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
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
Jiawei Wang, Kaikai Liu, Mark W. Harrington, Ryan Q. Rudy, Daniel J. Blumenthal
Summary: Modulation-based control is a common function in many applications. This study presents the integration of a piezo-electric actuated micro-ring modulation in a silicon nitride platform, which offers low loss, wide bandwidth, and low power consumption. The modulator demonstrates control applications in laser stabilization and laser carrier tracking filter.
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
Xialin Liu, Boris Braverman, Robert W. Boyd
Summary: We demonstrate a high-speed spatial light modulator (SLM) that can generate arbitrary spatial profiles in a laser pulse by mapping the temporal radio-frequency (RF) waveform to the optical field using an acousto-optic modulator (AOM). The fidelity of the SLM performance can be improved through numerical optimization of the RF waveform to overcome the nonlinearity of the AOM. The resulting acousto-optic SLM has a 50 μm pixel pitch, over 1 MHz update rate, and high damage threshold.
Article
Engineering, Electrical & Electronic
Amir Youssefi, Itay Shomroni, Yash J. Joshi, Nathan R. Bernier, Anton Lukashchuk, Philipp Uhrich, Liu Qiu, Tobias J. Kippenberg
Summary: This experiment demonstrates the cryogenic electro-optical readout of a superconducting electromechanical circuit using a commercial titanium-doped lithium niobate modulator, achieving coherent spectroscopy and incoherent thermometry. Further optimization of the modulator design could reduce the added noise of the setup to levels similar to current semiconductor microwave amplifiers.
NATURE ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Yuya Yamaguchi, Pham Tien Dat, Shingo Takano, Masayuki Motoya, Shotaro Hirata, Yu Kataoka, Junichiro Ichikawa, Satoshi Oikawa, Ryo Shimizu, Naokatsu Yamamoto, Kouichi Akahane, Atsushi Kanno, Tetsuya Kawanishi
Summary: An electro-optic frequency-domain equalizer is proposed and investigated to increase the 3-dB bandwidth of optical modulators. The equalizer can be integrated with conventional modulators using different waveguide structures. Experimental results show that integrating the equalizer can double the modulator's 3-dB bandwidth.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
News Item
Optics
Anton Nalitov
Summary: A breakthrough has been achieved in topological photonics by using strong light-matter coupling in an optical cavity to reach record energy splitting values for photonic spins in magnetic fields.
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
Optics
Ken-ichi Aoshima, Nobuhiko Funabashi, Ryo Higashida, Mayumi Kawana, Shintaro Aso, Junichi Shibasaki, Yuta Yamaguchi, Kenji Machida
Summary: We have developed a magneto-optical spatial light modulator (MO-SLM) with a high pixel layout. The MO-SLM device pixel utilizes a magnetic nanowire made of Gd-Fe magneto-optical material to reverse magnetization. We successfully demonstrated the reconstruction of holographic images, showing large viewing zone angles and visualizing different depths of objects.
Article
Nanoscience & Nanotechnology
Figen Ece Demirer, Yngwie Baron, Sander Reniers, Dzmitry Pustakhod, Reinoud Lavrijsen, Jos van der Tol, Bert Koopmans
Summary: This study presents the design, fabrication, and experimental demonstration of a magneto-photonic device that combines integrated photonic components with a non-volatile, built-in memory element to achieve non-volatile photonic memory functionality. The device overcomes the energy and speed bottleneck of signal conversion between electronic and optical domains, providing high-speed and energy-efficient information retrieval.
Article
Optics
Forrest Valdez, Viphretuo Mere, Shayan Mookherjea
Summary: This study demonstrates integrated hybrid thin-film lithium niobate (TFLN) electro-optic Mach-Zehnder modulators (MZM) that utilize TFLN bonded to planarized silicon nitride waveguides. The design eliminates the need for TFLN etching or patterning. The MZM achieves a half-wave voltage length product (V pi L) of 0.8 V.cm at 784 nm. MZM devices with modulation lengths of 0.4 cm and 0.8 cm display a broadband electro-optic response, with a 3 dB bandwidth exceeding 100 GHz and a high extinction ratio exceeding 30 dB, showcasing record performance.
