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
Nanoscience & Nanotechnology
Qi Lin, Ying Xue, Wei Luo, Jie Huang, Liying Lin, Kei May Lau
Summary: Short optical pulses are generated by gain-switched InP-based quantum dash lasers directly grown on Si substrate, demonstrating comparable performance to those on InP substrate and potential applications in Si-based photonics chip for optical on-chip communications.
Article
Engineering, Electrical & Electronic
Claudio Porzi, Fabio Falconi, Marc Sorel, Paolo Ghelfi, Antonella Bogoni
Summary: This paper reports on the characterization of a photonic integrated circuit (PIC) for generating RF carriers in the millimeter-wave to sub-THz region. Experimental results demonstrate effective selection of frequencies and noise reduction, offering new insights for optimizing future wireless communication and sensing network systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Yiming Pan, Hui Zhou, Xingyu Hang, Huiqin Yu, Lu Zhang, Mengting Si, Hao LI, Lixing You, Zhen Wang
Summary: Mid-infrared single-photon detection is an important technology, and superconducting nanowire single photon detectors based on gamma-Nb4N3 film are more sensitive to low energy photons and have high detection efficiency.
Article
Chemistry, Multidisciplinary
Vladimir V. Utochkin, Konstantin E. Kudryavtsev, Alexander A. Dubinov, Mikhail A. Fadeev, Vladimir V. Rumyantsev, Anna A. Razova, Egor Andronov, Vladimir Ya Aleshkin, Vladimir Gavrilenko, Nikolay N. Mikhailov, Sergey A. Dvoretsky, Frederic Teppe, Sergey Morozov
Summary: Stimulated emission in the 2.65-2.75 μm wavelength range at room temperature was observed in HgCdTe quantum well laser heterostructures. The effects of non-uniform excitation beam profile on SE threshold and carrier heating were studied.
Proceedings Paper
Engineering, Electrical & Electronic
Alaa Jabbar Jumaah, Masoumeh Goudarzi, Maira Beatriz Perez Sosa, Jaime Gomez Rivas, Hartmut G. Roskos, Shihab Al-Daffaie
Summary: A novel THz photomixer detector based on interdigitated multilayer graphene on low-temperature-grown GaAs is demonstrated, showing enhanced performance compared to conventional GaAs photomixers with metallic finger contacts. The improvement is explained by the transparency of the graphene electrodes to VIS/NIR radiation, allowing optical excitation of charge carriers not only between, but also below the electrode fingers. Model calculations and simulations were used to explain the enhanced detected photocurrent.
2023 48TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES, IRMMW-THZ
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ming Che, Yuki Matsuo, Kazuya Kondo, Kazutoshi Kato
Summary: An electro-optic frequency comb is down-converted by a uni-traveling-carrier photodiode to generate a pulsed THz train, while a photonics integrated circuit and fiber-optic delay lines are used to alter the time-delay and steer the THz pulsed beam.
2021 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Dennis Maes, Gunther Roelkens, Mohammed Zaknoune, Camiel Op de Beeck, Stijn Poelman, Maximilien Billet, Muhammad Muneeb, Sam Lemey, Emilien Peytavit, Bart Kuyken
Summary: By utilizing waveguide photodiodes on a silicon nitride photonic platform, this study has successfully achieved high responsivity and high-speed detectors, with excellent properties such as low-loss waveguides and immunity to two-foton absorption at high optical power.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Zhangwan Peng, Wanshu Xiong, Ruoyun Yao, Chaodan Chi, Yiti Xiong, Chen Ji
Summary: In this study, we simulated InGaAs/InP Modified Uni-Traveling-Carrier Photodiodes (MUTC-PDs) under high optical power injection with different reverse bias voltages. By optimizing the absorber layer structure and the operating voltage, we achieved an MUTC-PD design with a opto-electric responsivity of 0.16A/W and over 300GHz 3-dB bandwidth under 10 mW/μm^2 optical injection density.
