P Susthitha Menon

P Susthitha Menon
Universiti Kebangsaan Malaysia | ukm · Institute of Microengineering and Nanoelectronics

PhD (Optoelectronics)

About

238
Publications
30,576
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1,180
Citations
Citations since 2016
61 Research Items
884 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150

Publications

Publications (238)
Article
Full-text available
A photodetector converts optical signals to detectable electrical signals. Lately, self-powered photodetectors have been widely studied because of their advantages in device miniaturization and low power consumption, which make them preferable in various applications, especially those related to green technology and flexible electronics. Since self...
Article
Full-text available
The surface plasmon resonance (SPR)-based sensor performance was investigated in bimetallic silver/gold (Ag/Au) thin films. This study aims to examine SPR-sensing performance of the various thickness of Ag/Au to obtain the optimum sensitivity and figure-of-merit (FOM) for glucose detection, compared to Au thin films. Finite-Difference-Time-Domain (...
Article
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Monolayer Au and hybrid Au/GO thin films with thicknesses of 50 nm and 52 nm sequentially, were deposited onto the glass substrate. The effect of laser intensities towards SPP excitation via Kretschmann coupling technique was investigated by varying laser intensities between 30 nW to 80 nW. Maximum SPR represented by the smallest value of Rmin =0...
Article
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The Kretschmann-based surface plasmon resonance (K-SPR) sensor was developed using multilayer graphene and molybdenum disulphide (MoS2) structures on a plasmonic gold (Au) layer for ethanol detection. In this configuration, the SPR spectra of minimum reflectance versus SPR angle was used to determine the sensitivity, detection accuracy and quality...
Article
Full-text available
Diabetes mellitus is a disease of metabolic disorders where human blood contains a high amount of sugar level for a prolonged period. This study aims to simulate the effectiveness of sensors based on microring resonator (MRR) and surface plasmon resonance (SPR) for diabetes monitoring. The results show that a sensor based on MRR and SPR provides th...
Article
Full-text available
Researches on detecting haemoglobin have been intensively carried out as the number of anemia cases increases in both developed and developing countries. The haemoglobin concentration is influenced by some factors including gender, age, and environmental conditions of residence. As to this, the development of sensors to detect haemoglobin concentra...
Article
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The properties of light and its interaction with biological analytes have made it possible to design sophisticated and reliable optical-based biomedical sensors. In this paper, we report the simulation, design, and fabrication of microring resonator (MRR)-based sensors for the detection of diabetic glucose levels. Electron Beam Lithography (EBL) wi...
Conference Paper
Full-text available
Diabetes mellitus is a disease of metabolic disorders where human blood contains a high amount of sugar level for a prolonged period. This study aims to simulate how effective sensor based on MRR and SPR for the purpose of diabetes monitoring. The results show that sensor based on MRR and SPR provides the ability to detect low level of glucose conc...
Article
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To acquire the optimal value of the performance parameter, a bilayer graphene with silicon on insulator (SOI) was enhanced and analyzed on 22 nm NMOS device. The device is made of Hafnium Dioxide (HfO 2 ) as a high-k material whereas Tungsten Silicide (WSi x ) as a metal gate. The Silvaco software ATHENA and ATLAS modules were applied to simulate t...
Article
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This paper reviews Kretschmann-based SPR sensor utilizing ZnO thin films and nanostructures for performance enhancement. The advancement in surface plasmon resonance technology relies on low-cost, high sensitivity and high selectivity sensor. Metal oxide has been incorporated in SPR sensor to be used for detection of biological and chemical compoun...
Article
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In this paper, we determine the optical refractive indices of different molarities of glucose using nano-laminated gold/chromium (Au-Cr) thin film via Kretschmann-based Surface Plasmon Resonance (K-SPR) sensing with angular interrogation. The nano-laminated Au-Cr K-SPR sensor detects the glucose presence in low- and high-concentration of 4-12 mmol/...
Article
This paper presents the design optimization of an Integrated Biosensor Circuit (IBC) which utilizes graphene-based plasmonic Photonic Crystal Waveguide (PCW). The effects of 5 input signals, 4 control factors and 1 noise factor were investigated using Taguchi’s dynamic L9 orthogonal array where the input signals are linearly related to the output r...
Article
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An innovative type of device for high-density and high-speed applications, three-gate (TG) SOI-MESFET, is proposed. The new design is expected to exhibit excellent immunity against short channel effects (SCEs) and leakage current. To investigate the superior subthreshold characteristics of the suggested device, a physically based analytical model f...
Article
In this paper, a Kretschmann based surface plasmon resonance sensor using silver (Ag) and indium tin oxide (ITO) on chromium (Cr)-coated BK7 substrate has been analyzed for refractive index sensor. By numerical simulations, the thickness of the ITO layer along with Ag thin film have been optimized to achieve the best performance of the sensor in te...
