Article
Multidisciplinary Sciences
Ileana-Cristina Benea-Chelmus, Maryna L. Meretska, Delwin L. Elder, Michele Tamagnone, Larry R. Dalton, Federico Capasso
Summary: Researchers have developed an SLM device based on organic electro-optic materials that can manipulate individual pixel properties at speeds up to 50 MHz, offering potential applications in imaging and spectroscopy. These materials exhibit high nonlinearity, custom-tailored nonlinear tensors at the nanoscale, and have broad applications in active free-space optics, such as remote monitoring and virtual or augmented reality. The compatibility with compact laser diodes, achieved millimeter size, and low power consumption make them suitable for laser ranging and reconfigurable optics.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Brian S. Lee, Bumho Kim, Alexandre P. Freitas, Aseema Mohanty, Yibo Zhu, Gaurang R. Bhatt, James Hone, Michal Lipson
Summary: Graphene-based electro-optic modulators demonstrate higher bandwidth and performance at low temperatures, offering a solution to the reduced bandwidth issue of existing integrated modulators in cryogenic applications.
Article
Multidisciplinary Sciences
Keith Powell, Liwei Li, Amirhassan Shams-Ansari, Jianfu Wang, Debin Meng, Neil Sinclair, Jiangdong Deng, Marko Loncar, Xiaoke Yi
Summary: The authors demonstrate an electro-optic modulator based on Silicon Carbide, which shows promising potential for quantum and optical communications. The modulator is fabricated using a CMOS foundry compatible process, and features small form-factor, high bandwidth, and stable operation.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Shixin Xue, Zhimin Shi, Jingwei Ling, Zhengdong Gao, Qili Hu, Kaibo Zhang, Gareth Valentine, Xi Wu, Jeremy Staffa, Usman A. Javid, Qiang Lin
Summary: We present an on-chip high-speed visible-band electro-optic modulator that covers the entire visible spectrum of 400-700 nm. It achieves record low V-pi center dot L values of 0.48, 0.25, and 0.17 V center dot cm at red, green, and blue wavelengths of 630, 520, and 450 nm, respectively, with an operating bandwidth exceeding 20 GHz.
Article
Optics
Bingcheng Pan, Hongyuan Cao, Yishu Huang, Zong Wang, Kaixuan Chen, Huan Li, Zejie Yu, Daoxin Dai
Summary: This article presents a high-performance lithium niobate electro-optic modulator based on a new 2 x 2 Fabry-Perot cavity. It features a compact footprint, low power consumption, and high modulation speeds, making it promising for high-speed data transmission and signal processing.
PHOTONICS RESEARCH
(2022)
Article
Optics
Xiaolei Lv, Jiguang Zhao, Xuping Wang, Xiaoping Du, Bing Liu, Yishuo Song, Hang Chen
Summary: This study investigates the dynamic response of the dielectric constant of a KTN crystal to an electric field at different frequencies, and proposes a method to maximize modulation contrast based on the transmittance derivative function. The verification experiment demonstrates that the proposed optimization method effectively achieves a maximum modulation contrast under specific electric field conditions.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Chemistry, Analytical
Zihan Zhou, Meng Chao, Xinxin Su, Shuanglin Fu, Ruonan Liu, Zhihua Li, Shuhui Bo, Zhuo Chen, Zhenlin Wu, Xiuyou Han
Summary: This paper presents an SOH-integrated electro-optic modulator (EOM) and investigates its structure design, silicon waveguide fabrication, on-chip poling of organic electro-optic material, and modulation response characterization. The experimental results demonstrate that the SOH-integrated EOM has a high bandwidth, low power consumption, and can be used in microwave photonic phase shifter.
Article
Nanoscience & Nanotechnology
Zhuang Ren, Jinyi Xu, Jinming Liu, Bolin Li, Chun Zhou, Zhigao Sheng
Summary: This article demonstrates an active and smart electro-optic terahertz modulator based on strongly correlated electron oxide vanadium dioxide. By applying an external electric field, the transmission, reflection, absorption, and phase of terahertz waves can be efficiently modulated, with the ability to stabilize the antireflection condition.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Optics
Renjie Li, Ming Chen, Xinyu Shi, Wenhao Han, Xiangyang Wang, Wanli Zhao, Jinbiao Liu, Chuanxin Teng, Shijie Deng, Yu Cheng, Libo Yuan
Summary: This paper presents a compact, low-loss electro-optic modulator that utilizes graphene for phase and absorption modulation. It achieves high modulation efficiency, low insertion loss, and low energy consumption, making it suitable for designing high-performance optical communication network devices.
