Article
Chemistry, Multidisciplinary
Artem Chizhov, Marina Rumyantseva, Nikolay Khmelevsky, Andrey Grunin
Summary: In this study, colloidal perovskite nanocrystals were used to enhance the photoconductivity of nanocrystalline ZnO films. The synthesis process of the nanocrystalline ZnO and perovskite nanocrystals was carefully controlled, and the enhanced photoconductivity and the maximum photoconductivity values were observed. The structure, morphology, and other properties of the synthesized nanocrystals were also investigated, and the potential applications of the results were discussed.
Article
Chemistry, Physical
Zhoufeng Jiang, Yiteng Tang, Antara Debnath Antu, Shashini M. Premathilaka, Marilyn Louise Cayer, Carol A. Heckman, Pavel Moroz, Mikhail Zamkov, Liangfeng Sun
Summary: Using the cation-exchange method, PbS nanoribbons are successfully converted into CdS nanoribbons, resulting in the expansion of the emission spectrum. CdS nanoribbons exhibit blue band-edge photoluminescence under UV excitation and show multicolor emissions in cathodoluminescence spectroscopy. Further research reveals that the lifetime of the midgap states in CdS nanoribbons is significantly longer than that of the band-edge states.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Zhoufeng Jiang, Yiteng Tang, Antara Debnath Antu, Shashini M. Premathilaka, Marilyn Louise Cayer, Carol A. Heckman, Pavel Moroz, Mikhail Zamkov, Liangfeng Sun
Summary: Colloidal PbS nanoribbons are successfully transformed into CdS nanoribbons using cation-exchange method, expanding the emission spectrum from infrared to visible. CdS nanoribbons exhibit blue band-edge photoluminescence under UV light excitation and show multicolor (blue, green, and red) cathodoluminescence.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Optics
Changkun Feng, Xiao Wang, Bin Miao, Zhiqi Gu, Jiadong Li
Summary: This paper presents a real-time measurement technology for ultrahigh-aspect-ratio silicon nitride waveguide ring resonators. By tracking different resonant modes and eliminating interference noise, high precision and temperature correlation were achieved on a 35 mm waveguide ring resonator.
Article
Materials Science, Multidisciplinary
V. S. Gerasimov, A. E. Ershov, R. G. Bikbaev, I. L. Rasskazov, I. L. Isaev, P. N. Semina, A. S. Kostyukov, V. Zakomirnyi, S. P. Polyutov, S. Karpov
Summary: The Kerker effect has been largely abandoned but experienced a revival with the emergence of all-dielectric nanophotonics, and can now be observed in nanostructures made of high-index materials. By adjusting the geometrical parameters of Al arrays, the lattice Kerker effect can be tailored in the UV and visible wavelength ranges, presenting a challenge for achieving this with other materials. The results of this study have far-reaching implications for plasmonics and the further application of the Kerker effect.
Article
Optics
C. A. A. Franken, A. van Rees, L. Winkler, Y. Fan, D. Geskus, R. Dekker, D. H. Geuzebroek, C. Fallnich, P. J. M. van der Slot, K-J Boller
Summary: A hybrid-integrated diode laser in the visible spectral range has been demonstrated, achieving wide tunability and high coherence using an AlGaInP optical amplifier and a Si3N4 feedback circuit. The technology has significant implications for applications in biophotonics, precision metrology, and quantum technology.
Article
Chemistry, Multidisciplinary
Ye Luo, Chunlei Sun, Maoliang Wei, Hui Ma, Yingchun Wu, Zequn Chen, Hao Dai, Jialing Jian, Boshu Sun, Chuyu Zhong, Junying Li, Kathleen A. Richardson, Hongtao Lin, Lan Li
Summary: Photonic mechanical sensors offer advantages over electronic counterparts, but existing flexible photonics strategies face challenges. To address these, a waveguide-integrated flexible mechanical sensor based on photonic crystal microcavities is proposed, with exceptional performance and potential applications.
Review
Nanoscience & Nanotechnology
Guilherme Almeida, Reinout F. Ubbink, Maarten Stam, Indy du Fosse, Arjan J. Houtepen
Summary: This Review focuses on the InP-based colloidal quantum dots (QDs) and their applications in photonic technologies. These QDs have tunable optoelectronic properties and are suitable for visible and near-infrared photonics. The paper discusses the properties, fabrication methods, defect passivation strategies, and heterostructure design of InP QDs, as well as provides an overview of their technological status in various photonic applications.
