Article
Nanoscience & Nanotechnology
Yang Li, Guanqing Zhang, Yutao Tang, Xuecai Zhang, Wenfeng Cai, Yanjun Liu, Tun Cao, Guixin Li
Summary: A metal-silicon hybrid metasurface is proposed to generate strong third harmonic signals from an amorphous silicon film. By integrating the film into a gold plasmonic nanocavity and controlling the periods of the gold meta-atoms, the efficiency of the third harmonic generation process is greatly enhanced and provides new routes for developing silicon photonic devices with high optical nonlinearity.
Article
Chemistry, Multidisciplinary
Yuqiang Fang, Xin Feng, Dong Wang, Yang Ding, Tianquan Lin, Tianyou Zhai, Fuqiang Huang
Summary: Polarization-independent second harmonic generation has been achieved in van der Waals Nb3SeI7 crystals, which have a breathing Kagome lattice structure. The Nb3SeI7 crystals show a strong SHG response due to their noncentrosymmetric crystal structure. This work provides the first layered nonlinear optical crystal with polarization-independent SHG effect, opening up new possibilities for nonlinear optics.
Article
Engineering, Electrical & Electronic
Sruti Menon, Varun Raghunathan
Summary: We demonstrate second harmonic generation (SHG) enhancement in a resonant metasurface composed of amorphous silicon sub-wavelength gratings and an underlying gallium nitride (GaN) layer. The design and characterization of the sub-wavelength grating dimensions, spectral resonances, angular sensitivity, electric field, and non-linear polarization profiles are discussed. Experimental studies on the fabricated structures, including linear and nonlinear SHG properties, are also presented. The SHG spectral measurements show a 1300-fold enhancement for 1460 nm fundamental excitation, attributed to the trade-off between the in-plane to out-of-plane nonlinear polarization ratio and the decrease in resonance field strength.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Yang Li, Xuecai Zhang, Yutao Tang, Wenfeng Cai, Kuan Liu, Ningbin Mao, Kingfai Li, Junhong Deng, Yanjun Liu, Tun Cao, Guixin Li
Summary: Research shows that incorporating alpha-GST into nanocavity metasurface can greatly enhance third harmonic generation, and provide a powerful platform for characterizing the third-order nonlinear susceptibility of the active medium in the cavity.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Xian-Xin Wu, Wen-Yu Jiang, Xiao-Feng Wang, Li-Yun Zhao, Jia Shi, Shuai Zhang, Xinyu Sui, Zhe-Xue Chen, Wen-Na Du, Jian-Wei Shi, Qian Liu, Qing Zhang, Yong Zhang, Xin-Feng Liu
Summary: We have developed an efficient inch-scale SHG source through a solution-processed method by assembling gold nanoparticles with porous anodic alumina templates. Our device achieves multiresonance in both visible and near-infrared regions, providing strong electric field enhancement at the gap region. The SHG radiation produced is polarization-independent and shows wide-angle nonlinear response thanks to the unique geometry of the nanostructure.
Article
Nanoscience & Nanotechnology
Qing Leng, Huanhuan Su, Jianqiang Liu, Lin Zhou, Kang Qin, Qianjin Wang, Junqi Fu, Shan Wu, Xuejin Zhang
Summary: The study investigates the second-harmonic generation of monolayer transition metal dichalcogenides on suspended silver film, showing a significant enhancement of the SHG signal. The enhancement is attributed to the electric field amplification induced by symmetric surface plasmon polaritons (SPPs) in the silver grating.
Article
Chemistry, Multidisciplinary
Yoonsoo Rho, SeokJae Yoo, Daniel B. Durham, DongJun Kang, Andrew M. Minor, Costas P. Grigoropoulos
Summary: Nonlinear optical response is a useful tool for studying the properties of materials, but its weak signal and limited reach make it difficult to probe deep-subwavelength-scale nonlinear optics. In this study, we propose a new method using an SHG-active plasmonic nanotip to achieve efficient second harmonic generation (SHG) nanoscopy. Our simulations suggest that enhancing the nonlinear response of the sample or suppressing the tip's response can lead to a high near-field SHG contrast, providing evidence of quantum mechanical nonlinear energy transfer. Furthermore, this technique can be used to study nanoscale corrosion and other physicochemical phenomena.
Article
Nanoscience & Nanotechnology
Tomoya Kimura, Yoshito Y. Tanaka, Tsutomu Shimura
Summary: This study reveals that controlling the process of second-harmonic generation at the nanoscale is challenging but important in photonic applications. By exciting the bright dipole mode with linearly polarized light, a cross-shaped single-element plasmonic nanoantenna can generate radially polarized ring-shaped second harmonic radiations with axial symmetry. This finding provides a foundation for the development of novel plasmonic nanodevices that can simultaneously perform polarization control and efficient wavelength conversion.
