Article
Optics
Abdulrahman Mesgin Balow, Mehdi Khatir, Nasrin Amiri
Summary: A novel plasmonic nano-antenna array with stepped strips at the edge of contact electrodes is proposed for improved performance in optical-to-terahertz conversion efficiency. Simulations show that this photoconductive antenna can efficiently transmit light to LT GaAs substrate under an optical pump power of 50 mW without any reflection, generating an optical current of 215 nA and achieving broadband terahertz detection over the 0.1-8 THz frequency range with significant improvement over previous structures.
Article
Optics
N. T. Yardimci, D. Turan, M. Jarrahi
Summary: The study introduces a photoconductive terahertz detector utilizing a plasmonic nanocavity, providing high sensitivity and broadband operation at very low optical pump power levels. This technology enables high-efficiency terahertz detection at extremely low optical power levels.
Article
Engineering, Electrical & Electronic
Reza Fatemi, Parham P. Khial, Aroutin Khachaturian, Ali Hajimiri
Summary: This paper studies the fundamental limits and trade-offs in nano-photonic antenna design, as well as how to improve antenna structures for enhanced performance. By deviating from conventional assumptions, high-performance multi-mode antenna structures with characteristics beyond traditional perceived limits are demonstrated.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Yi Xu, Baowei Gao, Axin He, Tongzhou Zhang, Jiasen Zhang
Summary: The study presents and experimentally demonstrates a cross-layered all-optical 3D router using optical slot antenna pairs to achieve nanoscale footprint routing, enabling arbitrary direction routing of plasmonic signals between different layers. This configuration paves the way for future research and applications of high integration density 3D plasmonic circuits.
Article
Engineering, Electrical & Electronic
Antonino Cala Lesina, Dominic Goodwill, Eric Bernier, Lora Ramunno, Pierre Berini
Summary: This study introduces a novel plasmonic pixel design for beam steering in LIDAR, with simulations predicting the control of reflection coefficient phase. The research also discusses the optical response mechanism, the impact of connectors, and strategies to maximize reflection coefficient magnitude and achieve dual-band operation.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Chang-gui Lu, Xue-fang Hu, Ze-rong Yuan, Yi-ping Cui
Summary: This paper presents a numerical method for nanoparticle transport using the optical force field over a plasmonic Au antenna array. By sequentially changing traps, nanoparticles can be handed off between adjacent traps and trapped and transferred stably. The method shows promising applications in biochemical diagnoses and high-accuracy optical manipulation.
Article
Engineering, Electrical & Electronic
Chi Wang, Shurun Tan, Xiao Lin, Hongsheng Chen, Fei Gao
Summary: Metagratings, based on subwavelength-aperture arrays (SAAs), manipulate electromagnetic waves and exhibit extraordinary optic transmission (EOT) in the far field and field enhancements (FEs) in the near field. By transplanting the concept of broadband light harvesting devices from optics to terahertz frequency, we design one-dimensional arrays of spirally textured metallic cylinders to achieve broadband THz EOTs and large field enhancements.
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2023)
Article
Chemistry, Multidisciplinary
Yuanwei Li, Ibrahim Tanriover, Wenjie Zhou, Wisnu Hadibrata, Sina Abedini Dereshgi, Devleena Samanta, Koray Aydin, Chad A. Mirkin
Summary: A synthetic strategy for preparing ultrathin, broadband metasurface absorbers is reported, which involves the surface-assembly of plasmonic octahedral nanoframes into large-area ordered monolayers. The resulting absorbers exhibit efficient light absorption across a wide range of wavelengths and are unaffected by polarization and incidence angles.
Article
Chemistry, Physical
Sasmita Dash, Goutam Soni, Amalendu Patnaik, Christos Liaskos, Andreas Pitsillides, Ian F. Akyildiz
Summary: This paper introduces a switched-beam graphene nanoantenna based on the Yagi-Uda antenna concept, capable of beam switching in different directions with reconfigurable frequency and pattern properties.
Article
Computer Science, Hardware & Architecture
Chong Han, Longfei Yan, Jinhong Yuan
Summary: This article investigates the challenges and features of THz hybrid beamforming design, discussing the poor spatial degree-of-freedom and blockage problems caused by extreme sparsity of the THz channel. It presents three novel THz-specific hybrid beamforming architectures and demonstrates the potential data rate, power consumption, and array gain capabilities for THz communications. Multiple open problems and potential research directions are elaborated as a roadmap of THz hybrid beamforming design.
IEEE WIRELESS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Sattar Othman Hasan, Saman Khabbat Ezzulddin, Hersh Ahmed Khizir, Muhamad Abdullah Hamad, Bushra Adnan Rahman
Summary: This article presents a systematic technique for designing a novel multiband plasmonic antenna based on graphene with a silicon nitride (SiO3N4) dielectric substrate in the terahertz band frequencies. The proposed antenna offers good frequency tunable features and is suitable for high-speed indoor wireless applications. The results show that the antenna size, gain, and bandwidth values achieved in this work are superior to those previously reported by other researchers.
Article
Materials Science, Multidisciplinary
Wenkuan Che, Jing Wu, Mingfei Cheng, Lu Xu, Jinghuai Fang
Summary: Metallic plasmonic nanostructures are widely explored for their unique optical controllability. A simple method for preparing Au@Ag plasmonic arrays was proposed through polymer-nanoimprinting, leading to uniform nanoarrays with controllable near-field enhancing properties. These nanoarrays were used as active SERS substrates with good signal homogeneity, providing a promising application prospect.
