Article
Materials Science, Multidisciplinary
Renato Juliano Martins, Marlene Petit, Yoann Brule, Franck Billard, Edouard Hertz, Benoit Cluzel, Olivier Demichel
Summary: Managing thermal effects at the nanoscale is crucial for the efficiency and reliability of semiconductor nanostructures. This study demonstrates the coherent generation, control, and detection of acoustic phonons in silicon metasurfaces using femtosecond laser pulses and inelastic scattering spectroscopy.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Michael S. Shur
Summary: The terahertz (THz) technology has wide applications, with Beyond 5G Wi-Fi and Internet of Things (IoT) as its expected killer applications. Plasmonic TeraFETs with feature sizes down to 3 nm could enable a dramatic expansion of these applications.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Mingming Zhang, Weilun Wei, Weihao Li, Huan He, Yizhao Chen, Hao Wu, Can Zhao, Zhiyong Zhao, Ming Tang
Summary: This study demonstrates the high compatibility between the selfhomodyne coherent detection (SHCD) transmission system and the Brillouin optical time-domain analyzer (BOTDA), achieving an endogenously integrated BOTDA subsystem. The remote delivery of the local oscillator (LO) light ensures frequency match and an injection-locked distributed feedback (DFB) laser is used to amplify the LO and eliminate the effects of Brillouin gain. The experiment shows successful integration of a 16-km distributed temperature sensing based on BOTDA into a 50-Gbaud DP-16QAM SHCD transmission system, with high spatial resolution and temperature accuracy.
Article
Physics, Applied
Yuhui Zhang, Michael S. Shur
Summary: The study investigated the terahertz detection performance and operating regimes of graphene plasmonic FETs using a hydrodynamic model. Continuous wave detection simulations showed similar response sensitivity to other materials, while pulse detection results indicated a very short response time favored rapid/high-sensitively detection. Analysis on the mobility dependence of response time revealed similar detection regimes to traditional semiconductor materials.
JOURNAL OF APPLIED PHYSICS
(2021)
Review
Engineering, Electrical & Electronic
Xiang Yi, Cheng Wang, Zhi Hu, Jack W. Holloway, Muhammad Ibrahim Wasiq Khan, Mohamed I. Ibrahim, Mina Kim, Georgios C. Dogiamis, Bradford Perkins, Mehmet Kaynak, Rabia Tugce Yazicigil, Anantha P. Chandrakasan, Ruonan Han
Summary: Silicon-based terahertz integrated circuits have rapidly progressed in the past decade, enabling the construction of high-complexity THz integrated systems. While these implementations are cost-effective and highly integrated, their unique characteristics also require research into unconventional system architectures and novel THz applications.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Optics
Zhibin Jiang, Yilun Wang, Liao Chen, Yu Yu, Shixing Yuan, Wentao Deng, Ruolan Wang, Ziwei Wang, Qizhi Yan, Xiaojun Wu, Xinliang Zhang
Summary: The technique of photo-mixing, along with the development of graphene photodetectors, has led to the emergence of integrated THz emitters. The SPG sub-THz emitter is capable of emitting sub-THz waves in the frequency range of 50 to 300 GHz, offering significant potential for various THz applications.
Article
Engineering, Electrical & Electronic
M. Kohli, D. Chelladurai, A. Messner, Y. Horst, D. Moor, J. Winiger, T. Blatter, T. Buriakova, C. Convertino, F. Eltes, M. Zervas, Y. Fedoryshyn, U. Koch, J. Leuthold
Summary: This paper presents a high-speed plasmonic barium titanate (BTO, BaTiO3) Mach-Zehnder modulator. The modulator combines nanoscale plasmonics with BTO as solid-state active material and silicon nitride (SiN) for waveguiding, and integrates them in a monolithic platform. Experimental results show that the modulator has a flat electro-optic frequency response up to 70 GHz and a low V pi L product of 144 V mu m. The modulator can achieve data rates of 216 Gbit/s with a 216GBd 2PAM signal and 256 Gbit/s with a 128GBd 4PAM signal. The integration of the silicon nitride platform with high-speed plasmonics using BTO is a promising solution for future Tb/s optical interconnect platforms.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Daniel Headland, Withawat Withayachumnankul, Masayuki Fujita, Tadao Nagatsuma
Summary: The research demonstrates AWG-like functionality without the need for a grating or waveguide array, achieving a compact, high-bandwidth, and efficient photon multiplexer through optical tunneling and in-slab beamforming techniques.
