Article
Optics
Weiqiang Xie, Peter Verheyen, Marianna Pantouvaki, Joris Van Campenhout, Dries Van Thourhout
Summary: This work demonstrates ultrahigh-Q one-dimensional (1D) PhC nanocavities fabricated on a 300 mm silicon-on-insulator wafer, with a record Q factor of up to 0.84 million. Efficient mode management is shown by coupling them with an access waveguide, allowing both single-wavelength and multi-wavelength operation over a broad wavelength range (>100 nm).
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Zan Hui Chen, Weicheng Chen, Zhenzhou Cheng, Guo-Wei Lu, Jiaqi Wang
Summary: This paper presents a theoretical demonstration of enhancing Fano resonances in a silicon-on-insulator metasurface (SOIM) using a tandem neural network design, resulting in multiple Fano resonances with high Q-factor in the symmetry-breaking SOIM structure. The designed Fano-resonant SOIM shows high sensitivity as a methanol sensor and significant spectral features in the near-infrared regime.
IEEE PHOTONICS JOURNAL
(2022)
Review
Physics, Multidisciplinary
Hongyu Zhang, Wen Zhao, Yaotian Liu, Jiali Chen, Xinyue Wang, Cuicui Lu
Summary: Photonic-plasmonic hybrid microcavities have a higher figure of merit Q/V, enhancing light-matter interaction. They include photonic crystal microcavities, whispering gallery mode microcavities, Fabry-Perot microcavities, demonstrating their physics and applications. Topological photonic crystal microcavities and hybrid nano-cavities also provide a robust platform for nanophotonic devices.
Article
Optics
Evangelos Dimopoulos, Aurimas Sakanas, Andrey Marchevsky, Meng Xiong, Yi Yu, Elizaveta Semenova, Jesper Mork, Kresten Yvind
Summary: This paper demonstrates a continuous-wave PhC nanolaser with an ultra-low threshold current, operating at room temperature. It also investigates the influence of carrier leakage and fabrication disorder on laser performance.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Marcus Albrechtsen, Babak Vosoughi Lahijani, Soren Stobbe
Summary: We present a theoretical study on dielectric bowtie cavities and identify two distinct confinement regimes. Distinguishing between these regimes is crucial for future research on nanocavities and enables strongly enhanced light-matter interaction over large bandwidths.
Article
Materials Science, Multidisciplinary
Qifa Liu, Jingtong Bin, Kerui Feng, Lu Cheng, Lianjie Zhao, Guohua Wu, Jing Chen
Summary: In this study, GaN-based blue photonic crystal surface emitting lasers (PCSELs) were designed by incorporating a TiO2 photonic crystal (PhC) layer on top of the GaN surface. The structure design was optimized to achieve high PhC confinement factor and low gain threshold. The calculated photonic band diagram shows that the designed PCSELs operate at the gamma 1 band edge with low energy consumption.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Qing Xu, Feng Chen, Jia-Min Liu, De-Long Zhang, Ping-Rang Hua
Summary: The study shows that the rib-type photonic wire based on LiNbO3 on insulator is more flexible in dispersion tailoring and can achieve zero dispersion. TE mode is suitable for dispersion flatness application while TM mode is more appropriate for dispersion engineering.
Article
Optics
Junhu Zhou, Jie You, Hao Ouyang, Runlin Miao, Xiang'ai Cheng, Tian Jiang
Summary: This study presents a theoretical analysis of a novel multi-channel light amplification photonic system on chip, utilizing the nonlinear Raman amplification phenomenon in silicon wire waveguides and a temperature insensitive Mach-Zehnder interferometer filter as demultiplexer. The system incorporates various optical effects to achieve thermal robustness and prevent thermal interference, showing promising potential for future applications.
