Article
Multidisciplinary Sciences
M. Z. Alam, Z. Yang, M. Sheik-Bahae, J. S. Aitchison, M. Mojahedi
Summary: Plasmonics is a promising technology with applications in nanophotonics and biosensing, utilizing interference of light to achieve highly directional surface plasmon excitation for various purposes such as plasmonic waveguides and optical sensing.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
Ying Chen, Jian Zhou, Zhixin Ding, Min Zhang
Summary: This study investigates the formation mechanism of double Fano resonances in a hybrid sensing structure composed of subwavelength dielectric grating/metal-dielectric-metal (MDM) waveguide/periodic photonic crystal, based on surface plasmon resonance (SPR) and coupled mode theory (CMT). The results show that the dynamically adjustable double discrete states generated in the subwavelength dielectric grating and MDM waveguide are coupled with the continuous state formed in the periodic photonic crystal, achieving double Fano resonances. Furthermore, the double Fano resonances can be dynamically modulated under angular modulation by adjusting the structure parameters. The proposed structure demonstrates potential applications in sensing with a high figure of merit (FOM) value and the ability to detect refractive index ranges simultaneously.
Article
Agronomy
Jiwei Qu, Hongji Li, Zhe Zhang, Xiaobo Xi, Ruihong Zhang, Kangquan Guo
Summary: This study explores the optimal control parameters to ensure smooth MMS of a wheeled robot through experiments and verification, obtaining effective results with practical value.
Article
Multidisciplinary Sciences
Ling-Yu Dou, De-Zhong Cao, De-Qin Xu, An-Ning Zhang, Xin-Bing Song
Summary: This study demonstrates the positive-negative sub-wavelength interference effect without correlation using a thermal light source. By counting the realizations where the intensities at specific symmetric points meet certain criteria, the distribution of these realizations shows a sub-wavelength effect. Positive and negative interference patterns are confirmed under proper constraints.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Keith Attenborough
Summary: Analytical approximations for the acoustical properties of a rigid-porous matrix perforated by labyrinthine slits have been developed using classical theories. Enhanced low-frequency absorption can result from high permeability contrast and additional tortuosity.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Zahra Rahimian Omam, Amir Ghobadi, Bahram Khalichi, Ekmel Ozbay
Summary: This paper presents a sub-wavelength dynamic metasurface design using phase-change materials to artificially engineer the spectral thermal signature of an object, allowing for real-time control of emission for radiative cooling and thermal camouflage purposes.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Thomas Gerard, Christopher Parsonson, Zacharaya Shabka, Benn Thomsen, Polina Bayvel, Domanic Lavery, Georgios Zervas
Summary: This study proposes a hybrid WTS solution optimized with artificial intelligence, achieving record wavelength switch times below 900 ps across 6.05 THz of optical bandwidth, and evaluates a method for further bandwidth scaling.
Article
Nanoscience & Nanotechnology
Qingyuan Wang, Guozhi Hou, Yu Zhu, Teng Sun, Jun Xu, Kunji Chen
Summary: To enhance the efficiency of a solar thermophoto-voltaic system, a nanolayered narrowband thermal emitter is proposed. The thermal emitter consists of alternating layers of a-SiNx and a-SiNyOz deposited on a polished silicon substrate covered by metallic molybdenum. The fabricated emitters exhibit good narrowband absorption at the designed emission wavelength and can be tuned by changing the thickness of the multilayers. The simulated solar thermophotovoltaic system efficiency reaches 28.9% based on the proposed emitter.
ACS APPLIED NANO MATERIALS
(2022)
Article
Optics
Minkun Jin, Yujian Wu, Zhiyu Zhang, Jinmeng Xiang, Chongfeng Guo
Summary: Developing multi-mode luminescent anti-counterfeiting materials is an effective strategy to ensure the security of important documents and information. In this study, a multi-mode luminescent material Ba2GdTaO6: Mn4+, Er3+ was successfully synthesized and its luminescence properties were discussed. The potential application in anti-counterfeiting was demonstrated by screen printing fluorescent security patterns.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Hui-Hsin Hsiao, Bo-Ting Xu
Summary: A double-stacked cross-shaped metal-dielectric-metal (MDM) resonator was proposed for achieving penta-wavelength mid-infrared thermal emission, with four distinct emission bands that can be tuned through a polarization rotator, allowing for simultaneous detection of multi-band molecular absorption fingerprint.
Article
Physics, Applied
Wentao Cai, Yuta Furusawa, Jia Wang, Jeong-Hwan Park, Yaqiang Liao, Hea-Jeong Cheong, Shugo Nitta, Yoshio Honda, Markus Pristovsek, Hiroshi Amano
Summary: High-quality InGaN sub-micrometer platelets with atomically flat surfaces were successfully grown on GaN substrates by metalorganic vapor phase epitaxy. These platelets can serve as templates for long wavelength micro-light-emitting diodes.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Chen Ying, Zhou Jian, Ding Zhi-Xin, Zhang Min, Zhu Qi-Guang
Summary: This paper proposes a composite micro-nano structure of sub-wavelength dielectric grating/metal-dielectric-metal (MDM) waveguide/periodic photonic crystal based on the diffraction principle and mode coupling theory. By analyzing the angle spectrum of reflection, the transmission characteristics of surface plasmon polaritons, and the generation mechanism of double Fano resonances, it is found that the physical mechanism of double Fano resonances is the coupling between the surface plasmon resonance and the waveguide mode resonance. The influence of structural parameters on double Fano characteristics is quantitatively analyzed, and the evolution law of double Fano resonances is explored by observing the change of reflection spectra of resonance curves.