Article
Optics
Shang-Yu Ren, Wei Yan, Lan-Tian Feng, Yang Chen, Yun-Kun Wu, Xiao-Zhuo Qi, Xiao-Jing Liu, Yu-Jie Cheng, Bo-Yu Xu, Long-Jiang Deng, Guang-Can Guo, Lei Bi, Xi-Feng Ren
Summary: The feasibility of nonreciprocal photonic devices in the quantum world has been investigated. A single-photon non-reciprocal dynamical transmission experiment using an on-chip silicon nitride-based magneto-optical isolator has been performed, achieving a measured isolation ratio of 12.33 dB. The functionality of the on-chip isolator has been proven, and the quantum coherence of the passing single photons has been verified. This work will contribute to the development of on-chip nonreciprocal photonic devices within integrated quantum circuits and introduce novel phenomena in quantum information processes.
LASER & PHOTONICS REVIEWS
(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
Engineering, Electrical & Electronic
Mario Alberto Serrano-Nunez, Yuya Shoji, Tetsuya Mizumoto
Summary: This paper experimentally demonstrates a silicon optical isolator using a monolithically integrated cobalt ferrite film as a magneto-optical material, achieving an isolation ratio of 9.6 dB near a wavelength of 1550 nm. The device has a compact size compared to current yttrium iron garnet-based isolators due to the large Faraday rotation coefficient of cobalt ferrite. Furthermore, self-biased isolation is achieved through the strong remanence of cobalt ferrite films, eliminating the need for an external magnet. Cobalt ferrite represents a potential alternative to yttrium iron garnets for realizing practical on-chip isolation devices in silicon photonic integrated circuits due to its small footprint.
IEICE ELECTRONICS EXPRESS
(2022)
Article
Optics
Shuyuan Liu, Yuya Shoji, Tetsuya Mizumoto
Summary: This study demonstrates a transverse electric mode magneto-optical isolator based on an asymmetric microring resonator without additional polarization rotators in series. Cerium-substituted yttrium iron garnet is integrated with silicon-on-insulator substrates by wafer bonding to break the Lorentz reciprocity on-chip after applying a unidirectional magnetic field.
Article
Optics
Toshiya Murai, Yuya Shoji, Tetsuya Mizumoto
Summary: This study presents a scheme for light-induced thermomagnetic recording on a Si photonic platform, where lightwave coupled to a ferromagnetic thin-film magnet causes heating and a decrease in coercive force, leading to magnetization reversal. This scheme enables the realization of on-chip magneto-optical memories on the Si photonic platform without the need for complex drive systems.
Article
Materials Science, Multidisciplinary
Eisuke Matsushita, Yota Takamura, Shigeki Nakagawa
Summary: The bulk magnetic anisotropy of the CFS layers contributes to PMA, and tensile strain for out-of-plane is induced when the thickness is above 1.8 nm; Pd may exist at the CFS/MgO interface, causing bulk anisotropy of the samples with CFS thickness less than 2 nm.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
T. Brown, E. Doucet, D. Riste, G. Ribeill, K. Cicak, J. Aumentado, R. Simmonds, L. Govia, A. Kamal, L. Ranzani
Summary: In this study, the authors achieved fast and high-fidelity Bell state stabilization in a qutrit-qubit system using a protocol based on parametric system-bath coupling. By creating a purely dissipative channel, they achieved trade-off-free Bell state stabilization in terms of steady-state fidelity and stabilization rate.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Z. Xiao, E. Doucet, T. Noh, L. Ranzani, R. W. Simmonds, L. C. G. Govia, A. Kamal
Summary: We present a systematic method to implement perturbative Hamiltonian diagonalization using the time-dependent Schrieffer-Wolff transformation. Applying this method to strong parametric interactions, we show that the full Rabi model physics is crucial for describing the dressed spectrum even in the dispersive regime. Our results reveal several qualitatively different outcomes, including the realization of large energy level shifts that can be tuned in magnitude and sign with the frequency and amplitude of the pump mediating the parametric interaction. The framework developed here expands the capabilities for controlling and reading out strongly interacting quantum systems by highlighting the rich physics accessible with time-dependent interactions.