Article
Physics, Multidisciplinary
Yong Tan, Hang Zhao, Wei-Min Wang, Rui Zhang, Yue-Jin Zhao, Cun-Lin Zhang, Xi-Cheng Zhang, Liang-Liang Zhang
Summary: In this study, a THz coherent detection scheme based on liquid water is proposed. The scheme offers high sensitivity and a wide frequency range for the time-resolved waveform of the THz field. It is sensitive to THz polarization and phase difference, and also demonstrates robustness and flexibility.
PHYSICAL REVIEW LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Shivangi Chugh, Rakesh Ashok, Punit Jain, Sana Naaz, Aboobackkar Sidhique, Shalabh Gupta
Summary: To reduce power consumption, form factor, cost, and latency, researchers propose an integrated photonic and electronic circuit solution for short-reach coherent links. The solution involves a silicon photonic integrated coherent receiver and an electronic carrier phase recovery chip, which compensates for the time varying phase offset between the modulated signal and unmodulated carrier.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Dietmar Kissinger, Mehmet Kaynak, Andreas Mai
Summary: This invited paper reviews the progress of silicon-based integrated analyzers for biomedical applications over the last two decades. It discusses high-frequency architectures and specific implementations, as well as their use in narrowband and broadband integrated readout circuits. Various circuits are recapitulated, ranging from low-power sensing oscillators to highly integrated broadband vector network analyzers. The paper closes with an outlook on emerging research fields for future advancement of biomedical sensors.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Review
Nanoscience & Nanotechnology
Ratmalgre A. S. D. Koala, Masayuki Fujita, Tadao Nagatsuma
Summary: Recent advances in silicon microphotonics have enabled the development of novel THz devices based on dielectric waveguides. The use of all-Si waveguides has allowed THz systems to transition from discrete components to integrated circuits, thanks to their low-loss, low dispersion, and single-mode waveguiding capabilities. This review article reevaluates the evolution stages of THz integrated circuits and systems using all-Si waveguides.
Article
Optics
Panisa Dechwechprasit, Harrison Lees, Daniel Headland, Christophe Fumeaux, Withawat Withayachumnankul
Summary: This article introduces a reconfigurable switch device used in terahertz circuit and system designs to control and manipulate the flow of terahertz signals. The experimental results show that the switch has low insertion loss and high extinction ratio, and has the potential to achieve reconfigurable beam control in future applications.
Article
Optics
Mengyue Xu, Yuntao Zhu, Jin Tang, Jingyi Wang, Lin Liu, Huixiao Ma, Siyuan Yu, Bofang Zheng, Xinlun Cai
Summary: In the past decade, coherent technology has been used in long-haul transmission systems to meet the growing demand for capacity at lower costs per bit. A high-performance coherent modulator with high data rates, wide bandwidth, small footprint, and low power operation is proposed. The device allows for attojoule-per-bit level electrical energy consumption over transmission distances above 1000 km, opening opportunities for lower-cost and capacity-intensive coherent systems that consume ultra-low power, support high data rate, and work in small spaces.
Article
Quantum Science & Technology
Mark Dong, Matthew Zimmermann, David Heim, Hyeongrak Choi, Genevieve Clark, Andrew J. Leenheer, Kevin J. Palm, Alex Witte, Daniel Dominguez, Gerald Gilbert, Matt Eichenfield, Dirk Englund
Summary: We introduce a programmable photonic integrated circuit (PIC) capable of high-speed and high-fidelity reconfigurable optical connections for optically-heralded entanglement among target qubits. The PIC's N x N Mach-Zehnder mesh (MZM) can generate optical connectivity on up to 8 inputs and demonstrated optical connections between 16 independent pairwise mode couplings with high fidelity. This programmable PIC platform enables the fast and scalable optical switching technology necessary for network-based quantum information processors.
