Article
Optics
Xinyu LI, Wei Zhao, Zhihai Wang
Summary: We investigate the scattering of a single photon in a phonon-photon hybrid system in the waveguide quantum electrodynamics (QED) scheme. An artificial giant atom dressed by phonons in a surface acoustic wave resonator interacts with a coupled resonator waveguide (CRW) nonlocally via two connecting sites. The phonon, along with the interference effect by nonlocal coupling, acts as a controller for photon transport in the waveguide. The study explores the modulation of transmission valley or window width in the near resonant regime and the effective dispersive coupling in the presence of a large detuned giant atom and a surface acoustic resonator.
Review
Materials Science, Multidisciplinary
Nanxi Li, Guanyu Chen, Doris K. T. Ng, Leh Woon Lim, Jin Xue, Chong Pei Ho, Yuan Hsing Fu, Lennon Y. T. Lee
Summary: This review presents the development of integrated laser sources on silicon, focusing on the wavelength regimes for communication. Different types of lasers based on their gain media are discussed and compared.
ADVANCED OPTICAL MATERIALS
(2022)
Review
Nanoscience & Nanotechnology
Nanxi Li, Guanyu Chen, Leh Woon Lim, Chong Pei Ho, Jin Xue, Yuan Hsing Fu, Lennon Y. T. Lee
Summary: This review article examines the recent progress in fully integrated electrically driven optical frequency comb (OFC) generators, with a focus on two main types of research, and provides a summary and future outlook.
Article
Engineering, Electrical & Electronic
Rafael Kraemer, Fumi Nakamura, Menno van den Hout, Sjoerd van der Heide, Chigo Okonkwo, Hiroyuki Tsuda, Antonio Napoli, Nicola Calabretta
Summary: A multi-band photonic integrated wavelength selective switch operating in the O, S, C, and L-bands has been reported, utilizing a folded arrayed-waveguide grating as the filtering element. The operation of the switch was experimentally validated for different bands and modulation formats, demonstrating error-free operation with high data transmission rates in various bands.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Jianghong Wu, Hui Ma, Chuyu Zhong, Maoliang Wei, Chunlei Sun, Yuting Ye, Yan Xu, Bo Tang, Ye Luo, Boshu Sun, Jialing Jian, Hao Dai, Hongtao Lin, Lan Li
Summary: Integration of PdSe2 with silicon waveguide enables the development of photodetectors with high responsivity, low noise, high bandwidth, and high data rate. This integration provides new opportunities for the application of van der Waals materials on integrated photonic platforms and shows great potential for various applications in the infrared range.
Article
Nanoscience & Nanotechnology
Frank Brueckerhoff-Plueckelmann, Johannes Feldmann, Helge Gehring, Wen Zhou, C. David Wright, Harish Bhaskaran, Wolfram Pernice
Summary: The integration of artificial intelligence systems has led to a significant increase in data generation and processing, requiring compact and energy-efficient hardware. This paper presents an optimized layout for a photonic tensor core (PTC) that performs real-valued matrix vector multiplications at telecommunication wavelengths. The use of phase-change material as an optical attenuator allows for positive-valued multiplications, while a novel symmetric multiplication unit enables the multiplication of arbitrary real factors. The integration of wavelength multiplexers (MUX) and a photonic crossbar array on-chip paves the way for fully integrated systems.
Article
Physics, Applied
Natnicha Koompai, Thi Hao Nhi Nguyen, Victor Turpaud, Jacopo Frigerio, Virginia Falcone, Stefano Calcaterra, Luca Lucia, Adel Bousseksou, Raffaele Colombelli, Jean-Rene Coudevylle, David Bouville, Carlos Alonso-Ramos, Laurent Vivien, Giovanni Isella, Delphine Marris-Morini
Summary: We present broadband on-chip resonators based on SiGe graded-index waveguides operating in the long-wave infrared spectral range from 7.5 to 9.0 μm. High quality factors up to 10^5 have been measured, with an intrinsic quality factor of 1.13 x 10^5 extracted from the measurements. Thermal tuning of the phase in the micro-ring has been utilized to overcome the limitation of the experimental setup in terms of spectral resolution. These results pave the way for the development of integrated frequency combs operating in the long-wave infrared range.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yiming Ma, Yuhua Chang, Bowei Dong, Jingxuan Wei, Weixin Liu, Chengkuo Lee
Summary: Mid-infrared absorption spectroscopy is important for molecule identification and quantification, and integrated photonics technology allows on-chip spectroscopic sensing to minimize device size, cost, and power consumption. The integration of waveguides and photodetectors is essential for on-chip sensing systems, and extending the operating wavelengths to long-wave infrared range faces challenges from both waveguide platforms and photodetection technologies.
