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201
Characterization of structural and optical properties of Zinc Oxide thin films
Published 2008“…Three dispersion models, namely, Sellmeier dispersion model, Cauchy model and Forouhi-Bloomer model, were used and evaluated to determine the optical constants of ZnO thin films below the energy band gap. On the other hand, two ellipsometric models, namely, two-phase model and three-phase point-by-point fit, were used to determine the optical constants above the band gap. …”
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Thesis -
202
INSBN alloy and INSB nanowire grown by metal-organic chemical vapor deposition
Published 2014“…The first part of this project deals with growth and characterization of the InSb1-xNx alloys, aiming to reduce the band gap of the alloy. InSb epitaxial layers on InSb substrate were firstly prepared by MOCVD and then the InSbN alloys. …”
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Thesis -
203
Design of voltage-controlled oscillators and frequency dividers for 60 GHZ wireless communication applications
Published 2015“…In this thesis, firstly, the Q enhancement of multiple-coupled LC-tank has been investigated, mainly for the purpose of designing VCOs with low phase noise under low power consumption for 60 GHz transceivers with a multi-conversion super-heterodyne architecture. Secondly, a Ku-band VCO using dual LC-tanks and transformer-based feedback technique is designed. …”
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Thesis -
204
Pathways of energy transfer in LHCII revealed by room-temperature 2D electronic spectroscopy
Published 2014“…Two-dimensional electronic spectroscopy has been used to study energy transfer dynamics in LHCII trimers from the chlorophyll b Qy band to the chlorophyll a Qy band. Observing cross-peak regions corresponding to couplings between different excitonic states reveals partially resolved fine structure at the exciton level that cannot be isolated by pump–probe or linear spectroscopy measurements alone. …”
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Journal Article -
205
Finite temperature dynamics of a Holstein polaron : the thermo-field dynamics approach
Published 2019“…Results on the mean square displacements show that band-like transport features dominate the diagonal coupling cases, and there exists a crossover from band-like to hopping transport with increasing temperature when including off-diagonal coupling. …”
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Journal Article -
206
Electrical and photoresponse properties of Co3O4 nanowires
Published 2013“…Photoresponses of individual nanowires were obtained by global irradiation of laser beams with photon energies above band gap and at sub-band gap of the nanowires. The magnitude of photocurrent and its response time revealed that defect level excitations significantly contribute to the photoresponse of Co3O4 nanowires. …”
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Journal Article -
207
Hole spin helix : anomalous spin diffusion in anisotropic strained hole quantum wells
Published 2014“…We show that a simple two-band Hamiltonian can be used to describe the holes. …”
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Journal Article -
208
An 8mW ultra low power 60GHz direct-conversion receiver with 55dB gain and 4.9dB noise figure in 65nm CMOS
Published 2013“…An ultra low power direct-conversion receiver is demonstrated for V-band 60GHz applications in 65nm CMOS process. The power consumption is significantly reduced by the design of low-power low noise amplifier (LNA), transconductance mixer and variable gain amplifier (VGA). …”
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Conference Paper -
209
Power control system/algorithm study for multimedia communication in LEO satellite CDMA systems
Published 2008“…In this study, the research emphasis is on the propagation loss combating techniques in LEO (low-earth-bit) satellite DS-CDMA systems operating at Ka-band. The proposed approaches are also applicable to LEO satellite systems operating at other bands (L/S bands) when the mobile moves in a nonuniform environment and a complete system evaluation is needed.…”
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Thesis -
210
Improved 3-D frequency-selective structures and their applications
Published 2019“…The first structure is a tri-band second-order frequency-selective structure, while the second structure exhibits a dual-band third-order response. …”
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Thesis -
211
Electrically tunable steganographic nano-optical coatings
Published 2023“…The proposed SNOC design combines a broad-band and a narrow-band absorber made up of PCMs to achieve tunable optical Fano resonance in the visible wavelength, which is a scalable platform for accessing the full-color range. …”
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Journal Article -
212
Optimization of Sb2(S, Se)3 photoabsorbers for photoelectrochemical hydrogen evolution reaction
Published 2024“…This is due to their unique characteristics, such as tuneable band gap, quasi-1D crystal structure, appropriate band alignment for water splitting, a stable single orthorhombic phase, low cost and non-toxicity. …”
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Final Year Project (FYP) -
213
Multi-IRS empowered terahertz wireless communication over generalized fading
Published 2024“…Intelligent reflecting surfaces (IRS) have emerged as a promising technology for addressing the inherent challenges associated with terahertz (THz) bands, thereby enhancing system performance and offering immense potential for future wireless systems. …”
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Conference Paper -
214
A functionally arranged phononic crystal rod enabling ultra-wideband vibration attenuation and orderly frequency distillation
Published 2024“…Based on these calculations, careful parameter selection yields a compact configuration for a functionally arranged phononic crystal rod, boasting an exceptionally wide band gap spanning frequencies from 100 Hz to 10,000 Hz. …”
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Journal Article -
215
Design of IIR filters by optimization techniques
Published 2011“…Last but not least, a special IIR filter, namely Half-Band Filter (HBF) was designed through SOCP based All-Pass Filters’ Method, SCLS-SM, Direct SM and SMSOF Methods. …”
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Final Year Project (FYP) -
216
Theoretical studies and model calculations of femtosecond stimulated Raman spectroscopy
Published 2012“…The SRS(I) contributes to the Stokes band, IRS(I) contributes to anti-Stokes band of FSRS spectra, while the SRS(II) and IRS(II) form the baseline of FSRS spectra. …”
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Thesis -
217
Photonic crystal enhanced lasers
Published 2013“…It can be observed that with a smaller well width, the energy level will be higher for Conduction band, smaller for Valence band. In addition, Optical Gain was touched on briefly to ensure that TME results were correct and also finding of the energy based on the k value range for calculation of the quantum well optical gain. …”
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Final Year Project (FYP) -
218
Development of compact power electronics inverter using gallium nitride (GaN) devices
Published 2015“…Points of merit like high energy band gap and high thermal conductivity, leads the converter to be able to operate in super low switching period (high frequency) and lessen the switching loss, hence resulting a high efficiency in the output power and high power density at the load end. …”
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Final Year Project (FYP) -
219
Origin of Photocarrier Losses in Iron Pyrite (FeS2) Nanocubes
Published 2017“…We found that fast carrier localization of photoexcited carriers to indirect band edge and shallow trap states is responsible for major carrier loss. …”
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Journal Article -
220
Partial Discharge Characterization of HFO(E) Gas Using Ultra-High Frequency (UHF) Antenna for Medium Voltage Switchgear Application
Published 2024“…The working frequency band of the proposed UHF antenna is 370 MHz–1300 MHz, which translates into a total bandwidth of 930 MHz UHF frequency band. …”
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