Article
Nanoscience & Nanotechnology
Melissa J. Goodwin, Cornelis A. M. Harteveld, Meint J. de Boer, Willem L. Vos
Summary: Periodic arrays of deep nanopores in silicon are important for silicon nanophotonics. Previous studies focused on achieving deep nanopores with high aspect ratios, but resulted in structural imperfections. This study aims to realize cylindrical nanopores for better comparison with theory and simulations. By optimizing etching parameters and implementing a multistep process, cylindrical nanopores with high aspect ratios were achieved, suitable for silicon nanophotonic structures.
Article
Engineering, Electrical & Electronic
Moshe Katzman, Yonatan Piasetzky, Evyatar Rubin, Ben Barenboim, Maayan Priel, Muhammed Erew, Avinoam Zadok, Haim Suchowski
Summary: Photonic integrated circuits play a central role in various applications, and photonic quantum computing requires an integrated optics architecture for improved stability and performance. This work demonstrates high-fidelity directional couplers for single-qubit gates in photonic integrated waveguides, presenting specific designs for reduced sensitivity to wavelength variations and fabrication errors. Experimental results show enhanced wavelength tolerance, highlighting the potential for scaling high fidelity gates in integrated quantum optics architectures.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jae S. Hwang, Jin Xu, Aaswath P. Raman
Summary: Researchers have designed and experimentally demonstrated an approach using doped III-V semiconductors to simultaneously control the spectral peak, bandwidth, and directionality of infrared emissivity. InAs-based gradient epsilon-near-zero (ENZ) photonic structures exhibit broadband directional emission with different spectral bandwidths and ranges depending on doping concentration profile and thickness. This approach provides a versatile photonic platform for dynamically controlling broadband spectral and directional emissivity in applications such as heat transfer and infrared sensing.
ADVANCED MATERIALS
(2023)
Review
Optics
Guo-Jing Tang, Xin-Tao He, Fu-Long Shi, Jian-Wei Liu, Xiao-Dong Chen, Jian-Wen Dong
Summary: Recent research in topological photonics has made significant progress in proposing and realizing novel topological phenomena, designing and fabricating high-performance photonic devices. Photonic crystals, as a powerful platform for controlling the flow of light, have been widely used to reveal different topological phases of light and demonstrate topological photonic functionalities. Furthermore, topological photonic crystals have found applications in both passive and active photonics.
LASER & PHOTONICS REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Otto Cranwell Schaeper, Johannes E. Froch, Sejeong Kim, Zhao Mu, Milos Toth, Weibo Gao, Igor Aharonovich
Summary: This study demonstrates the fabrication of functional photonic devices based on 4H Silicon Carbide using a Faraday cage-based oblique angle etch method. The fabricated suspended microring resonators exhibit high-quality factors, showing potential for enhancing the properties of SiC in integrated on chip quantum photonics in the future.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Babak Vosoughi Lahijani, Nicolas Descharmes, Raphael Barbey, Gael D. Osowiecki, Valentin J. Wittwer, Olga Razskazovskaya, Thomas Sudmeyer, Hans Peter Herzig
Summary: This article investigates the propagation properties of optical modes supported at the free surface of a 1D photonic crystal. Structures optimized for long-distance propagation of optical surface waves are designed and fabricated, and the existence of optical surface waves in the visible spectral range is experimentally demonstrated for the first time.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Optics
Denis Iakushev, Servando Lopez-Aguayo
Summary: We investigate the effect of an external magnetic field with arbitrary direction on the photonic band of a superlattice structure comprising alternating dielectric and magneto-optical plasma layers. By considering the electrodynamical anisotropy of the superlattice in the presence of the magnetic field, we derive the dispersion equations and observe that the photonic spectrum of the superlattice splits into two branches due to the magnetic field. Interestingly, our results show that a previously photo-isolating superlattice can become entirely photo-conducting, regardless of the direction of the applied magnetic field. These findings could be useful for the design and construction of new optical diode-like devices.
Article
Nanoscience & Nanotechnology
Simone Iadanza, Jesus Hernan Mendoza-Castro, Taynara Oliveira, Sharon M. Butler, Alessio Tedesco, Giuseppe Giannino, Bernhard Lendl, Marco Grande, Liam O'Faolain
Summary: This paper presents a novel design of high Q-factor silicon nitride (SiN) 1D photonic crystal (PhC) cavities side-coupled to curved waveguides, which can operate with both silica and air cladding. The etched 1D PhC cavity sidewalls angle is engineered to achieve high Q-factors over a wide range of upper cladding compositions, resulting in the highest calculated Q-factor for non-suspended asymmetric SiN PhC structures. The SiN PhC cavities are demonstrated to be used in hybrid external cavity laser configuration, enabling mode-hop free single mode laser operation with high power output and side-mode suppression ratios. Moreover, these devices are applied as compact and energy efficient optical sensors, exhibiting high sensitivity to refractive index changes in the surrounding medium.
