Arif Mawardi Ismail
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Preferred name
Arif Mawardi Ismail
Official Name
Arif Mawardi, Ismail
Alternative Name
Ismail, Arif Mawardi
Mawardi, A.
Main Affiliation
Scopus Author ID
57224866382
Researcher ID
ABM-8075-2022

Research Output
Now showing 1 - 4 of 4
  • Publication
    A review of visible-to-UV photon upconversion systems based on triplet–triplet annihilation photon upconversion
    ( 2022-12)
    Kelvin Voon Yan Jie
    ;
    Mohd Fairus Ahmad
    ;
    Muhammad Mahyiddin Ramli
    ;
    Safizan Shaari
    ;
    Arif Mawardi Ismail
    ;
    Yusran Sulaiman
    Due to the tunable spectrum range and potential application under non-coherent solar irradiation, triplet-triplet annihilation based molecular photon upconversion (TTA-UC) systems represent a compelling study field for a variety of photonic implementations. There were studies on the incorporation of TTA-UC technology with photovoltaic technology, which made it possible to further improve the energy harvest performance through the utilisation of the wasted spectrum. However, many TTA-UC studies are limited to energy upconversion within the visible spectrum range. For photovoltaic cells with a higher band gap, which harvest the higher energy spectrum (UV region), an efficient Vis-to-UV upconversion is preferred. The Vis-to-UV TTA-UC system was first introduced in 2006. Recently, more studies were conducted to discover the Vis-to-UV upconversion system with high quantum efficiency and low excitation intensity such as the nanocrystal sensitizerbased system and the thermally activated delayed fluorescence sensitizer-based system. Recent studies in the solvent system of Vis-to-UV upconversion system had demonstrated the dependence of the couple photostability on the solvent and extended the solvent selection to inorganic solvent. In this review, we are reviewing the research background of the Vis-to-UV TTA-UC system and discussing the current challenges and potential developments in this research area.
  • Publication
    Analysis of power distribution in mach zehnder interferometer polymer-based waveguide for sensing applications
    ( 2022-12)
    Mohd. Azarulsani Md. Azidin
    ;
    Nurjuliana Juhari
    ;
    Arif Mawardi Ismail
    ;
    Norhayati Sabani
    Two Mach Zehnder Interferometer (MZI) polymer-based waveguide designs namely MZI symmetrical and MZI asymmetrical structures were simulated and analyzed using Optiwave OptiBPM10. The two designs with device size of 4000μm x 300μm exhibit clear optical propagation path when light is simulated through them as well as displaying single mode profile. Highest output power was obtained by the MZI symmetrical design at 0.90 a.u, which suggests better waveguide design for sensing applications.
  • Publication
    Fabrication of Strontium Titanate thin film with pre-crystallized layer via sol-gel spin coating method
    ( 2022-12)
    Kelvin Voon Yan Jie
    ;
    Mohd Fairus Ahmad
    ;
    Muhammad Mahyiddin Ramli
    ;
    Safizan Shaari
    ;
    Arif Mawardi Ismail
    ;
    Yusran Sulaiman
    The technique of pre-crystallized layer is introduced in the strontium titanate (STO) thin film fabrication to improve the coating thickness and the crystallinity. The STO thin films were fabricated on glass substrates via the spin coating method with STO precursor solution that was synthesized through the sol-gel process. The characteristics of the thin films were analyzed through X-ray diffraction (XRD) analysis, profilometry, UV-Vis spectra analysis and scanning electron microscopy (SEM) analysis. In the present study, the samples of 20 layers and 25 layers (deposited on the pre-crystallized layer) exhibited better crystallinity as compared with the samples of 5 layers, 10 layers and 15 layers (without the pre-crystallized layer). The samples of 25 layers exhibited the highest film thickness (224 nm), highest absorbance intensity and the highest XRD peak intensity at 32, 40, 47 and 58°, which represent the planes (110), (111), (200) and (210), respectively. The pre-crystallized layer served as the mechanical support for further layer deposition.
  • Publication
    Analysis of an electrically induced optical waveguide in a c-axis barium titanate thin film
    ( 2021-12)
    Arif Mawardi Ismail
    ;
    Prabakaran A/L Poopalan
    ;
    Nurjuliana Juhari
    ;
    Mohd. Azarulsani Md. Azidin
    In this paper, we report our analysis of an electrically generated optical waveguide in a 𝑐- axis barium titanate (BTO) thin film. The waveguide consists of a BTO thin film which is sandwiched between two electrodes. The thin film forms a waveguide when a voltage difference is applied across the electrodes. It is found that the formed waveguide supports both TE and TM modes, with TM modes more tightly confined within the waveguide than TE modes. The possibility to turn the waveguide on and off simply by turning the electric field on and off may prove useful for optical switching.