CHINESE OPTICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Matthew Spear, Hugh J. Barnaby, Trace Wallace, Jose Solano, Oliver Forman, Donald Wilson, Ivan Sanchez Esqueda, Aymeric Privat, Marek Turowski, Rudolph VonNiederhausern, Matthew J. Marinella
Summary: Experimental results show the response of 22 nm fully depleted silicon on insulator (FDSOI) transistors to 10 keV x-rays. The extracted coupling factor between the front- and back-gates of the device exhibits a non-linear dependence on total ionizing dose (TID). A new model is proposed to account for the depletion region in the well under the buried oxide, resulting in a revised coupling factor that fits well to experimental data and simulations.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Lazhar Kassa-Baghdouche
Summary: The study proposes and analyzes the gas sensing performance of photonic crystal (PhC) nanocavities on a silicon-on-insulator platform. By adjusting the etch-depth of circular air holes in the substrate, the quality factor can be increased and the mode volume reduced, enhancing sensing capabilities.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Physical
Zicheng Lu, Hong Zhou, Yi Wang, Yanxiang Liu, Tie Li
Summary: Silicon nanowire field-effect transistor (SiNW-FET) sensors have the capability of rapid, real-time, and label-free detection of charged molecules with high sensitivity and selectivity. By a combination of horizontal and vertical control, a novel fabrication approach for silicon nanowires has been developed, resulting in improved device uniformity and lower current fluctuation. The new approach shows a more accurate bio-analysis application of the silicon nanowire sensor.
Article
Multidisciplinary Sciences
David Glukhov, Zeev Zalevsky, Avi Karsenty
Summary: This article provides a thorough analysis of the functionality of a nanoscale silicon-based optoelectronic modulator, focusing on the competition between thermal and photonic processes and proposing a solution using picosecond pulsed laser to minimize energy loss in heat.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Matthias L. Vermeer, Raymond J. E. Hueting, Luca Pirro, Jan Hoentschel, Jurriaan Schmitz
Summary: Quantification of interface traps in double-gate fully depleted silicon-on-insulator transistors is crucial for accurate device modeling and technology development. A new method combining the g(m)/I-D method and a revised form of the k-sweep method was developed in this study, resulting in a typical trap density of 2*10^(11)cm^(-2)eV^(-1). However, the allocation of traps to the front or back interface is challenging, with at least a 20% error reported.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Optics
Boquan Ren, Hongguang Wang, Yaroslav V. Kartashov, Yongdong Li, Yiqi Zhang
Summary: Higher-order topological insulators can support topologically protected states with lower dimensionality than the structure itself. This study presents the bifurcation of nonlinear photonic disclination states in disclination lattices with pentagonal or heptagonal cores. Nonlinearity allows for tuning the states' location and affects their shapes. The stability of these nonlinear topological states depends on the structure of the disclination lattice.
Article
Engineering, Electrical & Electronic
Marina Antoniou, Florin Udrea, Elizabeth Kho Ching Tee, Alex Hoelke
Summary: PSOI technology is a suitable choice for high-voltage integrated circuits, offering a wider range of voltage ratings, lower on-state resistance, and better heat conduction. In this study, a PSOI technology platform is introduced, which can achieve voltage ratings ranging from 45 to 400V, while providing low on-state resistance, good hot carrier injection stability, and electrostatic discharge capability for high-voltage devices.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Optics
Yangbo Wu, Zhibo Qu, Ahmed Osman, Chen Wei, Wei Cao, Antulio Tarazona, Swe Zin Oo, Harold M. H. Chong, Otto L. Muskens, Goran Z. Mashanovich, Milos Nedeljkovic
Summary: A waveguide-based bolometer operating in the 3.72-3.88 micrometer wavelength range has been developed, with significant improvements in responsivity compared to previous silicon-on-insulator bolometers. Potential for further improvement in thermal conductance through device redesign is suggested.
Article
Optics
Mohamad Hazwan Haron, Burhanuddin Yeop Majlis, Ahmad Rifqi Md Zain
Summary: This paper introduces a novel technique to increase the Q-factor of a one-dimensional photonic crystal cavity device using an end loop-mirror (ELM), effectively recycling transmitted light from conventional design to achieve higher Q-factor. Experimental results demonstrate the feasibility of this design in increasing Q-factor values.
