Article
Engineering, Electrical & Electronic
Akshay M. Arabhavi, Rimjhim Chaudhary, Ralf Flueckiger, Diego Marti, Sara Hamzeloui, Filippo Ciabattini, Wei Quan, Martin Leich, Olivier Ostinelli, C. R. Bolognesi
Summary: Uniform Type-II GaInAsSb/InP UTC-PDs demonstrate higher transit limited bandwidth and external responsivity compared to devices with GaAsSb absorbers, indicating enhanced transport properties in GaInAsSb and its superiority as an absorber material for high-speed photodetectors.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jian Huang, Zhijian Shen, Zongti Wang, Zhiqi Zhou, Ziyu Wang, Bo Peng, Weimin Liu, Yiqiao Chen, Baile Chen
Summary: A high-speed mid-wave infrared uni-traveling carrier photodiode based on InAs/InAsSb type-II superlattice was reported for the first time in this letter. The device showed promising performance and potential for applications in high-speed mid-wave infrared systems.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Optics
Yuxin Tian, Bing Xiong, Changzheng Sun, Zhibiao Hao, Jian Wang, Lai Wang, Yanjun Han, Hongtao Li, Lin Gan, Yi Luo
Summary: Novel back-illuminated modified uni-traveling-carrier photodiodes (MUTC-PDs) with wide bandwidth and high saturation power are demonstrated. The effect of cliff layer doping on the electric field distribution is investigated to achieve fast carrier transport. MUTC-PDs with miniaturized device diameter and low contact resistance are fabricated to improve the RC-limited bandwidth. Meanwhile, inductive peaking is implemented to further extend the bandwidth. PDs with 3-pm and 3.6-pm-diameter exhibit a ultrawide bandwidth of 230 GHz and 200 GHz, together with -4.94 dBm and -2.14 dBm saturation power at 220 GHz and 200 GHz, respectively.
Article
Optics
Marcel Grzeslo, Sebastian Duelme, Simone Clochiatti, Tom Neerfeld, Thomas Haddad, Peng Lu, Jonas Tebart, Sumer Makhlouf, Carlos Biurrun-Quel, Jose Luis Fernandez Estevez, Joerg Lackmann, Nils Weimann, Andreas Stoehr
Summary: In this paper, we present waveguide-type modified uni-traveling-carrier photodiodes (MUTC-PDs) with record high output power levels in the WR3.4 band. Indium phosphide (InP) based 1.55 μm MUTC-PDs have been fabricated and characterized. An optimized layer structure and doping profile design taking into account transient carrier dynamics enable achieving maximum output powers of -0.6 dBm at 240 GHz and -2.7 dBm at 280 GHz. The developed energy-balance model studies and optimizes carrier transport at high optical input intensities. The optimized MUTC layer structure exhibits advantageous THz capabilities, with a transit time limited cutoff frequency of 249 GHz and a saturation photocurrent exceeding 20 mA in the WR3.4 band.
