Article
Optics
Hanke Feng, Ke Zhang, Wenzhao Sun, Yangming Ren, Yiwen Zhang, Wenfu Zhang, Cheng Wang
Summary: This research demonstrates a highly linear lithium niobate (LN) modulator with an ultra-high spurious-free dynamic range (SFDR) using a ring-assisted Mach-Zehnder interferometer configuration. The modulation does not require active feedback controls to suppress third-order intermodulation distortions (IMD3), resulting in a significant improvement over previous results in the thin-film LN platform.
PHOTONICS RESEARCH
(2022)
Review
Physics, Applied
Fuhao Yu, Zhaobang Zeng, Xiang Ji, Kaifei Tang, Yu Xin, Guihan Wu, Dun Mao, Tingyi Gu, Qingzhong Huang, Wei Jiang
Summary: This paper reviews the progress of electro-optic modulators composed of silicon-based microscopic photonic structures. The basic principles, device structures, and advanced modulation capability of different geometric types are detailed for micro-ring modulators, photonic crystal modulators, and other related modulators. The article discusses the impacts of these modulators on speed, power consumption, and thermal stabilities, as well as the challenges, further directions, and emerging possibilities for microscopic photonic structure-based silicon modulators.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Review
Nanoscience & Nanotechnology
Tianqi Xu, Yuan Dong, Qize Zhong, Shaonan Zheng, Yang Qiu, Xingyan Zhao, Lianxi Jia, Chengkuo Lee, Ting Hu
Summary: This paper reviews the integrated mid-infrared (MIR) electro-optic (EO) modulators based on different modulation mechanisms and material platforms in MIR photonics. The recent research progress, challenges, and applications of MIR EO modulators are presented and discussed. Several areas in integrated MIR modulators that are worth researching in the future are also provided.
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
Computer Science, Information Systems
Yonghua Wang, Lei Lei, Junbin Zang, Wenchan Dong, Xinliang Zhang, Ping Xu
Summary: The graphene-assisted tapered silicon ring resonator provides an efficient solution for electro-optic modulation, achieving high modulation depth by greatly enhancing the interaction between graphene and light.
Article
Chemistry, Analytical
Changhao Han, Ming Jin, Yuansheng Tao, Bitao Shen, Xingjun Wang
Summary: Silicon photonics, as an important optoelectronic integration platform, has advantages of low power consumption, low cost, and CMOS compatibility. However, conventional silicon modulators have limitations, leading to the need for new structures to improve their performance. Slow-light effect, which reduces the group velocity of light, is an attractive research point for reducing the device footprint. This paper reviews the recent progress of silicon-based slow-light electro-optic modulators and discusses the challenges and development directions for practical applications.
Article
Optics
Tianren Fan, Xi Wu, Sai R. M. Vangapandu, Amir H. Hosseinnia, Ali A. Eftekhar, Ali Adibi
Summary: This study demonstrates integrated electro-optic phase shifters based on 3C silicon-carbide-on-insulator platform operating at near-infrared wavelengths, showing optical performance and electro-optic coefficient. The SiCOI platform can be utilized for tunable silicon carbide integrated photonic devices suitable for nonlinear and quantum photonics applications.
Review
Optics
Mian Zhang, Cheng Wang, Prashanta Kharel, Di Zhu, Marko Loncar
Summary: Thin-film lithium niobate has emerged as a strong contender for next-generation electro-optic modulators due to its high efficiency, performance stability, and scalability.