PHYSICAL REVIEW APPLIED
(2022)
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
Engineering, Electrical & Electronic
Rui Ma, Sander F. G. Reniers, Yuya Shoji, Tetsuya Mizumoto, Yuqing Jiao, Jos J. G. M. van der Tol, Kevin A. Williams
Summary: This paper demonstrates an on-chip optical circulator on the InP-membrane-on-Si (IMOS) platform. The circulator is composed of two multi-mode interferometers (MMIs), four polarization converters (PCs), and a Cerium-doped Yttrium Iron Garnet (Ce:YIG) die. The Ce:YIG die is bonded on the InP membrane via a thin bonding layer. Nonreciprocal phase shift (NRPS) is employed using a transverse magnetic field. The device functions as a 4-port optical circulator and achieves a maximum optical isolation of 27.0 dB and a minimum optical isolation of 18.6 dB for the TE mode. The proposed methods aim to improve the optical isolation bandwidth.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2023)
Article
Physics, Applied
Daniel L. Campbell, Archana Kamal, Leonardo Ranzani, Michael Senatore, Matthew D. LaHaye
Summary: The development of modular and versatile quantum interconnect hardware is crucial for scaling quantum information platforms. The proposed double-transmon coupler (DTC) architecture provides tunable coupling via flux-controlled interference, allowing for fast and robust linear coupling in various applications such as two-qubit gate operations and quantum bus interfacing. The internally defined zero-coupling state of the DTC makes it particularly attractive as a modular and versatile design element.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Ryota Kitagawa, Shunsuke Nagata, Keigo Arai, Kosuke Mizuno, Takeyuki Tsuji, Ikuya Fujisaki, Soki Urashita, Teruo Kohashi, Yota Takamura, Takayuki Iwasaki, Shigeki Nakagawa, Mutsuko Hatano
Summary: This study presents the imaging of magnetic response to external pressure using a hybrid structure of magnetostrictive layers and nitrogen-vacancy centers in diamonds. The magnetostrictive layer converts pressure to a magnetic field, which is detected by nitrogen-vacancy centers. By using hybrid materials and widefield imaging, the pressure coefficient and its correlation with the multidomain structure of the magnetostrictive layer are observed. The highest pressure coefficient achieved is 8.2 kHz kPa-1, 550 times greater than that of a single nitrogen-vacancy center structure. The approach of using magnetostrictive disk arrays consisting of a single domain is proposed as a means to improve sensitivity, controllability, and accuracy in pressure imaging.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Multidisciplinary
T. Noh, Z. Xiao, X. Y. Jin, K. Cicak, E. Doucet, J. Aumentado, L. C. G. Govia, L. Ranzani, A. Kamal, R. W. Simmonds
Summary: Efficient control and measurement of qubits can be achieved by using parametric driving to introduce and remove interactions. This study demonstrates a design that couples two transmon qubits to a cavity using a shared SQUID, enabling independent tuning of each qubit's interaction with the cavity. The results show promising potential for various future applications in cavity QED.
Proceedings Paper
Engineering, Electrical & Electronic
Rosalyn Koscica, Paolo Pintus, Minh A. Tran, M. J. Kennedy, Chao Xiang, John Bowers
Summary: This article presents a heterogeneous III-V on Si electro-optic Mach-Zehnder modulator with a p-i-n junction, achieving a V-pi . L of 3.4 V.mm, an eye diagram opening up to 12 Gb/s, and a small average energy per bit of 63 fJ/bit at 12 Gb/s.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Toshiya Murai, Yuya Shoji, Tetsuya Mizumoto
Summary: We demonstrate the light-induced thermomagnetic recording of a ferromagnetic thin-film CoFeB placed on a silicon waveguide for the first time, where magnetization reversal is observed when light propagates in the waveguide and heats up the thin-film magnet.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