Article
Engineering, Electrical & Electronic
Dinesh Pamunuwa, Elliott Worsey, Jamie D. Reynolds, Derek Seward, Harold M. H. Chong, Sunil Rana
Summary: This study develops an analytical model of rotational NEM relays based on first-principle physics, aiming to understand the variation of programming and reprogramming voltages based on device dimensions and surface adhesion force. An experimental parametric study is also conducted for relays with a critical dimension of approximately 80 nm to characterize the surface adhesion force and derive guidelines for designing a NEM relay that meets given contact surface force, feature size constraints, and operating requirements.
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2022)
Article
Multidisciplinary Sciences
Muhammad Asif Ahmad Khushaini, Nur Hidayah Azeman, Ahmad Ghadafi Ismail, Chin-Hoong Teh, Muhammad Mat Salleh, Ahmad Ashrif A. Bakar, Tg Hasnan Tg Abdul Aziz, Ahmad Rifqi Md Zain
Summary: This study utilized the RS mechanism, formed by electrochemical redox-reactions, and a novel organic molecule, BOBzBT(2), to modify the SPE electrode for creatinine sensing. By optimizing the concentration of BOBzBT(2) during CV measurements, the sensor's sensitivity was enhanced, showing potential for practical application in detecting creatinine levels.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Nur Afifah Ahmad Nazri, Nur Hidayah Azeman, Mohd Hafiz Abu Bakar, Nadhratun Naiim Mobarak, Yunhan Luo, Norhana Arsad, Tg Hasnan Tg Abd Aziz, Ahmad Rifqi Md Zain, Ahmad Ashrif A. Bakar
Summary: This paper investigates carbon quantum dots and silver nanoparticles as sensing materials for localized surface plasmon resonance sensors in chlorophyll detection. The composite material of carbon quantum dots and silver nanoparticles exhibits a better linear response and higher sensitivity than silver nanoparticles alone for chlorophyll detection.
Article
Chemistry, Multidisciplinary
Lilik Hasanah, Adryan Ashidiq, Roer Eka Pawinanto, Budi Mulyanti, Chandra Wulandari, Ahmad Rifqi Md. Zain
Summary: This paper studies the optimization of perovskite solar cells with a two-dimensional nanodisk photonic crystal and an organic-inorganic lead-iodide perovskite as the absorber layer. Through finite-difference time-domain simulation, the optimal lattice constant and photonic crystal radius are determined, resulting in an absorption performance improvement of over 94% of incident light.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Nur Hidayah Azeman, Mohd Hafiz Abu Bakar, Nur Afifah Ahmad Nazri, Nadhratun Naiim Mobarak, Muhammad Asif Ahmad Khushaini, Tengku Hasnan Tengku Abdul Aziz, Ahmad Rifqi Md Zain, Ahmad Ashrif A. Bakar
Summary: This work reports the application of silver nanotriangles (AgNT) incorporated with chitosan/graphene oxide (Chit/GO) and carboxymethyl chitosan/graphene oxide (CMChit/GO) for the enhancement of ammonium localized surface plasmon resonance (SPR) sensor. The ammonium is detected through the hydrogen bonding between the hydroxyl functional group on the sensing material surface with ammonium. The results show that the addition of AgNT, Chit/GO, and CMChit/GO can improve the sensitivity of the sensor and effectively detect ammonium.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Muhammad Asif Ahmad Khushaini, Nur Hidayah Azeman, Muhamad Mat Salleh, Tg Hasnan Tg Abdul Aziz, Ahmad Ashrif A. Bakar, Richard M. De La Rue, Ahmad Rifqi Md Zain
Summary: In this study, an organic pentamer SPR sensor using the Otto configuration was developed for creatinine detection in a strong coupling regime. By optimizing the experimental calibration curve, the performance of the sensor was significantly improved.