NATURE REVIEWS MATERIALS
(2023)
Article
Chemistry, Physical
Oisin Garrity, Alvaro Rodriguez, Niclas S. Mueller, Otakar Frank, Patryk Kusch
Summary: The optoelectronic properties of nanoscale systems are determined by their dielectric function, which is affected by various factors. Imaging local dielectric variations with dual s-SNOM allows for the extraction of dielectric function values. Experimental results are reliable and have been validated in contaminated samples.
APPLIED SURFACE SCIENCE
(2022)
Article
Optics
Chengli Wang, Jin Li, Ailun Yi, Zhiwei Fang, Liping Zhou, Zhe Wang, Rui Niu, Yang Chen, Jiaxiang Zhang, Ya Cheng, Junqiu Liu, Chun-Hua Dong, Xin Ou
Summary: Researchers demonstrate the generation of a single soliton microcomb on high-quality-factor microresonators fabricated on 4H-SiC-on-insulator thin films. They also observe wide spectral translation of chaotic microcombs from near-infrared to visible due to the second-order nonlinearity of SiC. This highlights the potential of SiC as a platform for future low-loss integrated nonlinear and quantum photonics.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Physical
Drew Spera, David Pate, Griffin C. Spence, Corentin Villot, Chineme Jeanfrances Onukwughara, Daulton White, Ka Un Lao, Umit Ozgur, Indika U. Arachchige
Summary: Group IV alloy nanocrystals are direct energy gap semiconductors with high elemental abundance, low toxicity, and composition-tunable absorption and emission properties. In this study, a colloidal strategy for the synthesis of Ge1-x-ySiySnx alloys with strong size confinement effects and composition-tunable properties was reported.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rajesh Komban, Simon Spelthann, Michael Steinke, Detlev Ristau, Axel Ruehl, Christoph Gimmler, Horst Weller
Summary: By downsizing LiYF4:Pr3+ crystals to the nanoscale, stable colloidal dispersions with unexpected and intense emission in the visible spectrum have been obtained.
NANOSCALE ADVANCES
(2022)
Article
Astronomy & Astrophysics
Antonin Wargnier, G. Poggiali, A. Doressoundiram, T. Gautier, P. Beck, A. Buch, N. Ruscassier, S. Fornasier, M. A. Barucci
Summary: The next sample return mission of JAXA, called MMX, aims to investigate the origin of the martian moons Phobos and Deimos. As part of the mission preparation, a new laboratory spectral simulant was developed to accurately reproduce the red and featureless spectrum of Phobos. This simulant showed a better match for the Phobos spectrum in the visible and near-infrared compared to previously proposed simulants.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Hengyang Xiang, Mahima Chaudhary, Charlotte Tripon-Canseliet, Zhuoying Chen
Summary: A novel approach was proposed to develop microwave photoconductive switches functional in the short-wave-infrared spectrum window by directly depositing solution-processed colloidal upconversion nanocrystals onto low-temperature-grown gallium arsenide (LT-GaAs). The hybrid upconversion Er3+-doped NaYF4 nanocrystal/LT-GaAs photoconductive switch showed a more than 2-fold increase in the ON/OFF ratio compared to the control device, with a maximum value of 20.6 dB at an input signal frequency of 20 MHz.
Review
Physics, Applied
Xuetao Gan, Dirk Englund, Dries Van Thourhout, Jianlin Zhao
Summary: Two-dimensional (2D) materials with layered structures have exceptional electronic and optical attributes, making them promising for various functions in light wave technology. In this study, we discuss state-of-the-art optical intensity modulators based on 2D materials, focusing on their operation spectral ranges determined by optical bandgaps. By leveraging the rich electronic structures and light-matter interactions of different 2D materials, we explore the working mechanisms and device architectures of modulators at specific wavelength ranges. These modulators have potential applications in fiber and chip optical communications, as well as chemical bond spectroscopy, free-space communications, and environment/health sensing.