2022 IEEE 7TH OPTOELECTRONICS GLOBAL CONFERENCE, OGC
(2022)
Article
Crystallography
Joshua W. Kleppinger, Sandeep K. Chaudhuri, OmerFaruk Karadavut, Ritwik Nag, Krishna C. Mandal
Summary: Low doped n-type 4H-SiC epitaxial layers were used to fabricate Ni/4H-SiC Schottky radiation detectors, which showed good energy resolutions for alpha particles. The performance of the detectors was mainly determined by the defect parameters in the devices.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Materials Science, Multidisciplinary
M. Ajmal Khan, Yuri Itokazu, Noritoshi Maeda, Masafumi Jo, Hideki Hirayama
Summary: This paper reports on the improvement of electrically-pumped AlGaN UV LD performance by modifying the structure and adding materials. By using specific cladding and doping materials, the injection current density was increased, and weak oscillation was observed near the main spontaneous emission peak. Further theoretical studies showed that changing the waveguide layer material and quantum well thickness can significantly reduce optical-loss and increase the Gamma value.
Article
Chemistry, Physical
A. Jabri, D. Fontanari, A. Roucou, C. Bray, F. Hindle, G. Dhont, G. Mouret, R. Bocquet, A. Cuisset
JOURNAL OF CHEMICAL PHYSICS
(2019)
Article
Optics
J-F Lampin, O. Pirali, Z. S. Buchanan, S. Eliet, M-A Martin-Drumel, J. Turut, P. RoY, F. Hindle, G. Mouret
Article
Optics
Francis Hindle, Robin Bocquet, Anastasiia Pienkina, Arnaud Cuisset, Gael Mouret
Article
Optics
M. Mouelhi, A. Cuisset, F. Hindle, C. Jellali, S. Galalou, H. Aroui, R. Bocquet, G. Mouret, F. Rohart
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2020)
Article
Chemistry, Multidisciplinary
Arnaud Cuisset, Francis Hindle, Gael Mouret, Robin Bocquet, Jonas Bruckhuisen, Jean Decker, Anastasiia Pienkina, Cedric Bray, Eric Fertein, Vincent Boudon
Summary: The study explores the use of THz spectroscopy with long interaction path-lengths for laboratory investigation of greenhouse gases, achieving high-resolution THz signatures of non-polar greenhouse molecules like CH4 and CF4. The research demonstrates the potential for quantitative measurements of N2O and O-3 gas traces in an atmospheric simulation chamber using THz monitoring methods.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
T. S. Hearne, M-H Mammez, D. Mammez, M-A Martin-Drumel, P. Roy, O. Pirali, S. Eliet, S. Barbieri, F. Hindle, G. Mouret, J-F Lampin
Summary: Synchrotron radiation plays a vital role in molecular spectroscopy, especially in the terahertz region. However, the current measurements are limited in resolution. A new spectrometer based on synchrotron radiation and a THz molecular laser has been developed, enabling higher-resolution measurements and the observation of closely spaced spectral features.
Article
Engineering, Electrical & Electronic
Sophie Eliet, Arnaud Cuisset, Francis Hindle, Jean-Francois Lampin, Romain Peretti
Summary: Commercially available terahertz time-domain spectroscopy apparatus is widely used in various fields, but lacks the resolution required for gas spectroscopy. This article introduces a constraint reconstruction method based on modeling of spectroscopic rotational lines, achieving super-resolution spectroscopy for low-molecular weight gases.
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Coralie Elmaleh, Fabien Simon, Jean Decker, Julien Dumont, Fabrice Cazier, Marc Fourmentin, Robin Bocquet, Arnaud Cuisset, Gael Mouret, Francis Hindle
Summary: The development of cavity based infrared spectroscopy techniques, particularly cavity ring-down spectroscopy, has been successful for sensitive measurements. However, the construction difficulty of high finesse cavities has limited its application for THz frequencies. By using a corrugated waveguide and photonic mirrors, we have achieved finesse values of 3500. This has allowed us to measure the absorption of various gases and samples, demonstrating good agreement with a certified gas analyser for industrial samples.
Article
Optics
Jie Chen, Kazuki Nitta, Xin Zhao, Takahiko Mizuno, Takeo Minamikawa, Francis Hindle, Zheng Zheng, Takeshi Yasui
ADVANCED PHOTONICS
(2020)
Article
Optics
D. Fontanari, C. Bray, G. Dhont, G. Mouret, A. Cuisset, F. Hindle, R. Bocquet, K. M. Hickson
