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Prof. Ali Abdulkhaleq Alwahib
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11Years (2016-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 September 2018 in Optik
Journal Article
NZNurul Hida Zainuddin
Nurul Hida Zainuddin
YFYap Wing Fen
Yap Wing Fen
AAAli Abdulkhaleq Alwahib
Ali Abdulkhaleq AlwahibMYMohd Yaacob
Mohd YaacobNBNoriah Bidin
Noriah Bidin
MMMohd Adzir Mahdi
Mohd Adzir Mahdi
+1
8 June 2016 in IEEE Photonics Journal
Journal Article
AAAli Abdulkhaleq Alwahib
Ali Abdulkhaleq AlwahibASA. R. Sadrolhosseini
A. R. Sadrolhosseini
MAM. N. An'AMt
M. N. An'AMt
HLHong Ngee Lim
Hong Ngee LimMYMohd Yaacob
Mohd YaacobMMM. A. Mahdi
M. A. Mahdi
+2
In this paper, a reduced graphene oxide/maghemite (rGO/γ-Fe 2 O 3 ) nanocomposite film was used as the sensing layer using surface plasmon resonance (SPR) technique. The fabricated SPR sensor was based on a trilayer structure in which the rGO/γ-Fe 2 O 3 nanocomposite layer was sandwiched between two gold layers. The SPR sensor was tested with hydrocarbon materials such as acetone, ethanol, methanol, and propanol. Based on the findings, the resonance angle shift with the presence of acetone is 1.891°, the largest among other hydrocarbon materials. The sensitivity of resonance angle shift toward acetone concentration is 0.0368°/%. These results demonstrate the massive potential of rGO/γ-Fe 2 O 3 nanocomposite material for optical sensing applications.
1 February 2020 in Optik
Journal Article
AAAli Abdulkhaleq Alwahib
Ali Abdulkhaleq AlwahibSASarmad Fawzi Alhasan
Sarmad Fawzi AlhasanMYMohd Yaacob
Mohd YaacobHLHong Ngee Lim
Hong Ngee LimMMMohd Adzir Mahdi
Mohd Adzir Mahdi
17 May 2023 in Applied Optics
Journal Article
MAMohammed J. Alali
Mohammed J. Alali
MRMithaq Nama Raheema
Mithaq Nama Raheema
AAAli Abdulkhaleq Alwahib
Ali Abdulkhaleq AlwahibThis study implemented AND, NAND, OR, XOR, NOR, XNOR, and NOT plasmonic logic gates using the finite element method. The all-optical nanoscale logic gates were designed using a single structure based on the technology of insulator-metal-insulator nanoscale plasmonic waveguides. The phase of optical waves and the position of the control and input ports are the most important factors for attaining the optimal transmission value based on interference between the input and control ports. The transmission threshold is 35%, and 850 nm is the operating wavelength. This design creates nanoscale logic gates with a structure dimension of 250nm×250nm. The transmission threshold, modulation depth, contrast ratio, and insertion loss criteria were proposed to evaluate the efficacy of the all-optical gates.
21 October 2018 in IEEE Photonics Journal
Journal Article
AAAli Abdulkhaleq Alwahib
Ali Abdulkhaleq AlwahibYKYasmin Mustapha Kamil
Yasmin Mustapha KamilMBMuhammad Hafiz Abu Bakar
Muhammad Hafiz Abu BakarANAhmad Shukri Muhammad Noor
Ahmad Shukri Muhammad Noor
MYMohd Yaacob
Mohd YaacobMMMOHD ADZIR MAHDI
MOHD ADZIR MAHDI +2
A prism-based surface plasmon resonance (SPR) sensor deposited with reduced graphene oxide/maghemite is presented for the detection of lead ions (Pb 2+ ) in water. The SPR setup proposed followed the Kretschmann configuration with the installment of the nanocomposite integrated bilayer sensor chip onto the prism. For protection, the nanocomposite active layer was coated with 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimidehydrochloride/N-hydroxysuccinimide. When the sensor was tested with different concentrations of Pb 2+ in static water, the limit of detection was achieved at 0.001 ppm with a resonance angle shift of 0.184°. As an improvisation, a sample circulation design was adapted into the setup in order to increase the interaction rate between the sample and the sensing layer. This managed to improve the detection limit to 0.3 ppb.
7 March 2023 in Journal of Optics
Journal Article
SOSarah Osamah
Sarah Osamah
AAAli Abdulkhaleq Alwahib
Ali Abdulkhaleq AlwahibMFMakram Fakhri
Makram FakhriSGSubash C. B. Gopinath
Subash C. B. Gopinath
About Me
Prof. Dr. Ali Alwahib
Ph.D. in Optoelectronics, University Putra Malaysia (UPM), 2017
Prof. Dr. Ali Alwahib is a distinguished researcher and academic specializing in optoelectronics, with deep expertise in plasmonics, laser technologies, and advanced sensor systems. He earned his Ph.D. in 2017 from University Putra Malaysia (UPM), where his research focused on the development and characterization of high-sensitivity optical sensors based on plasmonic and laser-driven mechanisms.
Over the course of his scientific career, Prof. Dr. Alwahib has contributed significantly to the fields of surface plasmon resonance (SPR) and metal oxide-based sensing platforms, with applications in environmental monitoring and energy-efficient systems. His work often bridges the gap between fundamental photonics research and real-world applications, particularly in the area of hydrogen sensors operating at room temperature.
Known for his interdisciplinary approach, he continues to explore the integration of laser technologies with novel materials to enhance sensor performance and precision in optoelectronic devices. In addition to his research, Prof. Dr. Alwahib is actively involved in teaching, mentoring, and academic leadership.