APPLIED PHYSICS REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Teemu Hakkarainen, Marcelo Rizzo Piton, Elisabetta Maria Fiordaliso, Egor D. Leshchenko, Sebastian Koelling, Jefferson Bettini, Helder Vinicius Avanco Galeti, Eero Koivusalo, Yara Galva Gobato, Ariano de Giovanni Rodrigues, Donald Lupo, Paul M. Koenraad, Edson Roberto Leite, Vladimir G. Dubrovskii, Mircea Guina
PHYSICAL REVIEW MATERIALS
(2019)
Article
Nanoscience & Nanotechnology
Marcelo Rizzo Piton, Teemu Hakkarainen, Joonas Hilska, Eero Koivusalo, Donald Lupo, Helder Vinicius Avanco Galeti, Yara Galvao Gobato, Mircea Guina
NANOSCALE RESEARCH LETTERS
(2019)
Article
Optics
Hoy-My Phung, Hermann Kahle, Jussi-Pekka Penttinen, Patrik Rajala, Sanna Ranta, Mircea Guina
Article
Chemistry, Analytical
Alessandro Belardini, Grigore Leahu, Emilija Petronijevic, Teemu Hakkarainen, Eero Koivusalo, Marcelo Rizzo Piton, Soile Talmila, Mircea Guina, Concita Sibilia
Article
Nanoscience & Nanotechnology
Eero Koivusalo, Joonas Hilska, Helder V. A. Galeti, Yara Galvao Gobato, Mircea Guina, Teemu Hakkarainen
Article
Nanoscience & Nanotechnology
Abhiroop Chellu, Eero Koivusalo, Marianna Raappana, Sanna Ranta, Ville Polojarvi, Antti Tukiainen, Kimmo Lahtonen, Jesse Saari, Mika Valden, Heli Seppanen, Harri Lipsanen, Mircea Guina, Teemu Hakkarainen
Summary: Several passivation techniques for close-to-surface InAs/GaAs quantum dots were compared for their ability to preserve optical properties. It was found that AlNx passivation method significantly reduces surface recombination velocity and shows long-term stability.
Article
Nanoscience & Nanotechnology
Abhiroop Chellu, Joonas Hilska, Jussi-Pekka Penttinen, Teemu Hakkarainen
Summary: A new quantum-confined semiconductor material based on GaSb quantum dots embedded in a single-crystalline AlGaSb matrix has been demonstrated. The GaSb quantum dots exhibit an indirect-direct bandgap crossover at telecom wavelengths, showing promise for applications in infrared quantum optics and quantum photonic integration. The properties of GaSb quantum dots, including a type I band alignment and narrow spectral lines with low inhomogeneous broadening, make them suitable for non-classical single-QD light sources and high-quality photonic devices.
Article
Optics
Jonathan N. Tinsley, Satvika Bandarupally, Jussi-Pekka Penttinen, Shamaila Manzoor, Sanna Ranta, Leonardo Salvi, Mircea Guina, Nicola Poli
Summary: This study achieved the generation of high-power, narrow-linewidth laser radiation for laser cooling and spectroscopy of cadmium and strontium atoms. Utilizing VECSEL frequency doubling, laser outputs at 457.75nm and 460.86nm were successfully produced.
Article
Optics
Joshua C. Hill, William K. Holland, Paul D. Kunz, Kevin C. Cox, Jussi-Pekka Penttinen, Emmi Kantola, David H. Meyer
Summary: VECSELs are attractive devices for high-power, narrow-linewidth light sources in the visible and UV spectra, which are in growing demand for quantum information and sensing research. In this study, we demonstrate 3.5MHz full-width half-maximum Rydberg-state spectroscopy using VECSELs, benefiting from their high output power and stable frequency characteristics. These measurements provide evidence that intra-cavity frequency-doubled VECSELs can perform precision spectroscopy at and below the MHz level, and are a promising tool for contemporary and future quantum technologies.
Proceedings Paper
Engineering, Electrical & Electronic
Hoy-My Phung, Hermann Kahle, Jussi-Pekka Penttinen, Patrik Rajala, Sanna Ranta, Mircea Guina
VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) X
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Steven E. Rako, Gregory J. Fetzer, Cory Baumgarten, Sandy Sandalphon, Celine D'Orgeville, Steven Floyd, Luke Hill, Nathan Woody, Jussi-Pekka Penttinen, Mircea Guina
VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) X
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Yushi Kaneda, Dustin Mitten, Michael Hart, Stephen H. Warner, Jussi-Pekka Penttinen, Mircea Guina
VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) X
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Hermann Kahle, Hoy-My Phung, Jussi-Pekka Penttinen, Patrik Rajala, Antti Tukiainen, Sanna Ranta, Mircea Guina
2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Hermann Kahle, Jussi-Pekka Penttinen, Hoy-My Phung, Patrik Rajala, Antti Tukiainen, Sanna Ranta, Mircea Guina
VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASERS (VECSELS) IX
(2019)
Article
Multidisciplinary Sciences
Teemu Hakkarainen, Emilija Petronijevic, Marcelo Rizzo Piton, Concita Sibilia
SCIENTIFIC REPORTS
(2019)
