Article
Optics
Weiwei Zhang, Martin Ebert, Ke Li, Bigeng Chen, Xingzhao Yan, Han Du, Mehdi Banakar, Dehn T. Tran, Callum G. Littlejohns, Adam Scofield, Guomin Yu, Roshanak Shafiiha, Aaron Zilkie, Graham Reed, David J. Thomson
Summary: Researchers have proposed a mechanism to enhance the extinction ratio of a low-quality-factor, high-speed ring modulator by harnessing the plasma absorption induced in a silicon metal-oxide-semiconductor waveguide, paving a way to the evolution of optical interconnects to 100 Gbaud and beyond per wavelength.
Article
Engineering, Electrical & Electronic
Zhen-Wei Li, Shan-Lin Zhu, Guo-Qin Liu, Hong Wang, Yi Wang
Summary: Theoretical study on pulse evolution dynamics in two-stage temporal compression using a graphene-silicon hybrid waveguide as a phase modulator showed that by utilizing saturable absorption (SA) and repressing linearly intensity-dependent absorption (IDA), pedestal-free temporal shape and minimized temporal acceleration can be achieved. Meanwhile, enhancing linearly intensity-dependent refraction (or Kerr effect) contributes to reducing device size and input power of pulse, benefiting the development of graphene-based all-optical modulators in photonic integrated circuits.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Sushma Gali, Akshay Keloth, Shankar Kumar Selvaraja
Summary: In this article, a refractive index measurement method using a double-slot silicon waveguide-based Mach-Zehnder interferometer (MZI) is presented. Compared to wire and single-slot waveguides, the double-slot waveguide offers the best sensitivity and limit of detection (LOD). Experimental proof for double-slot excitation and ultralow loss coupling between a single-mode waveguide and a double-slot waveguide are demonstrated. The double-slot waveguide is utilized as a highly sensitive concentration sensor, achieving a sensitivity of 700 nm/RIU and a LOD of 7.142 x 10(-6) RIU for potassium chloride (KCl) concentrations in deionized water. The demonstrated sensitivity is the highest for an ON-chip-guided waveguide sensing scheme.
IEEE SENSORS JOURNAL
(2023)
Article
Optics
Marco Eppenberger, Andreas Messner, Bertold Ian Bitachon, Wolfgang Heni, Tobias Blatter, Patrick Habegger, Marcel Destraz, Eva De Leo, Norbert Meier, Nino Del Medico, Claudia Hoessbacher, Benedikt Baeuerle, Juerg Leuthold
Summary: We demonstrate plasmonic micro-racetrack modulators for high-speed intensity-modulated transmission. These modulators offer wide bandwidth, improved temperature stability, and no self-heating effects. They can encode electrical data onto wavelength-multiplexed optical carriers.
Article
Chemistry, Analytical
Kai-Ju Lin, Lon A. Wang
Summary: The three-slot waveguide sensor shows the best performance among one-, two- and three-slot waveguides at the mid-IR wavelength, with optimized geometry parameters for efficient transfer of single-mode light field sustained in the silicon cored fiber.
Article
Engineering, Electrical & Electronic
Tao Ma, Shaohui Liu, Yongsheng Tian, Heng Liu, Fang Wang
Summary: A graphene-hBN-silicon hybrid plasmonic rib waveguide is designed for refractive index sensing, achieving a high FOM value by optimizing size parameters and showing remarkable propagation performance peaks. The sensing structure demonstrates good sensitivity for homogeneous and surface sensing, making it suitable for ultra-compact on-chip micro-nano photonic biochemical sensing systems.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Parviz Saeidi, Bernhard Jakoby, Gerald Puhringer, Andreas Tortschanoff, Gerald Stocker, Jasmin Spettel, Florian Dubois, Thomas Grille, Reyhaneh Jannesari
Summary: This work investigates the optimization of a plasmonic slot waveguide (PSWG) in the mid-IR region, with a focus on a representative wavelength of 4.26 μm, which is the absorption line of CO2. The study analyzes the mode features of different structures and optimizes the PSWG based on a figure of merit (FOM) that considers confinement factor and propagation length. Attractive wavelengths and geometries that maximize the FOM are also identified for other wavelengths.
