Article
Engineering, Electrical & Electronic
Jung Han Choi, Nisarg Nijanandi
Summary: This paper presents a 120 GBd 2.8 V-pp, V-diff driver for InP Mach-Zehnder modulator (MZM) using 55-nm SiGe heterojunction bipolar transistor (HBTs). The output impedance of the driver is 2 x 25 Ohms, matched to the optical modulator. The measurements show a 3-dB bandwidth exceeding 67 GHz and an output P-1 dB of about 16.7 dBm at 1 GHz. Variable gain is implemented using the Gilbert-cell, with a measured gain variation of 2.1 dB. The power consumption is 960 mW. The impedance conversion integrated circuit (IC) is used to characterize the eye openings up to 120 GBd, with post-processing of the de-embedding resulting in a rail-to-rail voltage output of 2.8 V-pp, V-diff.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Optics
Sidong Fu, Yu Yu, Xinliang Zhang
Summary: The article proposes an electrical crosstalk suppression scheme for optical segmented modulators by introducing a complementary doped region as an insulator, successfully reducing the electrical crosstalk in the modulator and achieving an improvement in crosstalk.
Article
Optics
Ruogu Song, Jialiang Sun, Jinyu Wang, Xinyu Li, Yufei Liu, Wencheng Yue, Yan Cai, Shuxiao Wang, Mingbin Yu
Summary: We propose and experimentally demonstrate a novel compact folded Michelson interferometer (FMI) modulator with high modulation efficiency and small footprint. This modulator, by folding the phase shift arms and using shorter traveling wave electrode (TWE), reduces the propagation loss of the RF signal and exhibits excellent performance including low V p -L, low optical insertion loss, high extinction ratio, and wide bandwidth.
Article
Optics
Weihong Shen, Gangqiang Zhou, Jiangbing Du, Linjie Zhou, Ke Xu, Zuyuan He
Summary: This study demonstrates a silicon integrated microring modulator (MRM) with record high-speed performances at the 2 μm waveband, providing prospects for silicon photonic integration and high-speed interconnection at this wavelength. The analysis of optical bistability in the 2 μm MRM is also presented, guiding the design and experimental investigation of similar devices.
PHOTONICS RESEARCH
(2022)
Article
Optics
Yuguang Zhang, Hongguang Zhang, Junwen Zhang, Jia Liu, Lei Wang, Daigao Chen, Nan Chi, Xi Xiao, Shaohua Yu
Summary: This article presents an ultrafast microring modulator (MRM) with improved performance through optimized PN junction doping concentration. The MRM demonstrates the transmission of a 240 Gb/s PAM-8 signal over 2 km standard single-mode fiber (SSMF). By introducing optical peaking and using a titanium nitride heater, the electro-optic bandwidth of the MRM is further extended. High bit rate modulations, such as 120 Gb/s NRZ, 220 Gb/s PAM-4, and 240 Gb/s PAM-8, are achieved using the high-performance and compact MRM. The article also investigates the bit error ratio (BER) for different received optical power and 2 km SSMF transmission.
PHOTONICS RESEARCH
(2022)
Article
Optics
Gengxin Chen, Kaixuan Chen, Ranfeng Gan, Ziliang Ruan, Zong Wang, Pucheng Huang, Chao Lu, Alan Pak Tao Lau, Daoxin Dai, Changjian Guo, Liu Liu
Summary: This study demonstrates an ultra-large bandwidth electro-optic modulator based on the thin-film lithium niobate platform, which does not compromise the driving voltage and exhibits low loss and high bandwidth. By introducing a special etching technique and a traveling-wave electrode design, excellent performance is achieved.
Article
Optics
Xingrui Huang, Yang Liu, Zezheng Li, Huan Guan, Qingquan Wei, Manqing Tan, Zhiyong Li
Summary: The study presents a Michelson interferometer modulator with integrated Bragg reflectors on a silicon-rich nitride-thin-film lithium niobate hybrid platform, achieving high-speed modulation with the highest modulation bandwidth.
Article
Optics
Hao Chen, Zexing Zhao, Ziming Zhang, Guoqing Wang, Jiatong Li, Zhenyuan Shang, Mengyu Zhang, Kai Guo, Junbo Yang, Peiguang Yan
Summary: This study demonstrates a phase modulator based on a micro-ring resonator integrated with few-layer MoS2. The effective index of the composite MoS2-SiN waveguide can be modulated by adjusting bias voltages, and the coupling condition between the micro-ring resonator and the bus waveguide can also be engineered during the charged doping process.