Article
Nanoscience & Nanotechnology
Junhyeong Kim, Jae-Yong Kim, Jinhyeong Yoon, Hyeonho Yoon, Hyo-Hoon Park, Hamza Kurt
Summary: The on-chip optical power splitter is a common and important device in photonic integrated circuits. Inverse design methods allow for the exploration of design parameters and the discovery of complex optical responses. This article reports on two inverse-designed optical power splitters and provides experimental verification and numerical results.
Article
Engineering, Electrical & Electronic
Takemasa Tamanuki, Hiroyuki Ito, Toshihiko Baba
Summary: This study focuses on an optical beam scanning device utilizing photonic crystal slow-light waveguides and switch trees, operated through thermo-optic tuning at a fixed wavelength. With a custom prism lens for beam collimation, the device achieved two-dimensional scanning with a small divergence angle and low power consumption.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Tahmid H. Talukdar, Anna L. Hardison, Judson D. Ryckman
Summary: Photonic moire lattices provide a platform for manipulating light, and there is strong interest in understanding how moire effects can be tailored in compact optical technologies. In this work, we map the moire effects of one-dimensional photonic moire lattices composed of width-modulated silicon nanowires and demonstrate various behaviors by tailoring parameters such as crystal size, symmetry, and moire fringe phase.
Review
Nanoscience & Nanotechnology
Xuezhi Ma, Nathan Youngblood, Xiaoze Liu, Yan Cheng, Preston Cunha, Kaushik Kudtarkar, Xiaomu Wang, Shoufeng Lan
Summary: This article discusses the method of changing the optical properties of 2D materials by engineering the photonic environment, emphasizing the importance of the interaction between the environment and the materials for efficiency. By modifying dielectric and metallic environments, the light-matter interaction of 2D materials can be effectively shaped.
Article
Engineering, Electrical & Electronic
Y. Trabelsi, N. Ben Ali, Francis Segovia-Chaves, Herbert Vinck Posada
Summary: This paper theoretically investigates the properties and tuning methods of photonic quasicrystals built using hybrid materials, achieving a tunable photonic band gap with resonant peaks. The properties are modulated by superconductor temperature, dielectric layer thickness, and quasi-periodic structure lattice parameters, with discussions on the behavior of photonic band gaps under different conditions.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Omid Jafari, Sasan Zhalehpour, Wei Shi, Sophie LaRochelle
Summary: The slow-light silicon modulator enables high-speed PAM operation without using an electrical DAC, with advantages such as compact footprint, low energy consumption, and large electro-optic bandwidth. Experimental results demonstrate high stability against fabrication variations, making it suitable for applications requiring compact and energy-efficient modulators.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Stephen R. Anderson, Amir Begovic, Z. Rena Huang
Summary: An integrated RF-photonic link using a slow-light enhanced silicon electro-optic modulator, a single mode Si optical waveguide, and a silicon-germanium photodetector was fabricated. By optimizing the parameters of the Si Mach-Zehnder modulator, high SFDR and modulation efficiency were achieved in the slow-light region.
IEEE PHOTONICS JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Md Arafat Mahmud, The Duong, Jun Peng, Yiliang Wu, Heping Shen, Daniel Walter, Hieu T. Nguyen, Naeimeh Mozaffari, Grace Dansoa Tabi, Kylie R. Catchpole, Klaus J. Weber, Thomas P. White
Summary: The mixed-dimensional 2D-3D perovskite solar cells, incorporating long carbon-chain organic spacer cations, have shown promising results in terms of enhancing both device efficiency and stability. By carefully balancing the composition of 2D and 3D perovskite, researchers aim to take advantage of the specific properties of each material phase for further improvement.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Augusto Martins, Juntao Li, Ben-Hur Borges, Thomas F. Krauss, Emiliano R. Martins
Summary: This study reveals the fundamental limits of doublet systems and presents a universal design strategy. The researchers discovered the relationship between focal length and spacer thickness, and identified the dependence of performance limitations and field of view on resolution.
Article
Chemistry, Multidisciplinary
Lisa M. Miller, Matthew D. Simmons, Callum D. Silver, Thomas F. Krauss, Gavin H. Thomas, Steven D. Johnson, Anne-Kathrin Duhme-Klair
Summary: The study developed a diagnostic tool for detecting beta-lactamase in urine, which can be used for diagnosing multi-drug resistant infections. The tool can be used with urine preservatives or blood in lateral flow assays to detect active beta-lactamases.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Panaiot G. Zotev, Yue Wang, Luca Sortino, Toby Severs Millard, Nic Mullin, Donato Conteduca, Mostafa Shagar, Armando Genco, Jamie K. Hobbs, Thomas F. Krauss, Alexander I. Tartakovskii
Summary: Transition metal dichalcogenides are used to fabricate WS2 double-pillar nanoantennas with multiple Mie resonances, enabling Purcell enhancement and increased fluorescence. Postfabrication atomic force microscope repositioning and rotation achieve small gaps for potential applications such as strong Purcell enhancement and optical trapping. The study highlights the advantages of using transition metal dichalcogenides for nanophotonics by exploring applications enabled by their properties.
