Suzairi Daud

Particle Accelerator Using Optical Tweezer for Photodetector Performance Improvement

A photodetector performance improvement technique using a particle accelerator in the modified add-drop optical filter is proposed. An optical tweezer is used to control the electron movement within the device, where an electron (particle) can be accelerated and moved faster than the normal condition, where finally the silicon bulk defects and diode performance degradation can be solved. In simulation, a PANDA microring is configured by a modified add-drop filter that can be used to increase the electron speed. In operation, the trapped electrons in a diode can be trapped, controlled, and transported from anode to cathode contacts. In the design system, the trapping probe can be adjusted to fit the atom size from 200 pm (picometer) to 1.4 nm (nanometer) by controlling the ring parameters. The goal of this paper is to present the use of a PANDA microring for photodetector performance improvement, which can be used for many applications.

Molecular filter on-chip design for drug targeting use.

Abstract This paper presents the use of a modified add/drop optical filter incorporating with microring resonators known as a PANDA microring resonator system which can fabricate on small chip. By using an optical tweezer, the required molecules can be trapped and moved to the required destinations at the add/drop ports. The novelty is that the stored molecules in the designed chip can transport via the optical waveguide and can also be used to form molecular filter, which is an important technique for drug delivery, drug targeting, and molecular electronics. Results have shown that the multivariable filter can be obtained by tunable trapping control.

Molecular Filter On-Chip Design

This paper presents the use of a modified add-drop optical filter known as a PANDA microing resonator which can be designed on a chip. By using an optical tweezer, the required molecules can be trapped and moved to the required destinations, where finally, the required molecules can be retrieved (filtered) by using the tunable filter via the add-drop filter control. In application, storage molecules in the bottle in the designed chip can be trapped and moved to the required targets by optical tweezers, which can transport via the optical waveguide. Therefore, this technique can be used to form the molecular filter. This is a new technique and important for drug delivery, drug targeting and molecular electronics, which is described, the optical tweezer generation using a PANDA ring resonator is also reviewed. Results obtained have shown that the multivariable filter can be obtained by tunable trapping control. the simulation results are obtained by using the commercial MATLAB software, which is found that this device can be used to form the hybrid electronic device, in which the combination between the conventional electronics and molecular electronics can be established, moreover, the multivariable molecular filter can be formed, which can be available for high capacity molecular communication and networks.

Atom Bottom-Up Manipulation Controlled by Light for Microbattery Use

In this paper, we propose a new design of the atom bottom-up technique that uses an optical trapping tool to form the atom trapping layer within a thin-film grating. By using a PANDA ring resonator, where atoms can be trapped, pumped, and controlled by light, the trapped atoms/molecules can be selected, filtered, and embedded within the required thin-film grating layers to manufacture nanobattery. In application, P-type or N-type atom can be prepared, trapped, and embedded within the desired thin-film layers, and finally, the microbattery can be manipulated. The theoretical background of light pulse in a PANDA ring resonator is also reviewed.

Ultra-short Laser Pulse Generated by a Microring Resonator System for Cancer Cell Treatment

Abstract A microring resonator (MRRs) system incorporated with a add/drop filter is proposed in which ultra-short single, multi-temporal, and spatial optical soliton pulses are simulated and used to kill abnormal cells, tumors, and cancer. Chaotic signals are generated by a bright soliton pulse within a nonlinear MRRs system. Gold nanoparticles and ultra-short femtosecond/picosecond laser pulses’ interaction holds great interest in laser nanomedicine. By using appropriate soliton input power and MRRs parameters, desired spatial and temporal signals can be generated over the spectrum. Results show that short temporal and spatial solitons pulse with FWHM = 712 fs and FWHM = 17.5 pm could be generated. The add/drop filter system is used to generate the high-capacity, ultra-short soliton pulses in the range of nanometer/second and picometer/second.

Fibre Bragg grating and no-core fibre sensors

Introduction -- Literature Review -- Theory -- Methodology -- Indoor Fibre Bragg Grating Temperature Sensor -- Outdoor Fibre Bragg Grating Temperature Sensor -- Conclusion.

Operational Principles of Fibre Bragg Grating and No-Core Fibre

Fibre optics is an overlap of applied science and engineering concerned with the design and application of optical fibre. Normal optical fibre s possess a uniform refractive index along their lengths. Such fibre is referred to as fibre Bragg grating (FBG). FBG is defined as a periodic perturbation of a refractive index formed by exposing its naked core to an intense optical interference pattern. FBG is a passive optical component which selectively reflects and transmits lights at certain wavelengths. The portion of light where the wavelength is equal to the Bragg wavelength will be reflected and the rest will be transmitted through the FBG. The refractive index variation scatters light that passes through the fibre. It provides modulation of core refractive index for single-mode fibre. In FBG, the gratings are uniformly spaced regions in fibre where the refractive index has been raised from the rest of the core. These radiations scatter light and they are called the Bragg effect. Every time the light hits the region of the scattered higher refractive index, a few light beams will be scattered from each higher index zone, interfering constructively and producing strong refraction as shown in Fig. 2.1. High-index regions scatter light at other wavelengths, but the scattered wave differs in phase by canceling each other out in destructive interference.

Recycling of pneumatic scrap tyre into nano-crumb rubber by pulsed laser ablation in different pH media

Nano crumb rubber from scrap tyre is synthesized via 1064 nm pulsed Nd:YAG laser ablation in three different pH media i.e. DI-water (pH~6.45), D-limonene (pH~3.47) and NaOH solution (pH~13.41). Field Emission Scanning Electron Microscope (FESEM) results show spherical morphology of crumb rubber with high degree of aggregation in DI-water and in D-limonene. However, dispersion of crumb rubbers is observed in NaOH solution. The smallest particles size is obtained in NaOH solution within the range of 10.9 nm – 74.3 nm. Energy-dispersive X-ray spectroscopy (EDX) and FTIR analysis confirmed the elements distribution and chemical bonding of rubber with DI-water, D-limonene and NaOH solution. The experimental findings shows that pulsed Nd:YAG laser ablation has potential for fabricating nano-crumb rubber in liquid media.

Implication of plasma dispersion effect for controlling refractive index in microresonator

In this paper, the theoretical simulation of all-pass microring resonator is performed by considering the plasma dispersion effect. The plasma dispersion contributes in changing the refractive index and resonance wavelength by manipulating the carrier concentration in silicon waveguide. The system requires a sandwich design of silicon microring waveguide which comprise P and N-types silicon material. The depletion region is bounded in the ring resonator waveguide which affect the carrier concentration of the silicon material. The plasma dispersion effect formulation contributes to analyze the effect for applied voltage on effective index and absorption coefficient. The shift of resonance wavelength is analyzed with respect to the change of refractive index.

Arc discharge plasma of carbon ion in H2 and air

Carbon nanostructures become more useful nowadays due to their unique carbon elements and advantages. This paper will present the determination of the energy of carbon ion in different environments and pressures. In this work, arc discharge plasma generated by graphite electrode were chosen to produce carbon nanostructures and CR-39 material were exposed to energetic carbon ion. It was etched with 6.25 M of NaOH solution for 8 hours in (72±1) °C temperature to remove the material from the tracks and the etched detectors will be analyzed with optical microscope. The energy of carbon ion obtained by observing and measured the ion track size on CR-39 target under optical microscope and calculated using the relevant formula. High values of carbon ions energy were observed in hydrogen environment as compared to air at the same pressure.