Article
Optics
Gia Quyet Ngo, Emad Najafidehaghani, Ziyang Gan, Sara Khazaee, Malte Per Siems, Antony George, Erik P. Schartner, Stefan Nolte, Heike Ebendorff-Heidepriem, Thomas Pertsch, Alessandro Tuniz, Markus A. Schmidt, Ulf Peschel, Andrey Turchanin, Falk Eilenberger
Summary: This study demonstrates a method to achieve second-harmonic generation in functionalized optical fibers by directly growing highly nonlinear MoS2 monolayers on the fiber's core. The approach is scalable and can be generalized to other materials and waveguide systems.
Review
Chemistry, Multidisciplinary
Jeong Young Park, Hyunhwa Lee, Yujin Park, Kyoungjae Song
Summary: Hot carriers, generated through light excitation of metal nanostructures, play a crucial role in solar energy conversion and catalytic reactions. Adopting a metal-semiconductor platform enables the collection and utilization of these high-energy carriers. Recent experimental studies have demonstrated the enhancing effect of surface plasmons on hot carrier generation. Furthermore, it has been shown that hot carriers can improve solar energy conversion performance and control catalytic activity.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Francesco De Leonardis, Richard A. Soref
Summary: In this study, we theoretically investigate the efficient second harmonic generation (SHG) in a lattice-matched N-doped (GaP)(N) / (Si-2)(M) short-period superlattice integrated in a strip waveguide on the silicon-on-insulator platform. We calculate the X-(2) spectrum and conversion efficiency for different superlattice structures and pump wavelengths.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Alexey S. Ustinov, Liubov A. Osminkina, Denis E. Presnov, Leonid A. Golovan
Summary: This study reports the circular anisotropy of third-harmonic generation in an array of silicon nanowires, demonstrating the manifestation of the photonic spin Hall effect mediated by the special guided-like mode structure in each SiNW. Experimental results show significant dependence of the third-harmonic signal on the polarization state of incident radiation and the spatial orientation of the SiNW array.
Article
Chemistry, Multidisciplinary
Yoel Negrin-Montecelo, Artur Movsesyan, Jie Gao, Sven Burger, Zhiming M. Wang, Sylvain Nlate, Emilie Pouget, Reiko Oda, Miguel Comesana-Hermo, Alexander O. Govorov, Miguel A. Correa-Duarte
Summary: Mastering chirality at the nanoscale is important for scientists in various fields. Recently, researchers have proposed the use of chiral plasmonic nanostructures in photocatalysis to drive polarization-dependent photochemistry. In this study, inorganic nanometric chiral templates were used to assemble gold and titanium dioxide nanoparticles, leading to the formation of plasmon-based photocatalysts with polarization-dependent reactivity. This approach opens up new possibilities for applications in chirality and photocatalysis, particularly in plasmon-induced chiral photochemistry.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
A. Aarab, R. Azouit, V Reiher, Y. Berube-Lauziere
Summary: A measurement-based quantum feedback protocol is developed for spin-state initialization in a gate-defined double quantum dot spin qubit coupled to a superconducting cavity. The protocol improves qubit state initialization by enabling robust preparation of the spin in shorter time and achieving higher fidelity. Additionally, it is effective at high temperatures.
Article
Optics
L. Rodriguez-Sune, J. Trull, C. Cojocaru, N. Akozbek, D De Ceglia, M. A. Vincenti, M. Scalora
Summary: This study reports experimental results on second and third harmonic generation from nano gold layers under TE- and TM-polarized incident light pulses, discussing the role of hot electrons in third harmonic generation. Experimental observations suggest that hot electrons trigger the third harmonic generation in the vertical direction.
Article
Optics
Guanglian Cheng, Qiyuan Yi, Qiyuan Li, Zhiwei Yan, Fanglu Xu, Yongchao Zou, Ting Li, Yi Zou, Yu Yu, Li Shen
Summary: This paper proposes and experimentally demonstrates a polarization-splitting dual-band grating coupler for polarization diversity and wavelength division (de)multiplexing operation. The coupler has a periodically arranged structure with square holes and requires only a single etch step for fabrication. The measured results show relatively low coupling efficiency. This coupler has the potential to improve the performance of future integrated WDM passive optical networks.
Article
Engineering, Electrical & Electronic
Tao Ma, Shaohui Liu, Yongsheng Tian, Heng Liu, Fang Wang
Summary: A graphene-hBN-silicon hybrid plasmonic rib waveguide is designed for refractive index sensing, achieving a high FOM value by optimizing size parameters and showing remarkable propagation performance peaks. The sensing structure demonstrates good sensitivity for homogeneous and surface sensing, making it suitable for ultra-compact on-chip micro-nano photonic biochemical sensing systems.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Michael Hartelt, Pavel N. Terekhin, Tobias Eul, Anna-Katharina Mahro, Benjamin Frisch, Eva Prinz, Baerbel Rethfeld, Benjamin Stadtmueller, Martin Aeschlimann
Summary: This paper discusses the importance of understanding the differences between photon-induced and plasmon-induced hot electrons and proposes a method using a femtosecond pump-probe scheme combined with theoretical analysis to separate the energy and momentum distribution of plasmon-induced hot electrons.
Article
Optics
Jie Xu, Eric Plum, Vassili Savinov, Nikolay Zheludev
Summary: In this study, second harmonic generation was demonstrated using an amorphous silicon metamaterial fabricated on the tip of an optical fiber. The metamaterial is a double-chevron array that supports a closed-mode resonance for the fundamental wavelength at 1510 nm, with a quality factor of 30. The normalized resonant second harmonic conversion efficiency calculated per intensity and square of interaction length is approximately 10(-11) W-1, exceeding the previously achieved value for a silicon metamaterial by two orders of magnitude.
Article
Physics, Applied
Hailun Xie, Lili Gui, Yiwen Liu, Fengbin Lin, Zhongshan Zhang, Kun Xu
Summary: This study proposes an amorphous silicon metasurface based on a quasi-bound state in the continuum (q-BIC) with a theoretical Q-factor of up to 930. By analyzing the influences of slot offset parameter and size of added symmetric defect, it is found that the designed metasurface exhibits significantly enhanced two-photon absorption response due to local near-field enhancement by tailored high-Q quasi-BIC resonance.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Bertrand Busson
Summary: The properties of bulk contribution to sum-frequency generation in a multilayer system are discussed, with particular focus on the interference effects in the transmission geometry. Experimental evidence of these interference fringes is provided, and their origin is explained in terms of phase mismatch and group velocity mismatch. The findings have important implications for the understanding of resonant processes and the design of multilayer systems for sum-frequency generation.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Optics
Yali Sun, Artem Larin, Alexey Mozharov, Eduard Ageev, Olesia Pashina, Filipp Komissarenko, Ivan Mukhin, Mihail Petrov, Sergey Makarov, Pavel Belov, Dmitry Zuev
Summary: This paper investigates the application of electric fields in nanoscale engineering. It demonstrates the generation of a static electric field at the interface of a metal-semiconductor nanostructure through femtosecond laser irradiation. Experimental results show the influence of the optically induced static electric field on the second harmonic generation signal. The estimated value of the static electric field generated by light in this nanoantenna holds potential for various applications.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Fujian Yu, Runlin Miao, Ke Yin, Xin Zhang, Tian Jiang
Summary: In this paper, a two-stage nonlinear system is built to broaden a 12.5 GHz EO-comb. The system achieves significant spectral broadening and shows potential for application in parallel gas detection.
IEEE PHOTONICS JOURNAL
(2022)