PHOTONICS RESEARCH
(2022)
Article
Optics
P. E. N. G. H. U. Xia, H. U. Yu, M. I. N. G. X. I. A. N. G. Yang, N. A. I. D. I. Cui, H. A. I. J. U. N. Liao, Q. I. A. N. G. Zhang, Z. H. I. L. E. I. Fu, Q. I. K. A. I. Huang, N. A. N. N. A. N. Ning, Z. H. U. J. U. N. Wei, X. I. A. O. Q. I. N. G. Jiang, J. I. A. N. Y. I. Yang
Summary: We present a single-chip silicon optical single sideband (OSSB) modulator consisting of a radio frequency (RF) branch line coupler (BLC) and a silicon dual-parallel Mach-Zehnder modulator (DP-MZM). By co-designing the BLC and DP-MZM, we achieved improved sideband suppression ratio (SSR). The modulator exhibited a modulation efficiency of 1.75 V·cm and a 3 dB electro-optical (EO) bandwidth of 48.7 GHz.
PHOTONICS RESEARCH
(2023)
Article
Optics
Hengsong Yue, Kaizhong Chen, Tao Chu
Summary: This paper presents a high-linearity dual-drive scheme using a single silicon dual-drive Mach-Zehnder modulator. The nonlinearity of the transfer function of the Mach-Zehnder interferometer is cancelled out by adjusting the bias voltages and RF amplitudes of the two driving arms. The proposed scheme achieves a record-breaking spurious-free dynamic range of 123.4 dB Hz6/7 for third-order intermodulation distortion, compared to 102.6 dB·Hz2/3 obtained using a conventional single-drive scheme. This scheme simplifies the design of modulators and promotes high-performance microwave photonic links.
Article
Optics
Pan Ying, Heyun Tan, Junwei Zhang, Mingbo He, Mengyue Xu, Xiaoyue Liu, Renyou Ge, Yuntao Zhu, Chuan Liu, Xinlun Cai
Summary: A thin-film lithium-niobate-on-insulator platform has been demonstrated for optical interconnect and nonlinear optics applications, showing potential for energy-efficient large-capacity optical interconnects. The edge-coupling Mach-Zehnder modulator on this platform exhibits low fiber-chip coupling loss, high EO bandwidth, and efficient thermal-optic phase shifter, enabling single-lane 200 Gbit/s data transmission.
Article
Optics
Kuldeep Choudhary, Santosh Kumar
Summary: With the development of plasmonic optical waveguides, a Feynman logic gate design based on metal-insulator-metal optical waveguide has been proposed, showing superior performance compared to conventional electro-optic Feynman logic gates.
Article
Optics
Penghui Xia, Hui Yu, Qiang Zhang, Xiaofei Wang, Zhilei Fu, Qikai Huang, Nannan Ning, Zhujun Wei, Xiaoqing Jiang, Jianyi Yang
Summary: In this study, we demonstrate a high efficiency, high linearity, and high-speed silicon Mach-Zehnder modulator based on the DC Kerr effect enhanced by slow light. The modulator exhibits low insertion loss, wide bandwidth, and excellent modulation linearity.
Article
Engineering, Electrical & Electronic
M. Kohli, D. Chelladurai, A. Messner, Y. Horst, D. Moor, J. Winiger, T. Blatter, T. Buriakova, C. Convertino, F. Eltes, M. Zervas, Y. Fedoryshyn, U. Koch, J. Leuthold
Summary: This paper presents a high-speed plasmonic barium titanate (BTO, BaTiO3) Mach-Zehnder modulator. The modulator combines nanoscale plasmonics with BTO as solid-state active material and silicon nitride (SiN) for waveguiding, and integrates them in a monolithic platform. Experimental results show that the modulator has a flat electro-optic frequency response up to 70 GHz and a low V pi L product of 144 V mu m. The modulator can achieve data rates of 216 Gbit/s with a 216GBd 2PAM signal and 256 Gbit/s with a 128GBd 4PAM signal. The integration of the silicon nitride platform with high-speed plasmonics using BTO is a promising solution for future Tb/s optical interconnect platforms.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Rubab Amin, Jonathan K. George, Hao Wang, Rishi Maiti, Zhizhen Ma, Hamed Dalir, Jacob B. Khurgin, Volker J. Sorger
Summary: The increasing demand for machine intelligence is driving innovations in photonic ASIC solutions, combining optical operations and nonlinear functions with challenges in data throughput and delay. Further advancements in light-matter interactions are needed to improve system performance.