Article
Engineering, Electrical & Electronic
Jasper de Graaf, Xinran Zhao, Dimitrios Konstantinou, Menno van den Hout, Sander Reniers, Longfei Shen, Sjoerd van der Heide, Simon Rommel, Idelfonso Tafur Monroy, Chigo Okonkwo, Zizheng Cao, Ton Koonen, Kevin Williams, Yuqing Jiao
Summary: We have demonstrated a waveguide integrated uni-traveling carrier photodiode with a 3 dB bandwidth beyond 110 GHz on an InP-membraneon-silicon platform. By optimizing the design and improving the process, we successfully realized devices as small as 3 x 2 μm(2). An electrical equivalent circuit model based on measured S-parameters revealed ultra-small series resistance and junction capacitance in the diodes. The model also provided insights into the photocurrent dependent characteristics in the bandwidth and responsivity of the devices. Finally, we demonstrated data transmission measurements, showcasing the high speed telecommunication abilities of the UTC-PD.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jian Huang, Zhecheng Dai, Zhijian Shen, Zongti Wang, Zhiqi Zhou, Ziyu Wang, Bo Peng, Weimin Liu, Baile Chen
Summary: In this article, two high-speed mid-wave infrared InAs/InAsSb type-II superlattice uni-traveling carrier photodetectors (PDs) with different graded p-doping profiles in the absorber were studied. It was found that the device with higher p-doping in the absorber had a larger 3-dB bandwidth, but showed higher dark current and lower responsivity compared to the device with lower p-doping. These results are important for further development of high-speed InAs/InAsSb T2SL PDs.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Fengxin Yu, Ta-Ching Tzu, Junyi Gao, Tasneem Fatema, Keye Sun, Prerana Singaraju, Steven M. Bowers, Christopher Reyes, Andreas Beling
Summary: We demonstrate modified uni-traveling carrier (MUTC) waveguide photodiodes on a silicon nitride/silicon (Si3N4/Si) photonic platform using micro-transfer printing. The photodiodes exhibit a high bandwidth of 54 GHz and a low dark current of 30 nA at -3 V. The MUTC photodiode with a short InGaAsP waveguide is directly coupled to the Si3N4 waveguide and designed for efficient light coupling and high-power capability.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Jianwei Chen, Ran Hao, Zheng Zhen, Huaqing Jiang, Kaida Tang, Chenyuan Chen, Shangzhong Jin
Summary: Modified near-ballistic uni-traveling-carrier photodiodes with improved overall performances were studied theoretically and experimentally, obtaining a bandwidth up to 0.2 THz, a 3 dB bandwidth of 136 GHz, and a large output power of 8.22 dBm (99 GHz) under a -2 V bias voltage. The device exhibited good linearity in the photocurrent-optical power curve, even at large input optical power, with a responsivity of 0.206 A/W. The optimized absorption layer and collector layer contributed to the improved performances by maintaining a high built-in electric field and facilitating near-ballistic transmission of uni-traveling carriers. The results have potential applications in high-speed optical communication chips and terahertz sources.
Article
Optics
Ruijuan Tian, Xuetao Gan, Chen Li, Xiaoqing Chen, Siqi Hu, Linpeng Gu, Dries van Thourhout, Andres Castellanos-Gomez, Zhipei Sun, Jianlin Zhao
Summary: Two-dimensional materials are attractive for constructing high-performance photonic chip-integrated photodetectors. The van der Waals PN heterojunction photodetector reported in this study can significantly suppress dark current and improve responsivity. It also exhibits tunability and uniform photodetection over a wide spectral range.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Physics, Applied
Yinan Wang, Leland Nordin, Sukrith Dev, Monica Allen, Jeffery Allen, Daniel Wasserman
Summary: We demonstrate high-speed mid-wave infrared photoconductive detectors using lattice-mismatched, epitaxially grown InSb absorber material with nano-scale hole arrays. The hole patterns allow for post-growth control over the detector response time. The detectors offer potential applications in high-speed sensing/imaging, free-space communication, ranging, or dual-comb spectroscopy.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Tadao Ishibashi, Hiroshi Ito
Summary: This article provides a brief review of the development of uni-traveling carrier photodiodes over the past 25 years, focusing on the key design in their structure. Monte Carlo simulation and experimental results reveal the diffusive nature of electrons even in high quasi-fields. Output linearity is carefully examined, and it is found that the first stage of saturation is influenced by the linearly changing space charge density with operation current. In scaling down UTC-PD for faster operations, the space-charge effect is not significant, but junction self-heating imposes limitations.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Salih Yanikgonul, Xianshu Luo, Guo-Qiang Lo
Summary: Recently, efforts have been made to develop monolithically integrated avalanche photodiodes (APDs) for visible and near-infrared (NIR) wavelengths. However, the fabrication process of these detectors in commercial photonic foundries often requires custom integration flow due to design rule violations. In this study, waveguide-integrated APDs operating at 850 nm were successfully fabricated on a commercial silicon nitride-on-silicon-on-insulator (SiN-on-SOI) photonics platform without any process modifications. The performance of these devices was comparable or even superior to other integrated APDs operating in the NIR wavelengths.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Maria Jabeen, Shyqyri Haxha, Ian Flint, Turgut Ozturk, Martin D. B. Charlton, Fathi AbdelMalek