Article
Physics, Applied
Walter Shin, Yi Sun, Mohammad Soltani, Zetian Mi
Summary: This study demonstrates high Q aluminum nitride (AlN) on sapphire microring resonators at specific wavelengths, with a record of high intrinsic Q and propagation loss. The research also explores the thermal crosstalk between adjacent resonators caused by temperature changes.
APPLIED PHYSICS LETTERS
(2021)
Article
Quantum Science & Technology
Beatrice Da Lio, Carlos Faurby, Xiaoyan Zhou, Ming Lai Chan, Ravitej Uppu, Henri Thyrrestrup, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
Summary: This article presents a quantum frequency conversion scheme for converting single photons emitted by quantum dots to the telecommunication C band. The conversion achieves high end-to-end efficiency, purity, and indistinguishability.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Multidisciplinary Sciences
Zi Wang, Lorry Chang, Feifan Wang, Tiantian Li, Tingyi Gu
Summary: Miniaturized image classifiers have the potential to revolutionize applications in optical communication, autonomous vehicles, and healthcare. The use of subwavelength structures enables wavelength-selective image recognition on a silicon photonic platform, and the metasystems provide high-throughput computing capabilities and handle uncertainties in inputs.
NATURE COMMUNICATIONS
(2022)
Article
Optics
C. Porter, S. Zeng, X. Zhao, L. Zhu
Summary: Photonic integrated circuits (PICs) enable the rapid development of optical devices on a compact platform, enhancing their usability and availability in the commercial market. PICs can be created using various materials and hybrid integration can combine multiple material platforms, creating multi-functional PICs with unique properties. This paper discusses the methodology and applications of hybrid integration for chip-scale laser systems, including narrow linewidth lasers, widely tunable external cavity lasers, laser beam combining, integrated frequency combs, and integrated Pockels lasers.
Article
Optics
Hui Ma, Haotian Yang, Bo Tang, Maoliang Wei, Junying Li, Jianghong Wu, Peng Zhang, Chunlei Sun, Lan Li, Hongtao Lin
Summary: In this work, passive devices for the 2 μm waveband were fabricated in a silicon photonic multi-project wafer process, including a micro-ring resonator, waveguide crossing, multimode interferometer, and Mach-Zehnder interferometer. Experimental results showed that these devices performed well in the 2 μm waveband, providing important insights for the development of the 2 μm silicon photonic platform.