Article
Engineering, Electrical & Electronic
Srinivasa Reddy Tamalampudi, Ghada Hamed Dushaq, Juan E. Villegas, Bruna Paredes, Mahmoud S. Rasras
Summary: In this study, the tuning of the optical index of refraction based on hybrid integration of multi-layered anisotropic GaGeTe on a silicon micro-ring resonator (Si-MRR) is demonstrated. The device exhibits a linear resonance shift under TE polarization and both amplitude and phase modulation under TM polarization. The device also shows good dynamic RF response and has great potential for integrated photonic applications on the silicon photonics platform.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Agham B. Posadas, Hyoju Park, Marc Reynaud, Wei Cao, Jamie D. Reynolds, Wei Guo, Vadivukkarasi Jeyaselvan, Ilya Beskin, Goran Z. Mashanovich, Jamie H. Warner, Alexander A. Demkov
Summary: Thick epitaxial BaTiO3 films were successfully grown by off-axis RF magnetron sputtering on SrTiO3-templated silicon-on-insulator (SOI) substrates. The films exhibit high quality and fast growth rates compared to those grown by molecular beam epitaxy (MBE). Analysis of lattice parameters revealed changes in in-plane and out-of-plane lattice spacings within the thick films, with sputtered films retaining their out-of-plane polarization orientation for larger thicknesses. Additionally, a method for achieving 100% a-axis-oriented films was studied, although resulting films showed voids and misoriented grains. Electro-optic measurements demonstrated high Pockels coefficients for the sputtered BTO films, indicating their potential use in integrated electro-optic modulators for Si photonics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Ming Jin, Ziyi Wei, Yanfang Meng, Haowen Shu, Yuansheng Tao, Bowen Bai, Xingjun Wang
Summary: This paper summarizes the developments in silicon-based graphene EO modulators, highlighting their potential applications in optical communications and microwave photonics. It discusses the challenges and potential future applications for silicon-based graphene EO modulators.
Review
Materials Science, Multidisciplinary
Alberto Tibaldi, Mohammadamin Ghomashi, Francesco Bertazzi, Michele Goano, Marco Vallone, Giovanni Ghione
Summary: This paper provides an overview of physics-based and system-oriented modeling of organic electro-optic Mach-Zehnder modulators for optical communication systems. It reviews state-of-the-art solutions in electro-optic organic materials and modulator designs, with emphasis on silicon organic hybrid and plasmonic organic hybrid solutions. The paper discusses physics-based simulation of concentrated and traveling-wave modulators through 3D optical simulations and a combination of 2D and 3D models, as well as neural network behavioral models for SOH and POH Mach-Zehnder modulators.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Optics
Guozhen Liang, Heqing Huang, Aseema Mohanty, Min Chul Shin, Xingchen Ji, Michael Joseph Carter, Sajan Shrestha, Michal Lipson, Nanfang Yu
Summary: The study presents visible-spectrum silicon nitride thermo-optic phase modulators based on adiabatic micro-ring resonators, which offer a one-order-of-magnitude reduction in both device footprint and power consumption compared to waveguide phase modulators. These modulators provide 1.6 pi phase modulation with minimal amplitude variations and improved robustness against fabrication variations.
Article
Optics
Feng Qiu, Yu Han
Summary: Electro-optic (EO) ring resonator modulators are versatile devices with applications in communication and scientific fields, especially those utilizing EO polymers with high EO coefficients and ultrafast response times. Research in this area focuses on the operation principles, modulation mechanisms, and improvement of EO modulation in ring modulators using EO polymers as the waveguide core. Additionally, advancements in EO polymers on silicon platforms, such as slot modulators and athermal modulators, are also reviewed.
CHINESE OPTICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Laurens Breyne, Joris Lambrecht, Michiel Verplaetse, Xin Yin, Gunther Roelkens, Peter Ossieur, Johan Bauwelinck
Summary: A novel method is introduced to embed finite-impulse-response filters in slow-wave Mach-Zehnder modulators, allowing the adjustment of the electro-optic frequency response to designer's needs. The position of delay lines and crossings, along with the length of delay lines in the modulator, determine the final response. Experimental validation on a silicon photonic modulator and C-band transmission experiments demonstrate the effectiveness of this technique.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Review
Optics
Yuning Zhang, Jiayang Wu, Linnan Jia, Yang Qu, Yunyi Yang, Baohua Jia, David J. Moss
Summary: Integrated photonic devices operating via optical nonlinearities offer a powerful solution for all-optical information processing, and graphene oxide (GO) has attracted significant attention for its large optical nonlinearity and facile fabrication processes. This paper reviews the applications of GO to nonlinear integrated photonics, including its optical properties, fabrication technologies, and the state-of-the-art GO nonlinear integrated photonic devices. The challenges and future opportunities in this field are also discussed.
LASER & PHOTONICS REVIEWS
(2023)
Review
Chemistry, Analytical
Linnan Jia, Jiayang Wu, Yuning Zhang, Yang Qu, Baohua Jia, David J. Moss
Summary: This paper reviews the recent advances in research on third-order optical nonlinearities of two-dimensional (2D) materials in optical communication systems. The material properties and characterization methods of 2D materials are discussed, along with a summary of the measured n(2) values in the telecommunications band. The current challenges and future perspectives are also discussed.