Summary: This article proposes a unique structure of InP/InGaAs uni-traveling-carrier photodiode (UTC-PD). Compared to traditional photodiodes, the UTC-PD has a simpler epitaxial layer structure while maintaining high bandwidth and high output power loss characteristics. Simulated results show that a large built-in electric field can be generated under illumination, which enhances carrier velocity. Additionally, the photogeneration and light absorption of UTC-PDs are improved by incorporating a step-like internal texture of cones and dots profile in the photo absorption layer.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Jiawei Du, Yongqing Huang, Chaozheng Xiao, Xiaofeng Duan, Kai Liu, Yisu Yang, Xiaomin Ren
Summary: The study shows that the incident optical field distribution significantly affects the output performance of a UTC-PD. Under low power and back illumination, a Gaussian light can achieve a higher 3dB bandwidth, while under front illumination, it cannot achieve good high-speed performance at low bias voltage. Regardless of front or back illumination, a uniform light can achieve higher saturation output power.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Proceedings Paper
Optics
Zhenjie Song, Chun Yang, Zichen Feng
Summary: The paper introduces a novel GaAs0.5Sb0.5/InP type-II waveguide UTC-PD, which shows significant improvements in responsivity and bandwidth compared to traditional devices with In0.53Ga0.47As absorbers. By utilizing a type-II interface design, the device achieves enhanced transport of electrons, leading to improved sensor performance.
OPTICAL SENSING AND DETECTION VI
(2021)
Article
Physics, Multidisciplinary
Florent Bessin, Corentin Naveau, Matteo Conforti, Alexandre Kudlinski, Pascal Szriftgiser, Arnaud Mussot
Summary: In this study, we investigated the phase-sensitive properties of modulation instability with harmonic seeding in passive fiber resonators. Theoretical investigations showed that the dynamics of the system is sensitive to the relative phase between input signal, idler, and pump waves. An advanced multi-heterodyne measurement technique was developed to record the real time evolution of the power and phase of the output cavity field.
COMMUNICATIONS PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Geert Morthier, Gunther Roelkens, Roel Baets
Summary: This article compares the power efficiency of signal transmission over optical carrier and RF carrier. It reveals that in direct optical detection schemes, the noise equivalent power is significantly higher than that of RF signal detection with an antenna. RF transmission has an advantage over optical transmission when the available bandwidth is limited.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Javad Rahimi, Joris Van Kerrebrouck, Bahawal Haq, Johan Bauwelinck, Gunther Roelkens, Geert Morthier
Summary: This paper demonstrates the high wall-plug efficiency and low threshold current of heterogeneously integrated III-V-on-Silicon distributed feedback (DFB) lasers. A wall plug efficiency of over 12% is achieved for a 200 μm long DFB laser diode at 25 degrees C, with up to two times 6 mW of optical power coupled into the silicon waveguide and a side-mode suppression ratio of more than 40 dB. The paper also discusses the non-return-to-zero on-off keying modulation at 20 Gb/s and the transmission over a 2 km long optical fiber.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Myungsoo Kim, Guillaume Ducournau, Simon Skrzypczak, Sung Jin Yang, Pascal Szriftgiser, Nicolas Wainstein, Keren Stern, Henri Happy, Eilam Yalon, Emiliano Pallecchi, Deji Akinwande
Summary: Non-volatile analogue switches made from monolayer molybdenum disulfide can operate at frequencies of 480 GHz and achieve data transmission rates of 100 Gbit s(-1), making them of potential use in sixth-generation communication technology.
NATURE ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Mehdi Jahed, Alexander Caut, Jeroen Goyvaerts, Marc Rensing, Magnus Karlsson, Anders Larsson, Gunther Roelkens, Roel Baets, Peter O'Brien
Summary: This study investigates the angled flip-chip integration of a singlemode 850 nm VCSEL on a silicon nitride PIC. The conditions for high coupling efficiency and low optical feedback are examined using numerical simulations. Experimental results show that increasing the angle decreases the coupling efficiency and optical feedback, and co-directional coupling introduces first-order diffraction loss and further reduces the coupling efficiency.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Arun Bhaskar, Justine Philippe, Etienne Okada, Flavie Braud, Jean-Francois Robillard, Cedric Durand, Frederic Gianesello, Daniel Gloria, Christophe Gaquiere, Emmanuel Dubois
Summary: With the advancement of RF/microwave technology, there is a need for circuits that can meet demanding RF front end specifications. This study introduces a new technique using laser ablation to achieve membrane suspension, allowing for the evaluation of circuit performance without the effects of substrate coupling.