Article
Chromium (Cr) layer with ultrathin thickness plays significant role as adhesion layer to attach the prism with various metallic materials in a Surface Plasmon Resonance (SPR) sensor. In this research, the presence of fixed 0.5nm Cr adhesion layer has been investigated to evaluate its influence to reflectivity, resonance angle (θRes) and full-width...
Article
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A label-free detection for dissolved carbon dioxide (dCO2) is developed using a tapered optical fiber sensor. The tapered region of the optical fiber is coated with the zinc oxide (ZnO) nanorice and used as a probe for dCO2 sensing. The sensor probe was exposed to different concentrations of dCO2 solution ranging from 10 to 100 ppm. ZnO nanorice ca...
Article
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This work investigates the surface plasmon resonance (SPR) response of 50-nm thick nano-laminated gold film using Kretschmann-based biosensing for detection of urea and creatinine in solution of various concentrations (non-enzymatic samples). Comparison was made with the presence of urease and creatininase enzymes in the urea and creatinine solutio...
Article
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There is increasing interest in tuning the physical properties of semiconductor nanostructures using metal nanoparticles. In this work, ZnO nanosphere covered with Ag nanoparticles were synthesized using gamma–radiation-assisted method. The amount of deposited Ag nanoparticles is controlled by changing irradiation dose in the range of 30–100 kGy in...
Conference Paper
This paper encompassed of the evolution and key findings, critical technical challenges, solutions and bonding equipment of solder reflow in flip chip bonding. Upon scrutinizing researches done by others, it can be deduced that peak temperature, time above liquidus, soak temperature, soak time, cooling rate and reflow environment played a vital rol...
Article
In this study, the authors investigated the effects of a single layer graphene as a coating layer on top of metal thin films such as silver, gold, aluminum and copper using finite-difference time domain method. To enhance the resolution of surface plasmon resonance (SPR) sensor, it is necessary to increase the SPR reflectivity and decrease the full...
Article
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A planar Graphene Field-Effect Transistor GFET performance with 60 nm gate length was evaluated in discovering new material to meet the relentless demand for higher performance-power saving features. The ATHENA and ATLAS modules of SILVACO TCAD simulation tool was employed to virtually design and assess the electrical performance of GFET. The devel...
Article
Silicon-on-insulator (SOI) has become one of the most famous materials in recent years, especially in silicon photonics applications. This paper presents a comparative performance of a SOI-based optical interconnect (OI) vs. an electrical interconnect (EI) for high-speed performances at a circuit level. The SOI-based optical waveguide was designed...
Article
This paper describes the performance improvement of a DWDM system, utilizing Erbium Doped Fiber Amplifier (EDFA) and Semiconductor Optical Amplifier (SOA) as pre-amplifier. At 10 Gb/s, the system performance achieved using SOA and EDFA combination is better compared to the system with an EDFA. The achieved gain is flatter over 41-channels ranging f...
Article
Silicon based photonics have generated strong interest in recent years, mainly in optical waveguide interconnects for microelectronic circuits. This paper presents a single mode condition (SMC) of SOI-based rib waveguide for high-speed Optical Interconnect (OI) implementation at a circuit level. In OptiBPM, a correlation analysis between two parame...
Article
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9-channel Arrayed Waveguide Grating (AWG) demultiplexer for conventional and tapered structure were simulated using beam propagation method (BPM) with channel spacing of 20 nm. The AWG demultiplexer was design using high refractive index (n~3.47) material namely silicon-on-insulator (SOI) with rib waveguide structure. The characteristics of inserti...
Article
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Optical sensor based on surface plasmon resonance are widely used for various applications. In this paper, an optimization of EM waves polarization modes for the occurrence of SPR by using a modified optical waveguiding assembly has been discussed. A 633 nm of linearly polarized He-Ne laser was appointed as a light source. The polarization modes we...
Article
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Background: Silicon based photonics has created strong interested in recent years, mainly in optical waveguide interconnects for microelectronic circuits. Materials and Methods: This study reports on the implementation of an Optical Interconnect (OI) waveguide in a digital electronic circuit, a two-stage CMOS buffer. To compare the performance betw...
Article
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This paper focuses on the recent advances on radiolysis-assisted shape-controlled synthesis of noble metal nanostructures. The techniques and protocols for producing desirable shapes of noble metal nanoparticles are discussed through introducing the critical parameters which can influence the nucleation and growth mechanisms. Nucleation rate plays...
Article
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The increasing demand in silicon nano-photonics has encouraged many researchers to put more efforts to explore the feasibility of using optics in the communication medium in order to replace the conventional electrical interconnects (EIs). In this paper, we proposed a SOI-based waveguide in the optical interconnect (OI) link at an operating frequen...