Review
Nanoscience & Nanotechnology
Yunping Bai, Xingyuan Xu, Mengxi Tan, Yang Sun, Yang Li, Jiayang Wu, Roberto Morandotti, Arnan Mitchell, Kun Xu, David J. Moss
Summary: The simultaneous advances in artificial neural networks and photonic integration technologies have spurred extensive research in optical computing and optical neural networks (ONNs). The potential to simultaneously exploit multiple physical dimensions of time, wavelength and space give ONNs the ability to achieve computing operations with high parallelism and large-data throughput. Different photonic multiplexing techniques based on these multiple degrees of freedom have enabled ONNs with large-scale interconnectivity and linear computing functions. This article reviews the recent advances of ONNs based on different approaches to photonic multiplexing, and presents an outlook on key technologies needed to further advance these photonic multiplexing/hybrid-multiplexing techniques of ONNs.
Article
Materials Science, Multidisciplinary
Yuning Zhang, Jiayang Wu, Yunyi Yang, Yang Qu, Linnan Jia, Houssein El Dirani, Sebastien Kerdiles, Corrado Sciancalepore, Pierre Demongodin, Christian Grillet, Christelle Monat, Baohua Jia, David J. J. Moss
Summary: Enhanced supercontinuum generation is achieved in silicon nitride waveguides by incorporating highly nonlinear graphene oxide films. The films are integrated on-chip using a transfer-free and layer-by-layer coating method. Detailed measurements demonstrate significantly improved spectral broadening, reaching up to 2.4 times improvement in bandwidth compared to devices without graphene oxide.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Chemistry, Multidisciplinary
Jiayang Wu, Han Lin, David J. Moss, Kian Ping Loh, Baohua Jia
Summary: Graphene oxide (GO) was initially developed as a graphene mimic, but has since been recognized as a functional material with its own unique properties. Research on GO in the past decade has greatly advanced material synthesis and property tailoring, leading to rapid progress in GO-based photonics, electronics, and optoelectronics. This review provides an overview of the optical, electrical, and optoelectronic properties of GO and reduced GO, as well as their applications in key technologies such as solar energy harvesting, energy storage, medical diagnosis, image display, and optical communications. The challenges and exciting opportunities for future technological advances in this field are also discussed.
NATURE REVIEWS CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Linnan Jia, Chang-Fu Huo, Xiao-Qing Yan, Jiayang Wu, Yu-Zhe Zhang, Yunyi Yang, Wenxiong Xu, Qiannan Cui, Daohong Song, Baohua Jia, Zhi-Bo Liu, Zhigang Chen, David J. Moss
Summary: This study reports on the ultrafast carrier dynamics of niobium ditelluride (NbTe2) measured using time-resolved pump-probe transient reflection spectroscopy. The thickness-dependent carrier relaxation time and the effect of pump power on carrier dynamics are observed, and the isotropic relaxation dynamics in NbTe2 are verified.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Xingyuan Xu, Weiwei Han, Mengxi Tan, Yang Sun, Yang Li, Jiayang Wu, Roberto Morandotti, Arnan Mitchell, Kun Xu, David J. Moss
Summary: Optical neural networks (ONNs) based on wavelength-division multiplexing (WDM) techniques offer high bandwidth and analog architecture for enhanced computing power and energy efficiency. Integrated microcombs have been used to implement ONNs, with successful applications such as optical convolution accelerators for human image processing at 11 Tera operations per second. However, challenges and limitations of ONNs still need to be addressed for future applications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Review
Physics, Applied
Hamed Arianfard, Saulius Juodkazis, David J. Moss, Jiayang Wu
Summary: Sagnac interference, as a fundamental optical approach, is widely used for reflection manipulation, precision measurements, and spectral engineering. The integration fabrication techniques have enabled chip-scale Sagnac interferometers, which offer advantages in terms of reduced complexity and high stability. This paper reviews the theory, applications, and challenges of functional integrated photonic devices based on Sagnac interference.