Article
Engineering, Electrical & Electronic
Yannik Horst, Tobias Blatter, Laurenz Kulmer, Bertold Ian Bitachon, Benedikt Baeuerle, Marcel Destraz, Wolfgang Heni, Stefan Koepfli, Patrick Habegger, Marco Eppenberger, Eva de Leo, Claudia Hoessbacher, Delwin L. Elder, Scott R. Hammond, Lewis E. Johnson, Larry R. Dalton, Yuriy Fedoryshyn, Yannick Salamin, Maurizio Burla, Juerg Leuthold
Summary: A novel transparent optical subTHz-optical link is demonstrated, achieving high data transmission rates and showcasing direct conversion and mapping techniques for signals.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Huajun Xu, Delwin L. Elder, Lewis E. Johnson, Wolfgang Heni, Yovan de Coene, Eva De Leo, Marcel Destraz, Norbert Meier, Wouter Vander Ghinst, Scott R. Hammond, Koen Clays, Juerg Leuthold, Larry R. Dalton, Bruce H. Robinson
Summary: This study demonstrates the enhancement of in-device electro-optic activity by utilizing theory-inspired organic electro-optic chromophores, showing significant improvement in optical properties and electro-optic coefficients compared to current state-of-the-art chromophores. The results suggest potential for practical applications in advanced electro-optic devices.
MATERIALS HORIZONS
(2022)
Article
Engineering, Electrical & Electronic
Bertold Ian Bitachon, Marco Eppenberger, Benedikt Baeuerle, Juerg Leuthold
Summary: A method for reducing the training time of DL-DBP is proposed by dividing the link into smaller sections. The experiment shows that the proposed method provides a gain in compensation performance compared to linear schemes, at the cost of increased training time.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Qian Hu, Robert Borkowski, Yannick Lefevre, Junho Cho, Fred Buchali, Rene Bonk, Karsten Schuh, Eva De Leo, Patrick Habegger, Marcel Destraz, Nino Del Medico, Hamit Duran, Valentino Tedaldi, Christian Funck, Yuriy Fedoryshyn, Juerg Leuthold, Wolfgang Heni, Benedikt Baeuerle, Claudia Hoessbacher
Summary: This article summarizes the experimental exploration of an ultrabroad-bandwidth plasmonic Mach-Zehnder modulator in a short-reach optical transmission system. The modulation, transmission, and reception performance under different schemes are studied, and specific bit rates are provided.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Bojun Cheng, Till Zellweger, Konstantin Malchow, Xinzhi Zhang, Mila Lewerenz, Elias Passerini, Jan Aeschlimann, Ueli Koch, Mathieu Luisier, Alexandros Emboras, Alexandre Bouhelier, Juerg Leuthold
Summary: This paper reports the observation of a novel feature in Ag/amorphous-SiOx/Pt memristors, namely the appearance of new photoluminescent centers upon memristive switching, correlated with conductance changes.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Raphael Schwanninger, Stefan M. Koepfli, Olesya Yarema, Alexander Dorodnyy, Maksym Yarema, Annina Moser, Shadi Nashashibi, Yuriy Fedoryshyn, Vanessa Wood, Juerg Leuthold
Summary: We demonstrate compact and efficient photodetectors operating at room temperature in a wavelength range of 2710-4250 nm with high responsivities of 375 and 4 A/W. The key to their high performance is the combination of a sintered colloidal quantum dot (CQD) heterojunction photoconductor and a metallic metasurface perfect absorber. The combination results in a 20-fold increase in responsivity compared to reference photoconductors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Jan Aeschlimann, Fabian Ducry, Christoph Weilenmann, Juerg Leuthold, Alexandros Emboras, Mathieu Luisier
Summary: We present a multiscale simulation framework for metal-oxide-metal structures in conductive bridging random-access memory (CBRAM). The framework utilizes a finite-element model with input parameters extracted from ab initio or machine-learned empirical calculations. The model includes techniques such as molecular dynamics, nudged elastic band, electronic transport, and thermal quantum transport. Experimental data of an Ag/a-SiO2/Pt CBRAM is well reproduced using this framework. Joule heating is found to be significant in devices with thin conductive filaments and current concentrations in the tens-microampere range.