Article
Multidisciplinary Sciences
Stefan T. Ilie, Joaquin Faneca, Ioannis Zeimpekis, Thalia Dominguez Bucio, Katarzyna Grabska, Daniel W. Hewak, Harold M. H. Chong, Frederic Y. Gardes
Summary: This work explores a new family of phase change materials based on antimony for applications in near-IR tunable photonics. The optical characteristics and thermal tunability of Sb2S3 are characterized, and integration into a silicon nitride platform is demonstrated using a microring resonator. The potential applications include optically controlled memories and high-density switch matrix.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Nur Afifah Ahmad Nazri, Nur Hidayah Azeman, Mohd Hafiz Abu Bakar, Nadhratun Naiim Mobarak, Tg Hasnan Tg Abd Aziz, Ahmad Rifqi Md Zain, Norhana Arsad, Yunhan Luo, Ahmad Ashrif A. Bakar
Summary: An optical sensor-based localized surface plasmon resonance (LSPR) sensor was demonstrated for sensitive and selective chlorophyll detection through the integration of amino-functionalized carbon quantum dots (NCQD) and triangle silver nanoparticles (AgNPs). The sensor showed high sensitivity and detection limits, with no interference from other ionic species.
Article
Nanoscience & Nanotechnology
James D. Reynolds, Sunil Rana, Elliott Worsey, Qi Tang, Mukesh K. Kulsreshath, Harold M. H. Chong, Dinesh Pamunuwa
Summary: A new in-plane four-terminal relay with a single moving contact has been successfully fabricated and characterized, which can operate with zero leakage current at high temperatures and radiation levels. Compared to three-terminal relays, this four-terminal relay enables more efficient logic circuits with fewer devices.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Polymer Science
Mona Ebadi, Nurul Asikin-Mijan, Mohd Suzeren Md. Jamil, Anwar Iqbal, Emad Yousif, Ahmad Rifqi Md Zain, Tengku Hasnan Tengku Aziz, Muhammad Rahimi Yusop
Summary: It was found that the immobilization of palladium nanoparticles on superparamagnetic chitosan-coated manganese ferrite overcomes the challenge of aggregation and maintains high catalytic activity. The Pd-Chit@MnFe2O4 catalyst showed excellent catalytic performance in the reduction of 4-nitrophenol and 4-nitroaniline, with high turnover frequencies. The catalyst can be easily recovered by magnetic separation and exhibited good performance in the reductive deprotection of allyl carbamate.
Article
Optics
Siyu Chen, Jianzhi Huang, Shengqi Yin, Milan M. Milosevic, Hailong Pi, Jize Yan, Harold M. H. Chong, Xu Fang
Summary: Integration of metasurfaces and SOI chips offers advantages from both metamaterials and silicon photonics, enabling new light shaping functionalities in planar, compact devices compatible with CMOS production. To extract light vertically from a 2D metasurface into free space, a wide waveguide is commonly used, but it can cause mode distortion due to its multi-modal feature. This study proposes an alternative approach using an array of narrow, single-mode waveguides, which can tolerate nano-scatterers with high scattering efficiency, such as Si nanopillars in direct contact with the waveguides.
Article
Physics, Multidisciplinary
Muhammad Asif Ahmad Khushaini, Nur Hidayah Azeman, Tg Hasnan Tg Abdul Aziz, Ahmad Ashrif A. Bakar, Richard M. de la Rue, Ahmad Rifqi Md Zain, Burhanuddin Yeop Majlis, Clarence Augustine Th Tee
Summary: A strong coupling regime with dressed states is observed when a propagating surface plasmon mode continuously exchanges energy with a group of excitons at a rate faster than the system's losses. This phenomenon, characterized by the superposition of superradiance excitons and PSP modes along with remaining subradiance excitons, is found to exist in a hybrid system of nonlinear organic dye layer and PSP mode. The experimental and theoretical results demonstrate a close agreement, providing a new perspective on the relationship between the optical properties of a third-order nonlinear material and the extent of strong coupling.
Article
Polymer Science
Mona Ebadi, Ahmad Rifqi Md Zain, Tengku Hasnan Tengku Abdul Aziz, Hossein Mohammadi, Clarence Augustine T. H. Tee, Muhammad Rahimi Yusop
Summary: Coated iron oxide nanoparticles were synthesized for the delivery of sorafenib and their effects on cancer cells were investigated. The study demonstrated that the use of polyethylene glycol-coated iron oxide nanoparticles could enhance the effect of sorafenib on cancer cells.