CHINESE OPTICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Thi Hao Nhi Nguyen, Natnicha Koompai, Victor Turpaud, Miguel Montesinos-Ballester, Jacopo Frigerio, Stefano Calcaterra, Andrea Ballabio, Xavier Le Roux, Jean-Rene Coudevylle, Cedric Villebasse, David Bouville, Carlos Alonso-Ramos, Laurent Vivien, Giovanni Isella, Delphine Marris-Morini
Summary: Mid-infrared (mid-IR) optics plays a significant role in various applications such as sensing, imaging, and telecommunication. However, the lack of a high-speed and room-temperature-integrated photodetector (PD) operating in a wide mid-IR spectrum hinders the development of compact and efficient spectroscopic systems. This study presents a waveguide-integrated PD based on a Schottky diode embedded in a graded silicon germanium waveguide. The PD achieves photodetection in a wide spectral range (5-8 µm) with responsivity of up to 0.1 mA W-1, and operates at frequencies beyond 20 MHz in pulsed regime. The device shows potential for on-chip signal monitoring and can contribute to the development of advanced compact and fully integrated spectroscopic systems in the long-wave infrared regions.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Anthony Rizzo, Stuart Daudlin, Asher Novick, Aneek James, Vignesh Gopal, Vaishnavi Murthy, Qixiang Cheng, Bok Young Kim, Xingchen Ji, Yoshitomo Okawachi, Matthew van Niekerk, Venkatesh Deenadayalan, Gerald Leake, Michael Fanto, Stefan Preble, Michal Lipson, Alexander Gaeta, Keren Bergman
Summary: Silicon photonics has great potential in improving optical interconnects in data centers and high performance computers, enabling higher transmission rates and lower energy consumption. This study reviews recent progress in silicon photonic interconnects, with a focus on chip-scale Kerr frequency comb sources, and provides a comprehensive overview of scalable silicon photonic systems. Experimental results demonstrate the feasibility of volume manufacturing for this technology.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Taewon Park, Hubert S. Stokowski, Vahid Ansari, Timothy P. McKenna, Alexander Y. Hwang, M. M. Fejer, Amir H. Safavi-Naeini
Summary: The strength of interactions between photons in a chi((2)) nonlinear optical waveguide increases at shorter wavelengths, enabling coherent spectral translation and light generation at a lower power. Thin-film lithium niobate (TFLN) could be a promising platform for these advances, with the demonstrated second harmonic generation of blue light achieving a conversion efficiency of 33,000%/W-cm(2).
Article
Multidisciplinary Sciences
Okan Atalar, Raphael Van Laer, Amir H. Safavi-Naeini, Amin Arbabian
Summary: In this study, a new type of single frequency intensity modulator, referred to as a longitudinal piezoelectric resonant photoelastic modulator, was reported. The modulator achieved record breaking modulation efficiency in the megahertz frequency regime. It was also demonstrated to be integrated with a standard image sensor for time-of-flight imaging.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Jason F. Herrmann, Vahid Ansari, Jiahui Wang, Jeremy D. Witmer, Shanhui Fan, Amir H. Safavi-Naeini
Summary: Researchers have demonstrated an integrated mirror-symmetric non-reciprocal device enabled by three coupled photonic resonators, achieving nearly 40 dB of isolation at telecommunications wavelengths. This device simplifies the fabrication and operation of non-reciprocal integrated devices and can be applied for full-duplex isolation within a single waveguide.
Article
Optics
Jatadhari Mishra, Marc Jankowski, Alexander Y. Hwang, Hubert S. Stokowski, Timothy P. McKenna, Carsten Langrock, Edwin Ng, David Heydari, Hideo Mabuchi, Amir H. Safavi-Naeini, M. M. Fejer
Summary: Thin-film lithium niobate (TFLN) is a compact, low-power platform for nonlinear-optical devices, and recent studies have shown that efficient and broadband difference frequency generation can be achieved in the mid-infrared range using tightly-confining waveguides.
Article
Multidisciplinary Sciences
Timothy P. McKenna, Hubert S. Stokowski, Vahid Ansari, Jatadhari Mishra, Marc Jankowski, Christopher J. Sarabalis, Jason F. Herrmann, Carsten Langrock, Martin M. Fejer, Amir H. Safavi-Naeini
Summary: In this study, the authors demonstrate a chip-scale device that can perform a comprehensive set of resonant second-order nonlinear processes, including optical parametric oscillation, with low threshold power and efficient frequency tuning ability. This research is of great importance for expanding the applications of photonics and enhancing the performance of quantum photonics platforms.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Alexander D. White, Geun Ho Ahn, Kasper Van Gasse, Ki Youl Yang, Lin Chang, John E. Bowers, Jelena Vuckovic
Summary: This article demonstrates an integrated approach for passively isolating a continuous-wave laser using the non-reciprocal Kerr nonlinearity in ring resonators. By using silicon nitride as the model platform, the authors achieve single ring isolation of 17-23 dB with 1.8-5.5 dB insertion loss, and cascaded ring isolation of 35 dB with 5 dB insertion loss. They also demonstrate hybrid integration and isolation with a semiconductor laser chip using these devices.