Article
Chemistry, Multidisciplinary
Johannes Schust, Florian Mangold, Florian Sterl, Niklas Metz, Thorsten Schumacher, Markus Lippitz, Mario Hentschel, Harald Giessen
Summary: Nonlinear optical plasmonics investigates the emission of plasmonic nanoantennas using nonlinear spectroscopy. The study introduces nonlinear spatially resolved spectroscopy (NSRS), which can image the k-space and spatially resolve the THG signal of gold nanoantennas. The research demonstrates the ability to image various oscillation modes inside the nanostructures and determine spatial emission hotspots. The NSRS setup enables the investigation of a nonlinear self-enhancement process of nanoantennas under critical laser excitation.
Article
Chemistry, Multidisciplinary
Qi Ai, Florian Sterl, Han Zhang, Jianfang Wang, Harald Giessen
Summary: A high-quality plasmon-fiber cavity in a doubly resonant configuration can exhibit second-harmonic generation with significant enhancement compared to gold nanoparticles. By carefully adjusting the fiber size and tuning the plasmon response of a gold nanoparticle, a giant SH response with high conversion efficiency can be achieved under the doubly resonant condition.
Article
Nanoscience & Nanotechnology
Marco Piccardo, Antonio Ambrosio
Summary: The study demonstrates a new method to generate pure vortex beams using a single metasurface plate and a polarizer, achieving higher purity, efficiency, and compactness compared to traditional methods. Existing approaches typically involve complex optical elements, whereas this new method simplifies the system structure and allows control over radial modes. The high purity, considerable creation efficiency, and compactness of this approach make it a powerful tool for pure vortex generation, even with large topological charges.
Article
Physics, Applied
Tomoaki Nambu, Tomohiro Nakahara, Yuma Yasuda, Yasufumi Fujiwara, Masayoshi Tonouchi, Masahiro Uemukai, Tomoyuki Tanikawa, Ryuji Katayama
Summary: We have proposed highly efficient microcavity second harmonic generation devices, and achieved a normalized wavelength conversion efficiency of 0.15% W-1 in a designed and fabricated a-plane GaN vertical monolithic microcavity second harmonic generation device pumped with a femtosecond laser. The efficiency was comparable to theoretical estimations, indicating the possibility of realizing ultra-compact and ultra-efficient devices pumped with long-pulsed or continuous wave lasers with even more pronounced resonance enhancement.
APPLIED PHYSICS EXPRESS
(2023)
Article
Chemistry, Physical
Natalie Fehn, Ehsan Vahidzadeh, Karthik Shankar, Ueli Heiz, Aras Kartouzian
Summary: This study presents the surface second harmonic generation spectra of supported gold nanoparticles with titania coating, which can provide additional information on the morphology and size distribution of the sample.
APPLIED SURFACE SCIENCE
(2022)
Article
Optics
Xiyuan Lu, Gregory Moille, Ashutosh Rao, Daron A. Westly, Kartik Srinivasan
Summary: The research demonstrates efficient second-harmonic generation in silicon photonics through a combination of effective chi((2)) nonlinearity, resonant enhancement, and perfect phase matching. The breakthrough shows significantly higher conversion efficiency and output power than previous works, paving the way for further integration of self-referenced frequency combs and optical frequency references in the field.
Article
Materials Science, Multidisciplinary
C. J. Valencia-Caicedo, E. I. Chaikina, A. V. Khomenko
Summary: We numerically studied the second-harmonic generation (SHG) from subwavelength GaAs relief gratings with and without Au nano-stripes. Our results showed that adding Au nano-stripes significantly enhanced the SHG efficiency, with more than 500 times enhancement and an absolute value of 1.2 x 10(-3)% when the intensity of pump light was 1 GW/cm(2).
RESULTS IN PHYSICS
(2022)
Article
Energy & Fuels
Yuxiao Zhu, Daniel W. Newbrook, Peng Dai, C. H. Kees de Groot, Ruomeng Huang
Summary: This study demonstrates the application of artificial neural network, a deep learning technique, in forward modeling the maximum power generation and efficiency of a thermoelectric generator for the first time. The neural networks, with the coupling of genetic algorithm, can optimize the geometrical structure of the generator quickly and accurately, providing a new and cost-effective approach for system level design and optimization of thermoelectric generators and other energy harvesting technologies.