Article
Optics
Manuel Ackermann, Florian Merget, Jeremy Witzens
Summary: Silicon photonics ring resonators play a crucial role in wavelength-division-multiplexed communication networks. However, bending losses become unacceptable when the circumference is reduced below a few micrometers. This paper proposes the use of a sub-wavelength tunneling barrier at the critical radius to suppress these losses without significantly increasing the resonator's resistance.
Article
Engineering, Electrical & Electronic
Maryam Khodadadi, Najmeh Nozhat
Summary: The study examined the characteristics of a super-mode waveguide-fed nano-antenna using two methods, finite element and finite-difference time-domain, and analyzed short- and long-range fundamental TM super-modes of a symmetric hybrid plasmonic waveguide. The research confirmed the trade-off of loss-confinement in SHPW, resulting in horizontal and bidirectional radiation patterns for the nano-antenna due to the presence of in-phase and out-of-phase super-modes.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Review
Engineering, Electrical & Electronic
Chandresh Dhote, Anamika Singh, Santosh Kumar
Summary: This article reviews the remarkable development of biosensors in food quality monitoring, drug discovery, environmental monitoring, and other fields. It focuses on the advantages of integrated silicon photonic-based biosensors and discusses different device configurations and performance improvement strategies.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Amrita Pati, Reuven Gordon
Summary: Plasmonic slot waveguides offer extreme light confinement and have naturally present electrodes for switching and high thermal conductivity of the metal layers to remove excess heat. This study presents an analytical model of plasmonic slot waveguides that accurately determines the modal properties based on single-mode matching to continuum, with an accuracy of within 3% compared to rigorous numerical simulations. The theory enables rapid design and provides physical insight into mode propagation in plasmonic slot waveguides for various applications such as information processing, optical manipulation, and sensing.
Article
Materials Science, Multidisciplinary
Mingquan Pi, Huan Zhao, Chunguang Li, Yuting Min, Zihang Peng, Jialin Ji, Yijun Huang, Fang Song, Lei Liang, Yu Zhang, Yiding Wang, Frank K. Tittel, Chuantao Zheng
Summary: The problem of a traditional waveguide plasmonic resonator sensor is that part of the near-field intensity enhanced area is confined in the waveguide dielectric layer. In this study, a novel mid-infrared chalcogenide slot waveguide plasmonic resonator sensor embedded with Au nanorods was proposed to enhance the interaction between light and analyte. The proposed sensor provides a new idea for the design of high-performance waveguide plasmonic resonator sensors.
RESULTS IN PHYSICS
(2022)
Article
Chemistry, Analytical
Netanel Katash, Salman Khateeb, Dror Malka
Summary: This study proposes a 4 x 1 optical power combiner using a silicon nitride slot waveguide structure, which significantly increases the power level through light coupling propagation. The results show that the combiner has high efficiency and low back reflection in the O-band spectrum.
Article
Optics
Xinyu Su, Guolei Liu, Hongyan Yu, Dasai Ban, Niping Deng, Feng Qiu
Summary: This study presents an electro-optic polymer/silicon hybrid metasurface modulator with a high modulation bandwidth, utilizing a specially designed high-Q resonance structure for high-speed and low-energy applications in intelligent tunable metasurfaces and space optical communication.
Article
Optics
Jorge R. H. Fernandez, Yesica Rumaldo, Hugo E. Hernandez-Figueroa
Summary: This work presents the modal analysis and design considerations of a hybrid plasmonic waveguide (HPWG) based sensor, which shows high sensitivity and stability. The article analyzes the behavior of the hybrid modes in the structure and evaluates the impact of different materials on the sensing performance. The simulations based on 2D-FDTD solver demonstrate the potential of achieving high sensitivities and figures of merit (FOMs) in the reported cases.
OPTICS AND LASER TECHNOLOGY
(2022)
