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.
Article
Optics
Tao Ma, Yongsheng Tian, Linxing Su, Huan Wang, Heng Liu, Fang Wang
Summary: The performance of EO modulators based on polymer-embedded silicon racetrack resonators is investigated, and the modulation performances of different materials are compared. The results show that modulators embedded with lithium niobate achieve high modulation depth and low wavelength tuning, while modulators embedded with hybrid materials have high wavelength tuning but low modulation depth.
Article
Optics
Zheng Gong, Mohan Shen, Juanjuan Lu, Joshua B. Surya, Hong X. Tang
Summary: Hybrid Kerr and electro-optic microcombs based on a lithium niobate thin film are demonstrated, enabling direct electronic detection and feedback control of terahertz soliton repetition rates by interleaving high-repetition-rate Kerr soliton comb with low-repetition-rate electro-optic comb on the same waveguide.
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
Optics
Yaojing Zhang, Keyi Zhong, Hon Ki Tsang
Summary: For the first time, a new general equation that predicts the onset of Raman lasing in a cavity, considering linear loss, nonlinear losses, and cavity design, has been derived and experimentally validated. The study shows that cavities with small effective areas, short lengths, and high quality factors (Qs) at both pump and Stokes wavelengths can lase at relatively low pump power. The Raman lasing at O/S-band in racetrack resonators without reverse bias and the broad operation wavelength is promising for single-chip silicon devices operating at all communication bands.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Ruitao Yang, Jinxuan Wu, Hongxing Yang, Haijin Fu, Liang Yu, Xu Xing, Yisi Dong, Pengcheng Hu, Jiubin Tan
Summary: This paper proposes a spectrum characterization method for CEEOCGs based on the accumulation of round-trip propagation count. It eliminates approximations and is applicable to arbitrary conditions. The calculation efficiency is improved by noniterative matrix operations. Additionally, the effects of all CEEOCG parameters are comprehensively characterized for the first time, providing accurate analysis and prediction for further optimization and applications.
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)
Article
Engineering, Electrical & Electronic
Yisbel E. Marin, Arijit Bera, Matteo Cherchi, Timo Aalto
Summary: We used a hydrogen annealing based post-processing technique to improve the sidewall roughness of 3 µm thick SOI waveguides and achieved ultra-high-Q factors on racetrack resonators by reducing propagation loss. Racetracks were designed using a combination of rib waveguides and strip-waveguide-based Euler bends. We measured intrinsic quality factors of 14 x 10^6 and 10.7 x 10^6 for racetracks with footprints of approximately 5.5 mm^2 and 1.48 mm^2, respectively. The estimated propagation loss for the rib waveguides was reduced to 2.7 dB/m, representing a 3 times reduction compared to previously treated SOI rib waveguides. The post-processing technique significantly reduced sidewall roughness without altering the geometry of the waveguides, making it an attractive solution for applications requiring ultra-low losses.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yan Xu, Tingyu Liu, Songyue Liu, Xiaoqiang Sun, Daming Zhang
Summary: In this work, high-Q silicon dual-concentric MRR and racetrack resonators were investigated using the coupled mode theory. CMOS fabrication was used, and the Q-factors of the two resonators were measured. The experimental results showed that the asymmetry of resonance splitting can be tuned by adjusting the distance between the inner-ring and outer-ring, as well as the waveguide width.
IEEE PHOTONICS JOURNAL
(2022)
Article
Optics
D. A. Long, B. J. Reschovsky, T. W. LeBrun, J. J. Gorman, J. T. Hodges, D. F. Plusquellic, J. R. Stroud
Summary: An interleaved, chirped electro-optic dual comb system is demonstrated for rapid, high dynamic range measurements of cavity optomechanical sensors. This method allows for fast measurement times and larger measurement ranges. It has a wide range of applications.
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
Engineering, Electrical & Electronic
Mandan Luo, Qing Yang, Funing Dong, Ning Chen, Wei Liao
Summary: In this paper, a novel integrated waveguide wide-band electric field sensing solution is proposed. The sensor efficiently measures electric fields over a wide frequency range by utilizing high efficiency electro-optic energy coupling and detecting output light intensity. It has advantages such as small size, simple structure, and low cost.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yuewen Gao, Yu Gu, Toshiaki Iitaka, Zhi Li
Summary: It is discovered that semiconductors synthesized under high pressure, such as MgSiN2, SrSiN2, and BaSiN2, can exhibit a large bandgap and high linear electro-optic coefficient due to the enhanced valence bond strength. The research demonstrates the feasibility of enhancing the linear electro-optic coefficient through high-pressure treatment.
