDC layer, leading to increased recombination probability within the TMDC layer. …”
Get full text
Thesis -
1027
Novel heat treatment methodology for residual stress relieve of AlSi10Mg without compromise of mechanical strength
Published 2021“…Additive manufacturing (AM) has made the fabrication of complex parts possible which otherwise, would not have been possible with conventional subtractive manufacturing. Laser Beam Powder Bed (LBPB) Fusion, commonly known as Selective Laser Melting (SLM), is one of the methodologies in AM for metal fabrication. …”
Get full text
Thesis-Doctor of Philosophy -
1028
SPP/LSP coupled hybrid mode directed multi-functional surface-enhanced Raman system
Published 2013“…In the experiment, SPPs are excited by a tightly-focused radially polarized beam and interact with the nanospheres to generate the plasmon-hybrid-mode, exactly according to the second configuration aforementioned. …”
Get full text
Thesis -
1029
Hybrid lasers and modulator on silicon in the near- and mid-infrared region
Published 2017“…The lateral grating can be fabricated by CMOS-compatible inline lithography, which avoids the use of expensive and time-consuming electron beam lithography. The device works at room temperature with the single-side-suppression-ratio (SMSR) of 20 dB and the threshold current density is 1.54 kA/cm2. …”
Get full text
Thesis -
1030
Pulsed fiber laser at 1 μm wavelength region
Published 2017“…The optical-to-optical conversion efficiency of ~ 67% for the main amplifier and the 4σ beam quality (M2) of 1.7 is obtained. The limiting factors for high power YDPFLs (such as ASE, Stimulated Raman Scattering (SRS) and Stimulated Brillouin Scattering (SBS)) are cautiously studied and addressed. …”
Get full text
Thesis -
1031
Selected Problems of Solid Mechanics and Solving Methods /
Published 2024Get full text
Get full text
software, multimedia -
1032
Developments in THz Polaritonics: Towards Integrated Nonlinear THz Spectroscopy
Published 2024“…The optical pump light is focused onto the bevel, after which it refracts and becomes confined within the waveguide by total internal reflection. This allows the pump beam to repeatedly drive the generated THz field during its multiple back-and-forth traversals within the LN slab. …”
Get full text
Thesis -
1033
Developing metallic cathode for low-temperature solid oxide fuel cell applications
Published 2017“…To study the stability of metallic cathode, an interfacial structure characterization method, double cantilever beam delamination, was developed to determine the triple phase boundary structure for the thin-film electrode. …”
Get full text
Thesis -
1034
Investigations into femtosecond laser hybrid manufacturing for 3D power sources
Published 2021“…These VPGs are then demonstrated as active beam steering units and tuneable spectroscopic optical elements. …”
Get full text
Thesis-Doctor of Philosophy -
1035
A Brewster route to Cherenkov detectors
Published 2022“…Our angular-selective Brewster paradigm offers a feasible solution to implement compact and highly sensitive Cherenkov detectors especially in beam lines with a small angular divergence using regular dielectrics.…”
Get full text
Journal Article -
1036
Compositionally graded alloys fabricated using the laser powder bed fusion technique
Published 2023“…In this study, among the several available AM processes, the LPBF technique is selected to fabricate compositionally graded alloys, as it has higher spatial resolution and lower cost, compared to directed energy deposition (DED) and electron beam powder bed fusion (EBPBF). With three different LPBF setups and four alloy systems examined in this study, the following objectives are achieved: (i) screening out, from a large range of compositions, the alloys that are amenable to LPBF, (ii) examining the effects of the LPBF characteristics, e.g., rapid cooling rate, on the micro-/meso-structure and properties of the fabricated parts with varying chemical compositions, and (iii) evaluating the fabrication methods in terms of types of achieved gradation (stepwise or smooth), efficiency, and level of chemical segregation. …”
Get full text
Thesis-Doctor of Philosophy -
1037
Synthesis and characterization of Cu-Chalcogenide nanocrystals for potential applications in low-cost solar cells
Published 2013“…Since the opto-electrical properties of the NCs are highly dependent on the composition and crystal structure, X-ray diffraction, selected area electron diffraction, convergent beam electron diffraction and Raman spectroscopy were used to determine their crystal structure. …”
Get full text
Thesis -
1038
Design and analysis of passive phase shifters using controllable defected ground structures in 65nm CMOS technology for 77-81 GHz automotive radar
Published 2024“…Phased array radar is a low cost and promising technique to achieve high angular resolution by scanning a narrow beam in azimuth. The key enabler of a phased array radar is the phase shifter, which provides a progressive phase difference in each channel to achieve beamforming. …”
Get full text
Thesis-Doctor of Philosophy -
1039
Solution processed transition metal oxides selective contacts for Si heterojunction solar cells
Published 2021“…In this work, we have first prepared hole selective contacts using solution processed MoOx (s-MoOx) by spin-coating and physical evaporated MoOx (e-MoOx) by electron beam evaporator. The performance of the s-MoOx/Si HSC has been investigated and optimized, which has been demonstrated solar cell efficiency of 12.5% for s-MoOx/Si HSC that is comparable to efficiency of 13.3% for e-MoOx/Si HSC. …”
Get full text
Thesis-Doctor of Philosophy -
1040
Enhancing tensile and fatigue properties of additively manufactured alloys by post-processing heat treatment
Published 2022“…Amongst the different AM techniques, laser beam-powder bed fusion (LB-PBF) is the most abundantly investigated process due to its deep market penetration as well as the vast number of LB-PBF machine manufacturers. …”
Get full text
Thesis-Doctor of Philosophy