Article
Physics, Applied
N. Chery, M. Zhang, R. Monflier, N. Mallet, G. Seine, V. Paillard, J. M. Poumirol, G. Larrieu, A. S. Royet, S. Kerdiles, P. Acosta-Alba, M. Perego, C. Bonafos, F. Cristiano
Summary: In this study, the heavy doping of phosphorus (P) in thin Silicon-On-Insulator (SOI) layers was thoroughly investigated using UV nanosecond Laser Thermal Annealing (LTA). The role of the remaining thin crystalline silicon layer after amorphization was emphasized, as it provided nucleation seeds for liquid phase recrystallization. Optimized laser annealing conditions were identified to achieve perfect crystallinity, negligible P out-diffusion, and a nearly flat P depth profile.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
M. Humbert, Y. Hallez, V Larrey, F. Fournel, E. Palleau, V Paillard, A. Cuche, L. Ressier
Summary: This study successfully used atomic force microscopy nanoxerography to assemble colloidal nanodiamonds containing NV centers on patterned surfaces. The number of deposited nanodiamonds can be controlled by tuning the surface potentials, resulting in a single-photon emitter with good selectivity. The mechanisms of the assembly were confirmed through numerical simulations, offering opportunities for quantum technologies in nanophotonics.
Article
Chemistry, Analytical
Xingshi Yu, Xia Chen, Milan M. Milosevic, Weihong Shen, Rob Topley, Bigeng Chen, Xingzhao Yan, Wei Cao, David J. Thomson, Shinichi Saito, Anna C. Peacock, Otto L. Muskens, Graham T. Reed
Summary: GER amplifier and annealing process can change the optical properties of silicon, enabling flexible testing and post-fabrication trimming of silicon photonics devices, reducing production costs and increasing yield.
Article
Nanoscience & Nanotechnology
Clement Majorel, Christian Girard, Arnaud Arbouet, Otto L. Muskens, Peter R. Wiecha
Summary: Optical interactions are crucial for the optical response of nanostructures, especially in complex environments. This study proposes a method based on deep convolutional neural networks to describe aperiodic assemblies of plasmonic nanostructures, providing high accuracy and spectral resolution of coupling effects. This method is of great interest in the field of metasurfaces and has significant advantages in applications where optical interactions play a crucial role.
Article
Physics, Applied
M. Montagnac, G. Agez, A. Patoux, A. Arbouet, V. Paillard
Summary: This study investigates the near- and far-field optical properties of silicon nanostructures under linear polarization (Gaussian beam) and azimuthally or radially focused cylindrical vector beams. The results show that the resonance wavelength and dipole orientation of the magnetic or electric dipole mode can be affected by shape anisotropy.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Melodie Humbert, Romain Hernandez, Nicolas Mallet, Guilhem Larrieu, Vincent Larrey, Frank Fournel, Francois Guerin, Etienne Palleau, Vincent Paillard, Aurelien Cuche, Laurence Ressier
Summary: Improving the brightness of single-photon sources is crucial for the development of efficient nanodevices for quantum communications. Using nanoxerography by atomic force microscopy, we were able to position quantum nanoemitters on silicon nanoantennas with high selectivity and enhanced brightness. This proof of principle opens the way for spatial control of quantum nanoemitters coupled to optimized nanoantennas and offers potential applications in quantum technologies.
Article
Environmental Sciences
Mohamed E. Zayed, Abdallah Kamal, Mohamed Ragab Diab, Fadl A. Essa, Otto L. Muskens, Manabu Fujii, Ammar H. Elsheikh
Summary: Increasing the evaporation zone and performance of a double-slope solar distiller (DSSD) was achieved through the utilization of a prismatic absorber basin covered by linen wicks and dual parallel spraying nozzles underneath the glass cover. The modified DSSD showed higher cumulative distillation yield, energy efficiency, exergy efficiency, and cost per liter of distilled yield compared to the traditional double slope solar distiller (TDSSD). The results demonstrated the effectiveness and economic benefits of the modifications made to the DSSD-WPB&DPSN.
Article
Physics, Multidisciplinary
Ana Estrada-Real, Ioannis Paradisanos, Peter R. Wiecha, Jean-Marie Poumirol, Aurelien Cuche, Gonzague Agez, Delphine Lagarde, Xavier Marie, Vincent Larrey, Jonas Mueller, Guilhem Larrieu, Vincent Paillard, Bernhard Urbaszek
Summary: Optical Mie resonators based on silicon nanostructures provide the capability to control light-matter interactions through CMOS compatible nanofabrication. The coupling between a MoSe2 monolayer and dielectric nanoresonators is experimentally demonstrated and verified through numerical simulations. The study shows that the absorption of MoSe2 can be enhanced and tuned via the near-field of nanoresonators, providing complementary information to traditional near-field microscopy equipment.