PHYSICAL REVIEW APPLIED
(2023)
Article
Nanoscience & Nanotechnology
Miklos Csontos, Yannik Horst, Nadia Jimenez Olalla, Ueli Koch, Ivan Shorubalko, Andras Halbritter, Juerg Leuthold
Summary: The resistance state of filamentary memristors can be adjusted by relocating a few atoms in the active region of the conducting filament. The technology shows promise in downsizing, energy efficiency, and speed. However, the mechanisms and limitations of ultra-fast resistive switching need to be clarified for high-frequency applications. In this study, bipolar, multilevel resistive switchings were investigated in tantalum pentoxide based memristors with picosecond time resolution.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Larry R. Dalton, Juerg Leuthold, Bruce H. Robinson, Christian Haffner, Delwin L. Elder, Lewis E. Johnson, Scott R. Hammond, Wolfgang Heni, Claudia Hosessbacher, Benedikt Baeuerle, Eva De Leo, Ueli Koch, Patrick Habegger, Yuriy Fedoryshyn, David Moor, Ping Ma
Summary: The growth of integrated photonics has led to the demand for efficient electrical-to-optical signal conversion and photodetection over a wide range of frequencies. Nanophotonic devices with small feature sizes enable high-performance materials to be utilized to their maximum potential. Hybrid organic/semiconductor nanophotonic integration has improved understanding of material properties and provided stable alternatives to traditional thermoplastic EO polymers. The interrelationship between hybrid device architectures and materials needs to be considered for further advancements.
Article
Engineering, Electrical & Electronic
Hande Ibili, Tobias Blatter, Michael Baumann, Laurenz Kulmer, Boris Vukovic, Jasmin Smajic, Juerg Leuthold
Summary: This article introduces a theory and equivalent circuit models for designing and optimizing plasmonic modulator antennas. The proposed models aim to improve the understanding of the powerful antenna field enhancement and provide optimized antenna structures and parameters.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Michal Maciejewski, Bernhard Auchmann, Douglas Martins Araujo, Giorgio Vallone, Juerg Leuthold, Jasmin Smajic
Summary: This paper presents a methodology for collaborative modeling based on model-based systems engineering. The methodology consists of three pillars: encapsulated computing environments with service query interface, model notebooks with auto-generated model views, and model query interface with results caching. The methodology aims to achieve decentralized multi-model and multi-scale collaboration while maintaining traceability and reproducibility. It is demonstrated with a multi-model coil design optimization of a high-field superconducting magnet.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Review
Optics
Alexander Dorodnyy, Jasmin Smajic, Juerg Leuthold
Summary: Mie scattering is used to manipulate electromagnetic fields for various applications such as strong resonant enhancement, perfect absorption of radiation, and polarization/wavelength selectivity. Recent applications include light spectrum control, detection, non-linear effects enhancement, and emission. It is also demonstrated that a periodic arrangement of Mie scatterers can lead to a significant absorption enhancement in weakly absorbing layers.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Ulle-Linda Talts, Helena C. Weigand, Gregoire Saerens, Peter Benedek, Joel Winiger, Vanessa Wood, Jurg Leuthold, Viola Vogler-Neuling, Rachel Grange
Summary: Researchers demonstrate a nanoimprinted nonlinear barium titanate 2D nanohole array that exhibits optical properties of a 2D photonic crystal and a metasurface. The structure is achieved through soft nanoimprint lithography, with enhanced second-harmonic generation by a factor of 18, showcasing the potential of this technique in flexible fabrication of barium titanate photonic devices.
Proceedings Paper
Engineering, Electrical & Electronic
David Moor, Yuriy Fedoryshyn, Henning Langenhagen, Jens Muellrich, Rolf Schmid, Christopher Uhl, Michael Moeller, Ueli Koch, Yannik Horst, Bertold Bitachon, Wolfgang Heni, Benedikt Baeuerle, Marcel Destraz, Huajun Xu, L. Elder Delwin, Lewis E. Johnson, Paraskevas Bakopoulos, Elad Mentovich, Lars Zimmermann, Juerg Leuthold
Summary: A monolithically integrated plasmonic SiGe-BiCMOS electronic transmitter operating at 180 GBd is demonstrated, which is a key component for future high-performance computing and data center interconnects.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