Article
Nanoscience & Nanotechnology
Qi Song, Yu Zhou, Yifei Wang, Feilong Gao, Jiatong Wang, Min Zhang, Yiran Wang, Bingyuan Zhang, Peiguang Yan, Bo Dong
Summary: Due to the low photon energy in the relevant frequency band, the development of 6G technology is limited by the lack of materials that can directly excite carriers and high-performance large-area detectors. Additionally, the integration of 6G communication and Internet of Things technology in flexible detectors has great potential for application in optoelectronic devices. A large-area flexible thin layer terahertz detector is designed to combine excellent optoelectronic performance and the localized surface plasmon effect in a sub-wavelength structure detector. The device demonstrates high performance at room temperature with good noise equivalent power and photoresponsivity at 0.28 THz, making it advantageous for flexible 6G detector applications.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Sotirios K. K. Goudos, Panagiotis D. D. Diamantoulakis, Mohammad A. A. Matin, Panagiotis Sarigiannidis, Shaohua Wan, George K. K. Karagiannidis
Summary: This study presents the applications of artificial intelligence in antenna design, covering various techniques such as evolutionary algorithms and machine learning, and summarizes the future research directions.
IEEE COMMUNICATIONS MAGAZINE
(2022)
Article
Chemistry, Analytical
Ja-Yu Lu, Po-Lun Chen, Borwen You
Summary: In this study, a 3D plasmonic structure based on a metal-coated woven-wire mesh (MCWM) was used for trace amount analyte sensing combined with THz spectroscopy. By experiment and numerical simulation, dual spectral features were observed in the transmission spectrum, and different types and quantities of analytes were successfully identified.
Article
Engineering, Electrical & Electronic
Deniz Turan, Sofia Carolina Corzo-Garcia, Nezih Tolga Yardimci, Enrique Castro-Camus, Mona Jarrahi
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
(2017)
Article
Nanoscience & Nanotechnology
Xurong Li, Nezih Tolga Yardimci, Mona Jarrahi
Article
Multidisciplinary Sciences
Xing Lin, Yair Rivenson, Nezih T. Yardimei, Muhammed Veli, Yi Luo, Mona Jarrahi, Aydogan Ozcan
Review
Chemistry, Multidisciplinary
Nezih Tolga Yardimci, Mona Jarrahi
Article
Physics, Applied
N. T. Yardimci, D. Turan, S. Cakmakyapan, M. Jarrahi
APPLIED PHYSICS LETTERS
(2018)
Article
Physics, Applied
E. C. Snively, N. T. Yardimci, B. T. Jacobson, M. Jarrahi, P. Musumeci, A. Murokh
APPLIED PHYSICS LETTERS
(2018)
Article
Multidisciplinary Sciences
Muhammed Veli, Deniz Mengu, Nezih T. Yardimci, Yi Luo, Jingxi Li, Yair Rivenson, Mona Jarrahi, Aydogan Ozcan
Summary: Recent advances in deep learning have provided non-intuitive solutions to inverse problems in optics. Diffractive networks merge wave-optics with deep learning to design task-specific elements for all-optically performing tasks like object classification. The authors present a diffractive network used to shape broadband pulses into desired optical waveforms, demonstrating direct pulse shaping in the terahertz spectrum.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Jingxi Li, Deniz Mengu, Nezih T. Yardimci, Yi Luo, Xurong Li, Muhammed Veli, Yair Rivenson, Mona Jarrahi, Aydogan Ozcan
Summary: The research demonstrates optical networks using diffractive layers trained by deep learning to encode spatial information into the power spectrum of diffracted light, achieving optical classification of handwritten digits in the terahertz spectrum. The spectral encoding coupled with an electronic neural network enables task-specific image decompression.
Article
Multidisciplinary Sciences
Deniz Turan, Ping Keng Lu, Nezih T. Yardimci, Zhaoyu Liu, Liang Luo, Joong-Mok Park, Uttam Nandi, Jigang Wang, Sascha Preu, Mona Jarrahi
Summary: Semiconductor surface states typically hinder device performance, but in this case, the authors utilize them to enable wavelength conversion. They demonstrate a compact, passive conversion device using plasmon-coupled surface states, achieving efficient conversion of optical frequencies without relying on nonlinear phenomena.
NATURE COMMUNICATIONS
(2021)
Article
Optics
N. T. Yardimci, D. Turan, M. Jarrahi
Summary: The study introduces a photoconductive terahertz detector utilizing a plasmonic nanocavity, providing high sensitivity and broadband operation at very low optical pump power levels. This technology enables high-efficiency terahertz detection at extremely low optical power levels.
Correction
Multidisciplinary Sciences
Deniz Turan, Ping Keng Lu, Nezih T. Yardimci, Zhaoyu Liu, Liang Luo, Joong-Mok Park, Uttam Nandi, Jigang Wang, Sascha Preu, Mona Jarrahi
NATURE COMMUNICATIONS
(2021)
Article
Plant Sciences
Marvin Browne, Megan K. Bartlett, Christian Henry, Mona Jarrahi, Grace John, Christine Scoffoni, Nezih Tolga Yardimci, Lawren Sack
Summary: Intra-specific trait variation (ITV) is important in various processes, but it is rarely quantified for ecophysiological traits such as PV curve parameters. This study found low ITV for PV parameters compared to other morphological traits and strong intraspecific relationships among PV traits, using a conservative sampling design.
PHYSIOLOGIA PLANTARUM
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Nezih Tolga Yardimci, Semih Cakmakyapan, Soroosh Hemmati, Mona Jarrahi
2017 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Nezih T. Yardimci, Mona Jarrahi
TERAHERTZ, RF, MILLIMETER, AND SUBMILLIMETER-WAVE TECHNOLOGY AND APPLICATIONS X
(2017)