ACTA PHYSICA SINICA
(2022)
Article
Chemistry, Multidisciplinary
Jiangang Li, Kexin Chen, Juan Wei, Yun Ma, Ruyi Zhou, Shujuan Liu, Qiang Zhao, Wai-Yeung Wong
Summary: Excitation-wavelength-dependent (Ex-De) emission materials are promising for advanced photonics with adjustable luminescence behavior. A platinum(II) complex-based phosphorescent soft salt S1 with Ex-De photoluminescence property exhibits a red-shifted emission peak and color change upon excitation at different wavelengths, showing potential for on-off switching by manipulating Pt(II) distances. High-level anticounterfeiting applications with on-demand multicolor displays are demonstrated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Physics, Applied
Fengqi Zhou, Yuqing Wang, Xiao Zhang, Jiawei Wang, Zhimin Liu, Xin Luo, Zhenbin Zhang, Enduo Gao
Summary: A bilayer metamaterial consisting of double graphene strips and square-ring graphene is proposed to achieve plasmon induced transparency (PIT). Dynamic adjustable PIT is investigated by modulating the Fermi levels of graphene and adjusting the coupling distance between the two graphene structures, showing that PIT gradually disappears with increasing coupling distance. The clear relationships between dips of PIT and modes of CMT are described, which are influenced by the relative location of resonant points of bright and dark modes.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Jiaojiao Xu, Nan Zhao, Ban Qin, Minghan Qu, Xiuxiu Wang, Buyinga Ridi, Chensha Li, Yachen Gao
Summary: Researchers have made progress in the precise modulation of the photoresponses of photoactuated liquid crystalline elastomer (LCE) materials. By incorporating nanogold and nanosilver into LCE nanocomposites, wavelength-selective actuation has been achieved, leading to the development of an intelligent electronic device capable of responding to different wavelength bands.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Optics
O. O. Versolato, J. Sheil, S. Witte, W. Ubachs, R. Hoekstra
Summary: In this article, recent findings from the Advanced Research Center for Nanolithography (ARCNL) on using 1 and 2 μm wavelength solid-state lasers for tin target preparation and for driving hot and dense plasma are presented.
Article
Astronomy & Astrophysics
K. -F. Lai, D. Manalili, W. Ubachs, R. Cooke, M. Pettini, N. de Oliveira, E. J. Salumbides
Summary: A spectroscopic study of atomic oxygen (O i) was conducted to obtain a dataset of transition frequencies and level energies. The results showed good agreement with low energy levels and low principal quantum numbers, but significant deviations for high energy levels and high principal quantum numbers. This dataset is valuable for studying absorption in the line of sight to distant quasars.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Physics, Multidisciplinary
Kun Liang, Jiaqi Xu, Yuanqing Wang, Hai-Feng Lu, Wim Ubachs
Summary: A specific value of the Gruneisen ratio gamma (0) = 0.064 +/- 0.004 has been found to universally describe the active modes in gases, based on comparisons with measured Brillouin shifts in various gases. This finding has important applications in extrapolating properties of ideal gases to high-temperature regimes where they cannot be easily measured.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Erez Gershnabel, Mingkun Chen, Chenkai Mao, Evan W. Wang, Philippe Lalanne, Jonathan A. Fan
Summary: This study proposes a three-dimensional freeform nano-photonic platform that optimizes basic geometric structure parameters using gradient-based shape optimization and considering near-field interactions between structures. It demonstrates high diffraction efficiencies and polarization control in various metagratings and shows experimental evidence of tailored polarization response as a function of wavelength. The methodology presented here will facilitate the development of robust and high-performance nanophotonic technologies.
Article
Optics
Jiho Hong, Jorik Van De Groep, Nayeun Lee, Soo Jin Kim, Philippe Lalanne, Pieter G. Kik, Mark L. Brongersma
Summary: Modern sensing and imaging applications require accurate measurements of light wave properties such as intensity, wavelength, directionality, and polarization. This study demonstrates the use of engineered optical resonances in nanostructures to achieve selective detection of circularly polarized light. By patterning a thin silicon layer into a dislocated nanowire-array, it is possible to detect circularly polarized light with high efficiency. The presence of periodic dislocations enables selective excitation of nonlocal, guided-mode resonances for one handedness of light.
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: This study presents a modal-based tool that explains the appearance of disordered monolayers of resonant meta atoms. It shows that the combination of plasmonic and Fabry-Perot resonances creates unique iridescent visual effects different from those observed in natural nanostructures or thin-film interferences.