Article
Optics
Geun Ho Ahn, Alexander D. White, Hyungjin Kim, Naoki Higashitarumizu, Felix M. Mayor, Jason F. Herrmann, Wentao Jiang, Kevin K. S. Multani, Amir H. Safavi-Naeini, Ali Javey, Jelena Vuckovic
Summary: Many attractive photonics platforms lack integrated photodetectors due to material incompatibilities and lack of process scalability. This research shows that tellurium can be evaporated onto photonic chips using a thermal evaporation and deposition technique, resulting in air-stable, high-speed, ultrawide-band photodetectors. These photodetectors demonstrate detection from visible to short-wave infrared, a bandwidth of over 40 GHz, and platform-independent scalable integration with various photonic structures.
Article
Multidisciplinary Sciences
Hubert S. Stokowski, Timothy P. McKenna, Taewon Park, Alexander Y. Hwang, Devin J. Dean, Oguz Tolga Celik, Vahid Ansari, Martin M. Fejer, Amir H. Safavi-Naeini
Summary: The research focuses on the limitation of optical phase sensors due to the quantum noise of light. To overcome this, an engineered source of squeezed states is introduced to suppress the noise and improve the phase detection sensitivity. A photonic integrated circuit in thin-film lithium niobate is designed and used to generate squeezed states with the same frequency as the pump light, allowing for circuit control and sensing with electro-optics. The results show (2.7 +/- 0.2)% squeezing when using 26.2 milliwatts of optical power, and it is applied to increase the signal-to-noise ratio of phase measurement. Such low-power and integrated photonic systems have great potential in advancing quantum optical sensing.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Sultan Malik, Wentao Jiang, Felix M. Mayor, Takuma Makihara, Amir H. Safavi-Naeini
Summary: We have achieved strong coupling between gigahertz-frequency nanomechanical resonators and a frequency-tunable superconducting microwave resonator through a galvanically bonded flip-chip method. By tuning the microwave resonator using an external magnetic field, we have observed a series of hybridized microwave-mechanical modes and reported coupling strengths of approximately 15 MHz at cryogenic temperatures. The demonstrated multi-chip approach allows for flexible and rapid characterization and simplified fabrication, potentially enabling coupling between a variety of quantum systems.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Wentao Jiang, Felix M. Mayor, Sultan Malik, Raphael Van Laer, Timothy P. McKenna, Rishi N. Patel, Jeremy D. Witmer, Amir H. Safavi-Naeini
Summary: To distribute quantum information over long distances, researchers have developed a transducer that can generate correlated optical and microwave photons. Although improvements are needed, this study provides possibilities for long-distance quantum communication.
Article
Optics
Yan Gao, Fuchuan Lei, Marcello Girardi, Zhichao Ye, Raphael Van Laer, Victor Torres-Company, Jochen Schroder
Summary: Lithium niobate (LN) is a promising material for future complex photonic-electronic circuits. By fully etching LN waveguides, we have achieved a compact and ultralow-loss LN platform with great potential in future miniaturized multifunctional integration systems.
Article
Optics
Alexander y. Hwang, Hubert S. Stokowski, Taewon Park, Marc Jankowski, Timothy P. Mckenna, Carsten Langrock, Jatadhari Mishra, Vahid Ansari, Martin M. Fejer, Amir H. Safavi-Naeini
Summary: Researchers have developed a compact and efficient optical parametric oscillator with broad tunability in the mid-infrared range. By utilizing optimized photonics and cavity design, the device enables precise control and efficient generation of mid-infrared light, allowing for spectroscopy of specific molecules such as methane and ammonia.
Article
Optics
Okan Atalar, Steven Yee, Amir H. Safavi-Naeini, Amin Arbabian
Summary: The paper presents lithium niobate acousto-optic modulators with record-high modulation efficiency. The modulators can modulate the intensity of an optical beam and have significant applications.