NPJ QUANTUM INFORMATION
(2023)
Article
Multidisciplinary Sciences
Philipp Trocha, Juned Nassir Kemal, Quentin Gaimard, Guy Aubin, Francois Lelarge, Abderrahim Ramdane, Wolfgang Freude, Sebastian Randel, Christian Koos
Summary: Laser-based light detection and ranging (LiDAR) is crucial in many scientific and industrial applications. This paper presents quantum-dash mode-locked laser diodes as an attractive solution for high-performance chip-scale ranging systems.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Dengyang Fang, Andrea Zazzi, Juliana Mueller, Daniel Drayss, Christoph Fuellner, Pablo Marin-Palomo, Alireza Tabatabaei Mashayekh, Arka Dipta Das, Maxim Weizel, Sergiy Gudyriev, Wolfgang Freude, Sebastian Randel, J. Christoph Scheytt, Jeremy Witzens, Christian Koos
Summary: We present an optical arbitrary waveform measurement (OAWM) system that uses a bank of silicon photonic (SiP) frequency-tunable coupled-resonator optical waveguide (CROW) filters for continuous spectral slicing of broadband optical signals. By using a frequency comb as a multi-wavelength local oscillator (LO) and digital signal processing (DSP), the spectral slices are coherently detected and stitched together. Our proof-of-concept experiment demonstrates the feasibility of the scheme.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Aleksandar Nesic, Matthias Blaicher, Emilio Orlandini, Tudor Olariu, Maria Paszkiewicz, Fernando Negredo, Pascal Kraft, Mariia Sukhova, Andreas Hofmann, Willy Doerfler, Carsten Rockstuhl, Wolfgang Freude, Christian Koos
Summary: This paper presents a solver-independent transformation-optics-based technique to reduce the computational effort in modeling 3D freeform waveguides. The technique transforms curved waveguides into equivalent structures with straight trajectories, significantly improving computational efficiency. Experimental tests on 3D-printed waveguides demonstrate the viability and performance of the technique.
Article
Engineering, Electrical & Electronic
Md Mosaddek Hossain Adib, Christoph Fuellner, Juned N. Kemal, Pablo Marin-Palomo, Abderrahim Ramdane, Christian Koos, Wolfgang Freude, Sebastian Randel
Summary: This article introduces a high-resilience colorless coherent architecture for future 100 Gbit/s PON. By generating a frequency comb and using distributed feedback lasers at the ONU side, the architecture allows for ONU laser wavelength drifts and improves receiver sensitivity through advanced digital signal processing methods.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Pascal Maier, Yilin Xu, Mareike Trappen, Matthias Lauermann, Alexandra Henniger-Ludwig, Hermann Kapim, Torben Kind, Philipp-Immanuel Dietrich, Achim Weber, Matthias Blaicher, Clemens Wurster, Sebastian Randel, Wolfgang Freude, Christian Koos
Summary: This paper demonstrates a 3D-printed facet-attached microlens (FaML) technology that enables efficient coupling between multimode fiber arrays or individual cores of multicore fibers and standard arrays of VCSEL or PD. The experiments show the feasibility of this method and its application in building high-speed transceiver modules that meet the IEEE 802.3 standard.
Article
Chemistry, Physical
D. Rieger, S. Guenzler, M. Spiecker, P. Paluch, P. Winkel, L. Hahn, J. K. Hohmann, A. Bacher, W. Wernsdorfer, I. M. Pop
Summary: By using a self-structured aluminum nanojunction, a nonlinearity medium can be formed between superconducting electrodes, acting as a replacement for Josephson junctions. The new type of qubit, gralmonium, exhibits similar performance to the traditional fluxonium qubit, but the lack of a mesoscopic parallel plate capacitor leads to a significantly larger charging energy for the aluminum nanojunction, providing a powerful diagnostic tool for microscopic defects in superconducting materials.