APPLIED PHYSICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Yang Sun, Jiayang Wu, Yang Li, Mengxi Tan, Xingyuan Xu, Sai Tak Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss
Summary: Photonic RF transversal signal processors, implemented with photonic technologies, offer high-speed information processing with reduced size, power consumption, and complexity. Optical microcombs generated from compact micro-resonators are ideal sources for RF photonics. This study provides a detailed analysis of the processing accuracy of microcomb-based photonic RF transversal signal processors. Theoretical limitations, practical error sources, and the relative contributions of both are investigated, highlighting the potential for further error reduction through feedback control.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Analytical
Yang Sun, Jiayang Wu, Yang Li, David J. Moss
Summary: RF photonic transversal signal processors combine reconfigurable electrical digital signal processing and high-bandwidth photonic processing for adaptive high-speed information processing. This paper compares the performance of processors implemented with discrete and integrated components, analyzes factors contributing to performance differences, and provides insights for future development.
Proceedings Paper
Engineering, Electrical & Electronic
Yang Qu, Yunyi Yang, Jiayang Wu, Yuning Zhang, Linnan Jia, Houssein El Dirani, Romain Crochemore, Corrado Sciancalepore, Pierre Demongodin, Christian Grillet, Christelle Monat, Baohua Jia, David J. Moss
Summary: The power-sensitive photo-thermal tuning (PTT) behavior of graphene oxide (GO) integrated on the top surface of silicon nitride (SiN) waveguides is experimentally investigated. The thresholds for reversible and permanent GO reduction are measured for SiN waveguide coating with monolayer GO. Three reduction stages are identified based on the reversibility of the reduction process. The study confirms that the PTT is primarily determined by the average input power, regardless of the type of laser used.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVII
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Yuning Zhang, Jiayang Wu, Yunyi Yang, Yang Qu, Linnan Jia, Houssein El Dirani, Romain Crochemore, Corrado Sciancalepore, Pierre Demongodin, Christian Grillet, Christelle Monat, Baohua Jia, David Moss
Summary: Graphene oxide (GO) films integrated on silicon nitride (Si3N4) waveguides through a solution-based method enhance the spectral broadening and self-phase modulation (SPM) effect. The GO-coated waveguides show significantly improved nonlinear performance compared to the uncoated waveguide, resulting in a broadening factor of up to 3.4 and an improvement in the waveguide nonlinear parameter by a factor of up to 18.4. The high Kerr nonlinearity of GO contributes to the enhancement of SPM in Si3N4 waveguides.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVII
(2023)
Article
Engineering, Electrical & Electronic
Yuning Zhang, Jiayang Wu, Yunyi Yang, Yang Qu, Houssein El Dirani, Romain Crochemore, Corrado Sciancalepore, Pierre Demongodin, Christian Grillet, Christelle Monat, Baohua Jia, David J. Moss
Summary: We demonstrate enhanced self-phase modulation (SPM) in silicon nitride (Si3N4) waveguides integrated with two-dimensional graphene oxide (GO) films. The use of a solution-based, transfer-free coating method allows precise control of the film thickness. The hybrid waveguides show significantly improved spectral broadening due to the high Kerr nonlinearity of GO, achieving a broadening factor of up to 3.4. The experimental results show an improvement in the waveguide nonlinear parameter by a factor of up to 18.4 and a Kerr coefficient (n(2)) of GO that is about 5 orders of magnitude higher than Si3N4. Theoretical analysis is provided for the influence of GO film length, coating position, and saturable absorption on the SPM performance.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Yang Li, Yang Sun, Jiayang Wu, Guanghui Ren, Bill Corcoran, Xingyuan Xu, Sai T. Chu, Brent. E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss
Summary: In this study, we experimentally demonstrate the capability of microcomb-based MWP signal processors to handle diverse input signal waveforms, and quantify the processing accuracy for different waveforms. Theoretical analysis reveals the factors contributing to the difference in processing accuracy among different input waveforms.
Proceedings Paper
Optics
Mengxi Tan, Xingyuan Xu, Yang Li, Yang Sun, Damien Hicks, Roberto Morandotti, Jiayang Wu, Arnan Mitchell, David J. Moss
Summary: This research demonstrates a universal optical vector convolutional accelerator and a deep optical CNN network for facial image recognition and handwritten digit recognition, with high accuracy. The results show that this approach is scalable and applicable to more complex networks.
LASER RESONATORS, MICRORESONATORS, AND BEAM CONTROL XXIV
(2022)