Article
Optics
Paolo Pintus, Anshuman Singh, Weoqiang Xie, Leonardo Ranzani, Martin V. Gustafsson, Minh A. Tran, Chao Xiang, Jonathan Peters, John E. Bowers, Moe Soltani
Summary: Photonic integrated circuits (PICs) at cryogenic temperatures have a wide range of applications in computing and sensing. By using a low-temperature modulator, optical interconnects can be realized to address the limitations of bulky coaxial cables in cryogenic systems. This study demonstrates a compact optical ring resonator modulator with low driving voltage and high-speed data transmission at low temperatures, paving the way for complex cryogenic photonic functionalities and massive data transmission between cryogenic and room-temperature electronics.
Article
Optics
Tanmay Bhowmik, Bhairov Kr. Bhowmik, Pranav Kr. Pandey, Gagan Kumar, Debabrata Sikdar
Summary: By engineering meta-atoms, tunable metamaterials have opened up new possibilities for active control of light absorption. In this study, a broadband electrically-tunable metamaterial absorber is proposed for simultaneous modulation of reflected light amplitude in the O-band and C-band. Through the coupling of gap plasmon resonance and epsilon-near-zero phenomenon, real-time control of reflected light amplitude is achieved. The proposed metamaterial absorber demonstrates more than 80% absorption over a 370 nm spectral window and allows for amplitude modulation with high extinction ratios at specific wavelengths.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Yanli Xu, Chuan Zhang, Weimin Li, Rong Li, Jiangtao Liu, Ze Liu, Zhenhua Wu
Summary: An ultraviolet electro-optic modulation system based on graphene-plasmonic metamaterials nanomechanical system (NEMS) with superlubricity has been investigated. The system achieves a high modulation depth and fast response speed due to the strong optical absorption intensity of graphene and the combination of metamaterial structure based on surface plasmons.
Article
Optics
Jiawei Mao, Hiromu Sato, Guo-Wei Lu, Shiyoshi Yokoyama
Summary: In this study, a silicon-loaded LN modulator on the insulator substrate is designed and fabricated, featuring a small footprint, a low driving voltage, and high-speed EO modulation. No etching or patterning of the LN is required. The fabricated LN modulator has a high modulation bandwidth and supports high-speed signaling.
Article
Optics
Jiawei Mao, Hiromu Sato, Alisa Bannaron, Jianxun Hong, Guo-Wei Lu, Shiyoshi Yokoyama
Summary: Efficient electro-optic modulation is achieved in a hybrid silicon modulator using an EO polymer in an in-plane coplanar waveguide and electrode structure. The strong confinement of the optical field in the hybrid structure enables efficient electric poling and modulation of the EO polymer. The study investigates the volume resistivity dependence of the efficiency of electric poling and modulation for different side-cladding materials. Experimental results demonstrate the high-speed signaling capability of the device, achieving on-off-keying transmission at signal rates up to 52 Gbit/s with a high Q factor.
Article
Optics
Jeong Hyun Huh, Zaijun Chen, Edoardo Vicentini, Theodor W. Haensch, Nathalie Picque
Summary: This study conducted time-resolved near-infrared absorption spectroscopy of single non-repeatable transient events with a dual-comb interferometer, achieving high spectral resolution and up to 50 s of mutual coherence time without active stabilization system. The time resolution was as short as 100 ms in the experimental demonstration, enabling precise determination of rovibrational line parameters.
Review
Engineering, Chemical
Delwin L. Elder, Larry R. Dalton
Summary: The performance of electro-optic devices based on organic second order NLO materials has been significantly improved through theory-guided improvement and device compression techniques, leading to record-breaking performance in terms of voltage-length performance, energy consumption, bandwidth, and device size.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(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
Jasmin Smajic, Arif Can Gungor, Hande Ibili, Michal Maciejewski, Juerg Leuthold
Summary: This article addresses the difficulty of result verification in strongly coupled electromagnetic-mechanical problems and provides reference examples with analytical solutions. The obtained solutions were validated with an in-house developed solver, showing excellent agreement.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Engineering, Electrical & Electronic
Arif Can Gungor, Michael Doderer, Hande Ibili, Jasmin Smajic, Juerg Leuthold
Summary: This study models and simulates the generation of terahertz electrical signals from a photoactive semiconductor device illuminated by an optical pulse. By numerically solving the hydrodynamic equations in time domain, the authors obtained the frequency spectra of photocurrent in various semiconductor materials. The results show that the inertia effects and ballistic transport of carriers play an important role in determining the frequency response of these materials. The developed hydrodynamic model also predicts higher and wideband frequency capabilities for GaAs and Ge detectors compared to Si-photodetectors.
IEEE TRANSACTIONS ON MAGNETICS
(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.