Article
Optics
Ziliang Ruan, Kaixuan Chen, Zong Wang, Xuancong Fan, Ranfeng Gan, Lu Qi, Yiwei Xie, Changjian Guo, Zhonghua Yang, Naidi Cui, Liu Liu
Summary: This study introduces a SiN and LN heterogeneous integration platform that supports high-performance EO modulators on SiN waveguide circuits. An efficient evanescent coupling structure is realized for low-loss light transitions between the SiN waveguide and the LN ridge waveguide. Based on this platform, an unprecedented EO Mach-Zender interference modulator on SiN is built with remarkable loss, efficiency, and bandwidth performances.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Mengke Wang, Yixin Chen, Shengpeng Zhang, Lianghai Dong, Hao Yao, Huajun Xu, Kaixin Chen, Jieyun Wu
Summary: Emerging technologies, such as artificial intelligence (AI) and big data, are driving the exponential growth of data traffic in fiber-optic communication networks. Electro-optic (EO) modulators, utilizing the electro-optic effect, have emerged as promising candidates for high-speed and high-efficiency optical transceivers. Pockels electro-optic materials, including organic poled polymers and inorganic thin-film lithium niobate, have unique material properties that make them suitable for achieving high-speed and high-efficiency EO modulation.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Optics
Massimo Borghi, Lorenzo Pavesi
Summary: The researchers added additional spectral tunability to the source by tapering the waveguide width and controlling the delay between pump pulses, while inheriting all the distinctive metrics of the IFWM scheme. This feature allows for the recovery of spectral indistinguishability in the presence of fabrication errors.
Article
Engineering, Electrical & Electronic
Davide Bazzanella, Mattia Mancinelli, Massimo Borghi, Paolo Bettotti, Lorenzo Pavesi
Summary: PRECISE is a Matlab-based library for modeling large and complex photonic integrated circuits. It uses steady-state approximation to handle steady-state effects in circuits, can handle large and complex circuits on desktop PCs, and has a highly modular and easily extensible design.
IEEE PHOTONICS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Giole Piccoli, Matteo Sanna, Massimo Borghi, Lorenzo Pavesi, Mher Ghulinyan
Summary: Researchers have proposed a low-loss material platform based on silicon oxynitride (SiON), which exhibits significant linear and nonlinear optical characteristics in the infrared and near-infrared wavelength range. The platform demonstrates low propagation loss at visible wavelengths, enabling the realization of long and complex photon manipulation circuits and high-quality factor resonators. Additionally, the proposed SiON exhibits a high nonlinear refractive index, enhancing the efficiency of on-chip photon generation schemes.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Multidisciplinary Sciences
Marco Clementi, Federico Andrea Sabattoli, Massimo Borghi, Linda Gianini, Noemi Tagliavacche, Houssein El Dirani, Laurene Youssef, Nicola Bergamasco, Camille Petit-Etienne, Erwine Pargon, J. E. Sipe, Marco Liscidini, Corrado Sciancalepore, Matteo Galli, Daniele Bajoni
Summary: Frequency-bin qubits are generated on-chip by controlling the interference of biphoton amplitudes in multiple ring resonators, enabling long-range transmission over optical links. The chip can be programmed to generate computational basis states and Bell states with high brightness, fidelity, and purity.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
M. Baldo, O. Melnic, M. Scudieri, G. Nicotra, M. Borghi, E. Petroni, A. Motta, P. Zuliani, L. Laurin, A. Redaelli, D. Ielmini
Summary: Germanium-rich alloys of Ge2Sb2Te5 have been developed to improve the reliability and performance of embedded phase change memory (PCM). Fast program operation, integration in the back end of the line (BEOL), and stability under high-temperature profiles make PCM with Ge-rich GST one of the prominent technologies for the embedded memory market.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Physics, Applied
Massimo Borghi, Noemi Tagliavacche, Federico Andrea Sabattoli, Houssein El Dirani, Laurene Youssef, Camille Petit-Etienne, Erwine Pargon, J. E. Sipe, Marco Liscidini, Corrado Sciancalepore, Matteo Galli, Daniele Bajoni
Summary: Quantum optical microcombs in integrated ring resonators can generate entangled photon pairs over many spectral modes and allow the preparation of high-dimensional qudit states. We present a programmable silicon photonics device that can reconfigure the bin spacing, qudit dimension, and bipartite quantum state on chip. By individually addressing each spectral mode, we achieve states that cannot be generated on chip using a single resonator.
PHYSICAL REVIEW APPLIED
(2023)
Article
Optics
Emiliano Staffoli, Mattia Mancinelli, Paolo Bettotti, Lorenzo Pavesi
Summary: A small 4-channel time-delayed complex perceptron is used to compensate for chromatic dispersion in optical fiber links. The PNN device is experimentally tested with non-return-to-zero optical signals at 10 Gbps after propagation through up to 125 km optical fiber link. The testing shows that the excess losses introduced by the PNN device are compensated by the gain in the transmitted signal equalization for a link longer than 100 km, and the measured data are reproduced by a model that accounts for the optical link and the PNN device, suggesting improved performance and ease of use compared to the benchmark.