Article
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p>The increasing demand in silicon nano-photonics has encouraged many researchers to put more efforts to explore the feasibility of using optics in the communication medium in order to replace the conventional electrical interconnects (EIs). In this paper, we proposed a SOI- based waveguide in the optical interconnect (OI) link at an operating freq...
Article
This report presents a large dynamic operation of wavelength numbers of laser lines that have been periodically filtered using an MZI-SI filter effect. A 70 nm span range for a wider periodic comb filter with 0.60 nm wavelength spacing was achieved through an advanced triple-loop ring-cavity fiber laser with a combination of MZI-SI. Almost all of t...
Conference Paper
This paper investigates an optical performance of the optical interconnect (OI) link using the SOI waveguide. In the transmitter part, the spectrum profile was investigated on the CW source and MZ modulator. while in the receiver part, the receiver sensitivity of the photodetector was measured. The delay of the optical waveguide was examined using...
Conference Paper
Full-text available
The electrical conductivity of the bulk and grain boundary of oxygen deficient (CaxSr1-x)(Ti0.8Fe0.2)O3-δ (x = 0.14, 0.16, 0.18, and 2.0) polycrystalline specimens were estimated by complex impedance spectroscopy analysis in the domestic frequency ranges from 0.01 Hz to 1 MHz at room temperature. The powder ceramic was synthesized using the sonoche...
Article
The paper reports scattering of plane waves by elliptical/circular homogenous, isotropic, and non-magnetic dielectric cylinders coated with chiral medium and surrounded by a perfectly electrical conducting sheath helix structure. The effect of pitch angle on the echo width under the assumption of parallel polarization is discussed, and the results...
Article
A fully autonomous Universal Power Conditioner (UPC) that can accept energy from any micro-energy harvester (e.g., photovoltaic, thermoelectric, electromagnetic, piezoelectric etc.) is proposed. Generally, UPC removes the need of multiple optimized source specific converters. But, the proposed UPC architecture will be Ultra-Low-Power (ULP) with max...
Article
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Purpose The purpose of this paper is to analyse the operation of p-type side gate junctionless silicon transistor (SGJLT) in accumulation region through experimental measurements and 3-D TCAD simulation results. The variation of electric field components, carrier’s concentration and valence band edge energy towards the accumulation region is explor...
Conference Paper
Silicon-on-Insulator (SOI) has become one of the popular materials in recent years, especially in silicon photonics applications. Using SOI, thispaper demonstrated a Single Mode Condition (SMC) of symmetrical rib waveguide geometry for high speed Optical Interconnect (OI). The symmetrical rib waveguide with different dimensions was simulated using...
Article
This paper discusses the effects of different applied voltages on the performance of Mach Zehnder Interferometer (MZI) modulator on Silicon-On-Insulator (SOI). The analysis was done at a wavelength of 1550 nm. The phase modulator was implemented using the forward biased effect of the p-i-n structure. Meanwhile, the MMI splitter and combiner were ut...
Article
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Simulations of a computer-generated downscaled device at 14nm gate length of p-type MOSFET is conferred in this paper. The device is scaled down from a 32nm transistor which is from the former research. A combination of insulator-conductor that were used includes a high-k material and a metal gate where in this research, Hafnium Dioxide (HfO2) is u...
Article
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This paper presents an inclusive study and analysis of graphene-based MOSFET device at 32nm gate length. The analysis was based on top-gated structure which utilized Hafnium Dioxide (HfO2) dielectrics and metal gate. The same conventional process flows of a transistor were applied except the deposition of bilayer graphene as a channel. The analytic...
Article
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This paper focuses on virtual modelling and optimization of 14nm n-types planar MOSFET. Here, high-k dielectric and metal gate were used where the high-k material is Hafnium Dioxide (HfO2) and the metal gate is Tungsten Silicide (WSi2). 36 simulations of Taguchi L9 Orthogonal Array method were applied in order to obtain the best parameter design fo...
Article
In this research paper, the effects of variation on the process parameters were optimised while designing a nano-scaled p-type MOSFET (metal-oxide-semiconductor field-effect transistor) planar device for 22 nm technology. The aim of this procedure is to meet the minimum leakage current (IOFF) by optimising the process parameters as leakage current....
Article
We demonstrated the generation of a multiwavelength laser comb through two different ring cavity designs. The first design, a ring laser with Sagnac filter is being modified to produce a second design known as composite ring cavity. The ASE spectrum obtained from the composite ring cavity is sliced into more than 30 laser lines. From this comb, 22...
Article
The link power improvement in a coarse wavelength division multiplexing (CWDM) system which is transmitted using a hybrid erbium-doped fiber amplifier (EDFA) and semiconductor optical amplifier (SOA) scheme as a pre-amplifier, is discussed. The network is designed for amplifying 8 CWDM channels ranging from 1471 nm to 1611 nm. The hybrid amplifiers...