Proceedings Paper
Engineering, Electrical & Electronic
Jonas Krimmer, Lennart Schmitz, Wolfgang Freude, Christian Koos, Sebastian Randel
Summary: Using a few-mode fiber instead of a single-mode fiber significantly reduces link downtimes.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Optics
Daniel Drayss, Dengyang Fango, Christoph Fuellner, Artem Kuzmin, Wolfgang Freude, Sebastian Randel, Christian Koos
Summary: We have developed a slice-less optical-arbitrary-waveform-measurement (OAWM) front-end integrated on a silicon photonic chip and demonstrated its viability by receiving high-speed data signals (100 GBd 64 QAM). Our system covers a bandwidth of more than 160 GHz and utilizes accurate calibration for high-fidelity signal reconstruction.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
C. Eschenbaum, A. Mertens, C. Fuellner, A. Kuzmin, A. Schwarzenberger, A. Kotz, G. Ramann, M. Chen, J. Drisko, B. Johnson, J. Zyskind, J. Marcelli, M. Lebby, W. Freude, S. Render, C. Koos
Summary: We demonstrate a silicon-organic hybrid slot-waveguide modulator based on a temperature-stable organic electro-optic material. The device exhibits a low UπL product and enables high-speed transmission with low drive voltages.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
Pascal Maier, Yung Chen, Yilin Xu, Matthias Blaicher, Dimitri Geskus, Ronald Dekker, Junqiu Liu, Philipp-Immanuel Dietrich, Huanfa Peng, Sebastian Randel, Wolfgang Freude, Tobias J. Kippenberg, Christian Koos
Summary: We present an InP/Si3N4 hybrid integrated ECL that utilizes 3D-printed coupling elements. The ECL demonstrates a tuning range of 90 nm, SMSR above 60 dB, and intrinsic linewidths of 979 Hz. It is also employed as a tunable pump laser for Kerr-comb generation.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
A. Schwarzenberger, A. Kuzmin, C. Eschenbaum, C. Fuellner, A. Mertens, L. E. Johnson, D. L. Elder, S. R. Hammond, L. Dalton, S. Randel, W. Freude, C. Koos
Summary: We demonstrate cryogenic operation of a silicon-organic hybrid (SOH) Mach-Zehnder modulator, which achieves a record-high line rate of 50 Gbit/s on-off-keying (OOK) at 4 K using a dedicated material formulation.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Daniel Drayss, Dengyang Fang, Christoph Fullner, Grigorii Likhachev, Thomas Henauer, Yung Chen, Huanfa Peng, Pablo Marin-Palomo, Thomas Zwick, Wolfgang Freude, Tobias J. Kippenberg, Sebastian Randel, Christian Koos
Summary: We propose an optical arbitrary waveform measurement (OAWM) technique using optical frequency combs as multi-wavelength local oscillators, which eliminates the need for optical slicing filters. In a proof-of-concept experiment, we achieve record-breaking bandwidths exceeding 600 GHz.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Thomas Henauer, Alban Sherifaj, Christoph Fuellner, Wolfgang Freude, Sebastian Randel, Thomas Zwick, Christian Koos
Summary: We present an optical arbitrary-waveform generator (OAWG) that utilizes spectrally sliced signal synthesis and well-defined feedback-stabilized phase relations. The viability of this approach is demonstrated by generating high-quality 16QAM signals with record-high symbol rates of up to 200 GBd.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Pascal Maier, Yilin Xu, Matthias Lauermann, Alexandra Henniger-Ludwig, Hermann Kapim, Mareike Trappen, Torben Kind, Achim Weber, Matthias Blaicher, Philipp-Immanuel Dietrich, Clemens Wurster, Sebastian Randel, Wolfgang Freude, Christian Koos
Summary: In this study, we demonstrate a 3 x 25 Gbit/s SFP transceiver assembly using 3D-printed optical coupling elements to connect multimode multi-core fibers to linear VCSEL and photodiode arrays. Passive alignment ensures average coupling losses below 0.7 dB, conforming to the IEEE 802.3 power budget.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Patrick Matalla, Md Salek Mahmud, Christoph Fullner, Wolfgang Freude, Christian Koos, Sebastian Randel
Summary: This article compares three feedforward non-data-aided clock recovery algorithms suitable for burst-mode reception in PONs and datacenters. Experimental results show that real-time OOK transmission at 3 Gbit/s is achievable with a tolerable clock frequency mismatch of 475 ppm.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)