PHOTONICS RESEARCH
(2023)
Article
Optics
Riccardo Franchi, Stefano Biasi, Diego Piciocchi, Lorenzo Pavesi
Summary: This study introduces a novel non-Hermitian structure called the infinity-loop microresonator, which is based on a microresonator shaped as the infinity symbol twice coupled to a bus waveguide. It can achieve either high- or low-contrast unidirectional reflection and has negligible or identical reflection for counterpropagating light. The phase of the light propagating in the bus waveguide can be controlled to enable easy walking through the Riemann sheet, making it a tunable component for building more complex topological structures. Furthermore, the infinity-loop microresonator allows sensors that exhibit the features of both an exceptional point device and a diabolic point device simultaneously.
Proceedings Paper
Engineering, Electrical & Electronic
Gioele Piccoli, Mher Ghulinyan
Summary: The interest in integrated photonic processors is growing rapidly, with the aim of realizing devices that can provide single photon qubits for efficient and scalable quantum computation. While on-chip single photon manipulation is well developed, the integration of photon generation and detection stages on the same chip is still a challenge. In this study, a potentially scalable, integrated source of near-infrared photon pairs based on ring resonators was presented, using dispersion-engineered silicon oxynitride waveguides as core material.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVII
(2023)
Proceedings Paper
Biochemical Research Methods
Ilya Auslender, Yasaman Heydari, Clara Zaccaria, Asiye Malkoc, Beatrice Vignoli, Lorenzo Pavesi
Summary: In this study, we present our optogenetic tool using a digital light processor (DLP) for light stimulation of neuronal culture, combined with a microelectrode array (MEA) system for sampling. The aim of this work is to develop an integrated experimental platform for studying the structure and function of neuronal networks. The proposed setup serves as an optogenetic tool for in-vitro experiments, allowing specific neuronal circuits to be addressed based on feedback from electrophysiological signals. The manuscript presents recent results from experiments involving optical stimulation and electrophysiological recording, as well as an AI-based model for reproducing the functionality and macro-structure of the cultured neurons.
OPTOGENETICS AND OPTICAL MANIPULATION 2023
(2023)
Proceedings Paper
Engineering, Multidisciplinary
L. Cattaneo, M. Baldo, N. Lepri, F. Sancandi, M. Borghi, E. Petroni, A. Serafini, R. Annunziata, A. Redaelli, D. Ielmini
Summary: In the era of the internet of things (IoT), hardware physical unclonable functions (PUFs) are crucial for system on chip (SoC) authentication. Identifying physical entropy sources is essential for developing low-cost, low-power, reliable PUFs. This work introduces MVPUF, a new PUF circuit based on embedded PCM, which utilizes the random virgin state of the PCM and a novel selection technique for challenge-response pairs (CRPs), demonstrating improved reliability compared to PUFs based on resistive switching memory (RRAM).
2023 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM, IRPS
(2023)
Proceedings Paper
Engineering, Multidisciplinary
L. Laurin, M. Baldo, E. Petroni, G. Samanni, L. Turconi, A. Motta, M. Borghi, A. Serafini, D. Codegoni, M. Scuderi, S. Ran, A. Claverie, D. Ielmini, R. Annunziata, A. Redaelli
Summary: This work presents a comprehensive study on the retention of set and reset states in Ge-rich Phase Change Memory by coupling electrical and physical characterizations. The presence of amorphous residuals inside the active region of PCM devices is demonstrated for the first time through High Resolution Scanning Transmission Electron Microscopy. The role of such formations was studied using electrical characterization and supported by modeling analysis. The retention physics has been analytically modeled with the same framework for both low and high state resistive behavior.
2023 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM, IRPS
(2023)
Proceedings Paper
Optics
Martino Bernard, Mher Ghulinyan, Fabio Acerbi
Summary: We have achieved the realization of an Electronic-Photonic Integrated Circuit by integrating a photonic circuit on top of silicon detectors using a monolithic process. The 850nm optical signal is coupled into the detectors through two coupling methods developed with the use of wedge technology. This technology can also be applied to the development of avalanche photodiodes operating in Geiger mode for single photon resolution.
2022 ITALIAN CONFERENCE ON OPTICS AND PHOTONICS (ICOP)
(2022)
Proceedings Paper
Quantum Science & Technology
Nicola Massari, Yu Zou, Manuel Moreno Garcia, Luca Parmesan, Alessandro Tontini, Sonia Mazzucchi, Nicolo Leone, Stefano Azzini, Lorenzo Pavesi, Ingo Herrmann, Thomas Strohm
Summary: This paper demonstrates possible ways to design monolithic Quantum Random Number Generators in standard CMOS technology using silicon-based photon sources. The approach allows for integration, potential embedding in secure microprocessors, compact design, and a minimum event rate of about 1kHz.
QUANTUM TECHNOLOGIES 2022
(2022)
Proceedings Paper
Optics
Giovanni Donati, Apostolos Argyris, Claudio R. Mirasso, Mattia Mancinelli, Lorenzo Pavesi
Summary: Time-delay Reservoir Computing, implemented using a single silicon microring resonator subject to optical feedback, shows hardware simplicity and is capable of solving memory demanding tasks. Our research reveals the correlation between the nonlinearity of the microring resonator and the robustness to noise.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVI
(2022)