Article
Engineering, Electrical & Electronic
Daniele Pirrone, Antonio Ferraro, Dimitrios C. Zografopoulos, Walter Fuscaldo, Pascal Szriftgiser, Guillaume Ducournau, Romeo Beccherelli
Summary: We demonstrate the effectiveness of frequency selective surface filters in wireless communications at low terahertz (THz) frequencies. The filters have been shown to have minimal impact on signals while effectively rejecting interfering signals, making them a promising solution for efficient spectrum management in future 6G wireless applications.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Abhishek Kumar, Manoj Gupta, Prakash Pitchappa, Nan Wang, Pascal Szriftgiser, Guillaume Ducournau, Ranjan Singh
Summary: Researchers demonstrate a phototunable topological waveguide and demultiplexing chip for 6G communication. The chip features a record-breaking single-channel 160 Gbit/s communication link and excellent channel isolation. This new class of phototunable, on-chip topological terahertz devices hold promise for achieving high-speed and advanced functionalities in future communication systems.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Guillaume Vanderhaegen, Pascal Szriftgiser, Alexandre Kudlinski, Andrea Armaroli, Matteo Conforti, Stefano Trillo, Arnaud Mussot
Summary: We report the observation of parametric gain band distortion in the nonlinear regime of modulation instability in dispersion oscillating fibers. We show that the maximum gain is shifted beyond the boundaries of the linear parametric gain band. Experimental findings are validated using numerical simulations.
Article
Engineering, Electrical & Electronic
Gunther Roelkens, Jing Zhang, Laurens Bogaert, Maximilien Billet, Dongbo Wang, Biwei Pan, Clemens J. Kruckel, Emadreza Soltanian, Dennis Maes, Tom Vanackere, Tom Vandekerckhove, Stijn Cuyvers, Jasper De Witte, Isaac Luntadila Lufungula, Xin Guo, He Li, Senbiao Qin, Grigorij Muliuk, Sarah Uvin, Bahawal Haq, Camiel op de Beeck, Jeroen Goyvaerts, Guy Lepage, Peter Verheyen, Joris Van Campenhout, Geert Morthier, Bart Kuyken, Dries Van Thourhout, Roel Baets
Summary: Silicon photonics is a disruptive technology that has rapidly developed in the field of integrated photonics. It has enabled the development of high-performance components and complex photonic integrated circuits on a small scale. However, there is still a need for non-native functions to further enhance the overall performance and cost-effectiveness of silicon photonic systems. This paper introduces micro-transfer printing as a technology for integrating non-native materials and opto-electronic components on silicon photonic platforms, enabling the integration of a wide range of materials/devices on a wafer scale in a parallel manner.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Gaetan Leveque, Yan Pennec, Pascal Szriftgiser, Alberto Amo, Alejandro Martinez
Summary: The realization of photonic crystal waveguides with high topological protection allows for robust light propagation and compact device design through sharp bends and splitters. This study evaluates the conversion between helical topological edge modes at sharp bends and splitters using valley topological triangular resonators coupled to an input waveguide. Numerical simulations show evidence of backward scattering and helicity conversion at cavity corners and splitters, which can result in transmission minima and split resonances. A phenomenological model is introduced to quantify these effects and compare with numerical simulations, demonstrating the importance of helicity conversion at corners and sharp bends. This approach enables predictive calculations for large devices and is crucial for the design of photonic devices with compactness and low losses through topological conduction of electromagnetic waves.
Article
Optics
Guillaume Vanderhaegen, Pascal Szriftgiser, Alexandre Kudlinski, Matteo Conforti, Andrea Armaroli, Arnaud Mussot
Summary: The thermalization process of the Fermi-Pasta-Ulam-Tsingou recurrence process in optical fibers is observed. The transition from a reversible regime to an irreversible one is shown, revealing a spectrally thermalized state. The study is significant for understanding the thermalization process in optical fibers.