Article
Computer Science, Interdisciplinary Applications
Tong Wu, Denis Arrivault, Wei Yan, Philippe Lalanne
Summary: This article introduces MAN, a software that computes and normalizes the quasinormal modes of almost any electromagnetic resonator. It has been developed over the past ten years and features toolboxes for various computations in low and high frequency regimes. The software can interface with COMSOL Multiphysics and other frequency-domain numerical solvers.
COMPUTER PHYSICS COMMUNICATIONS
(2023)
Editorial Material
Optics
Krzysztof Pachucki, Thomas Udem, Wim Ubachs, Paolo Crivelli, Stefan Ulmer
EUROPEAN PHYSICAL JOURNAL D
(2023)
Article
Physics, Atomic, Molecular & Chemical
K. -f. Lai, M. Beyer, W. Ubachs
Summary: Two-photon UV-photolysis of hydrogen sulfide (H2S, HDS, D2S) is used to produce highly excited vibrational levels in hydrogen (H2, HD, D2). By exciting the wave function density of the X1Ig+ electronic ground state via two-photon transitions, the ro-vibrational levels in the first F1Ig+ outer well state are probed and their energies are determined. The accuracy of level energies in the F(v, J) levels is up to 4 x 10-3 cm-1 for H2, and 0.5 cm-1 for HD and D2 due to ac-Stark effects. Quasibound resonances (X1Ig+(v=6, J=23) in H2 and X1Ig+(v=17, J=15) in D2) are detected for the first time.
JOURNAL OF MOLECULAR SPECTROSCOPY
(2023)
Article
Optics
Lars Behnke, Edcel J. Salumbides, Guido Goeritz, Yahia Mostafa, Dion Engels, Wim Ubachs, Oscar Versolato
Summary: This article describes a laser system that generates high-energy pulses at a wavelength of 2 μm with tunable pulse widths from 10-24 ns. It consists of an optical parametric oscillator that generates mJ-level signal seed radiation and an optical parametric amplifier that boosts the output to 800 mJ of combined signal and idler when pumped with 2 J pulses of 1064-nm laser light. The system is characterized in the spatial, temporal, and spectral domains while operating at a 10 Hz repetition rate with KTP crystals. The output pulses approach flat-top spatial and box-shaped temporal profiles due to the saturation effect, making it suitable for various applications. The amplified pulses can be imaged down to sub-100 μm diameters, making this laser system a suitable driver for plasma sources of extreme ultraviolet light.
Article
Optics
Yahia Mostafa, Zoi Bouza, James Byers, Ievgeniia Babenko, Wim Ubachs, Oscar O. Versolato, Muharrem Bayraktar
Summary: This article presents a method for simultaneous 1D imaging and broadband spectroscopy of a laser-produced plasma source of extreme ultraviolet light using a tapered zone plate matched to the dispersion of a transmission grating. The design and fabrication of zone plates in the 5-80 nm wavelength range with spatial resolution of -10 μm and spectral resolution of -0.8 nm are described. The imaging spectrometer is benchmarked with a solid tin target LPP, and plane wave propagation simulations confirm its performance.
Article
Physics, Multidisciplinary
F. M. J. Cozijn, M. L. Diouf, W. Ubachs
Summary: The saturated absorption spectrum of the hyperfineless S(0) quadrupole line in the (2-0) band of H2 was measured using the NICE-OHMS technique at & lambda; = 1189 nm under cryogenic conditions (72 K). This study presents the first recorded Lamb dip of a molecular quadrupole transition. The observations of narrow Lamb dip and Doppler-detuned resonances provide new insights into the redshifted and blueshifted recoil components and challenge the current theoretical predictions.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Jung-Hwan Song, Philippe Lalanne, Min-Kyo Seo, Mark L. L. Brongersma
Summary: Mean-field theory-based models are commonly used for designing optical metamaterials. However, for applications involving layered device architectures, the dispersive properties and interfacial boundary conditions of the metamaterials need to be considered. In this study, we propose a method to calculate the optical transfer function for one-dimensional optical metamaterials, taking into account the dispersive properties of the effective index and the effective interfacial impedance.
Article
Chemistry, Multidisciplinary
Adrian Agreda, Tong Wu, Adrian Hereu, Mona Treguer-Delapierre, Glenna L. Drisko, Kevin Vynck, Philippe Lalanne
Summary: The paper presents a modal-based tool that can accurately analyze the physical mechanisms and features of colloidal disordered monolayers, and investigates the unique iridescent visual appearances created by the combination of plasmonic and Fabry-Perot resonances.
Article
Optics
N. Holsch, I. Doran, F. Merkt, J. Hussels, C. -F. Cheng, E. J. Salumbides, H. L. Bethlem, K. S. E. Eikema, M. Beyer, W. Ubachs, Ch. Jungen
Summary: The ionization energy and dissociation energy of HD have been determined using various spectroscopy methods, improving previous values and resolving discrepancies with theoretical calculations.