COMMUNICATIONS PHYSICS
(2023)
Article
Optics
Yuxiao Zhu, Daniel W. Newbrook, C. H. de Groot, Ruomeng Huang
Summary: The market for Internet-of-things (IoT) with integrated wireless sensor networks is growing rapidly, creating a high demand for sustainable micro-Watt-scale power supplies. Radiative cooling (RC) combined with thermoelectric generator (TEG) offers a novel and sustainable energy source for energy harvesting. This work provides a comprehensive analysis of the RC-TEG concept through 3D finite element method simulation, investigating the impact of various parameters and demonstrating continuous power supply capability using real-time environmental data from Singapore and London.
JOURNAL OF PHYSICS-PHOTONICS
(2023)
Article
Optics
Martin Montagnac, Yoann Brule, Aurelien Cuche, Jean-Marie Poumirol, Sebastien J. Weber, Jonas Mueller, Guilhem Larrieu, Vincent Larrey, Franck Fournel, Olivier Boisron, Bruno Masenelli, Gerard Colas des Francs, Gonzague Agez, Vincent Paillard
Summary: This study demonstrates that the emission of europium ions can be controlled by manipulating the polarization and shape of the excitation beam. Additionally, silicon nanorings can be used as nanoantennas to spatially shape the electric and magnetic fields. The experimental results and numerical simulations confirm that the emission of europium ions is influenced by the excitation beam and the dimensions of the silicon nanorings.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
Wei Xiao, Peng Dai, H. Johnson Singh, Idris A. Ajia, Xingzhao Yan, Peter R. Wiecha, Ruomeng Huang, C. H. (Kees) de Groot, Otto L. Muskens, Kai Sun
Summary: This study utilizes a genetic algorithm and a transfer matrix method to design and optimize a multimaterial thin-film OSR for broadband radiative cooling. The optimized structure, consisting of 18 alternating layers of SiN, SiO2, and Ta2O5 on an Al mirror backreflector, exhibits low solar absorption and high broadband infrared emissivity. The fabricated OSR demonstrates good thermal-optical properties and achieves efficient net cooling power under one sun total solar irradiance in space.
Article
Chemistry, Multidisciplinary
Meiling Zhang, Jean-Marie Poumirol, Nicolas Chery, Herve Rinnert, Alaa E. Giba, Remi Demoulin, Etienne Talbot, Fuccio Cristiano, Teresa Hungria, Vincent Paillard, Fabrice Gourbilleau, Caroline Bonafos
Summary: We successfully demonstrate the experimental realization of plasmonic hyperdoped Si nanocrystals embedded in silica by a combination of sequential low energy ion implantation and rapid thermal annealing. We find that phosphorus dopants are incorporated into the nanocrystal cores at concentrations up to six times higher than P solid solubility in bulk Si. We explain the nanocrystal growth at high P doses as a result of Si recoiling atoms generated in the matrix by P implantation, which enhance Si diffusivity and provide the Si nanocrystals.
Proceedings Paper
Engineering, Electrical & Electronic
Kaveh Delfanazari, Otto L. Muskens
Summary: We present novel chip-integrated tunable optical modulators operating in visible to near-infrared telecommunication bands. These devices are based on plasmonic nano-antenna and nano-circuit metasurface arrays fabricated on niobium (Nb) thin metallic films. We demonstrate high modulation depth of 60% at wavelength λ = 716 nm and maximum extinction of 95% at wavelength λ = 650 nm for our nano-antenna based modulators. Similarly, our near-infrared nano-circuit array-based modulators achieve a maximum extinction of 88% at wavelength λ = 1380 nm. The polarization-sensitive optical modulators can be controlled by altering the geometrical parameters of their subwavelength elements and unit cells.
2022 PHOTONICS & ELECTROMAGNETICS RESEARCH SYMPOSIUM (PIERS 2022)
(2022)
Article
Chemistry, Multidisciplinary
Konstantina Alexaki, Maria Eleni Kyriazi, Joshua Greening, Lapatrada Taemaitree, Afaf H. El-Sagheer, Tom Brown, Xunli Zhang, Otto L. Muskens, Antonios G. Kanaras
Summary: In this study, we successfully demonstrated the rapid and accurate detection of SARS-CoV-2 infection without the need for PCR amplification using UCNPs and GO.