Article
Materials Science, Multidisciplinary
Augusto Martins, Kezheng Li, Guilherme S. Arruda, Donato Conteduca, Haowen Liang, Juntao Li, Ben-Hur Borges, Thomas F. Krauss, Emiliano R. Martins
Summary: Metasurfaces have great potential to provide new functionality for miniaturized and low-cost optical systems. This study investigates the influence of polarization control on the performance of form-birefringent metalens and shows that it can correct for both spherical and off-axis aberrations using a single element, while allowing switching between high resolution and wide field of view operation. This is an important step towards the integration of miniaturized optical systems.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Donato Conteduca, Guilherme S. Arruda, Isabel Barth, Yue Wang, Thomas F. Krauss, Emiliano R. Martins
Summary: Resonant photonic sensors have significant applications in personalized healthcare diagnostics and environmental monitoring. However, there is currently a lack of comprehensive theoretical models for understanding the impact of practical limitations such as losses. In this study, a new model is proposed, which reveals that losses have a stronger impact on the resonance amplitude than on the Q-factor. Furthermore, it is shown that optimizing the detection limit is achieved by balancing the Q-factor and amplitude, rather than maximizing the Q-factor.
Article
Optics
Felipe Bernal Arango, Filippo Alpeggiani, Donato Conteduca, Aron Opheij, Aobo Chen, Mohamed Abdelrahman, Thomas F. Krauss, Andrea Alu, Francesco Monticone, Laurens Kuipers
Summary: Near-field scanning optical microscopy is a powerful technique for imaging below the diffraction limit. In this study, a cloaked near-field probe is designed and fabricated by controlling and balancing its electric and magnetic polarizabilities through nanostructuring. The probe-induced perturbations are largely suppressed, allowing for non-invasive near-field optical microscopy of classical and quantum nanosystems.
Article
Optics
Jianchao Zhang, Haowen Liang, Yong Long, Yongle Zhou, Qian Sun, Qinfei Wu, Xiao Fu, Emiliano R. Martins, Thomas F. Krauss, Juntao Li, Xue-Hua Wang
Summary: Metalens research has made significant advances by designing polarization-insensitive dimer nano-antennas, which enables polarization-insensitive ultrahigh numerical aperture oil-immersion operation. This technology greatly improves efficiency at visible wavelength and has been successfully applied in confocal scanning microscopic imaging.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Guilherme S. Arruda, Donato Conteduca, Isabel Barth, Yue Wang, Thomas F. Krauss, Emiliano R. Martins
Summary: This paper investigates the angular tolerance of distributed resonances in metasurfaces that support BICs and GMRs, and compares the performance of perturbed structures with BIC resonances. The study finds that perturbed structures feature higher angular tolerance and can achieve high-Q resonances more suitable for applications.
Article
Biophysics
Giampaolo Pitruzzello, Steven Johnson, Thomas F. Krauss
Summary: Many novel susceptibility tests are being developed to tackle the worldwide problem of antimicrobial resistance. Electrical impedance is considered a fundamental indicator of bacterial viability and by studying the electrical response of individual bacteria to an antibiotic challenge, researchers can detect antimicrobial action close to its biological limit. The findings suggest that 60 minutes is the fundamental lower limit of response time for a realistic susceptibility test at clinically relevant antibiotic concentrations.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Donato Conteduca, Giuseppe Brunetti, Isabel Barth, Steven D. D. Quinn, Caterina Ciminelli, Thomas F. F. Krauss
Summary: Optical tweezers have greatly contributed to bioscience research by allowing the accurate study of biological particles. The focus has been on trapping individual particles, but biological systems are inherently heterogeneous, so studying variations within the same population is crucial. In this study, a resonant metasurface is experimentally demonstrated to trap a large number of nanoparticles in parallel, enabling large-scale multiplexed optical trapping at the nanoscale. This breakthrough will facilitate the study of heterogeneous biological systems.
Article
Chemistry, Multidisciplinary
Samuel F. J. Blair, Joshua S. S. Male, Stuart A. A. Cavill, Christopher P. P. Reardon, Thomas F. F. Krauss
Summary: In this study, the structural, electrical, and optical properties of ITO were comprehensively investigated and their relationship with deposition conditions was demonstrated. Guided mode resonances were used to determine the dispersion curves of the deposited material, and these were correlated with structural and electrical measurements to extract relevant material parameters. The findings showed that the carrier density, mobility, plasma frequency, electron effective mass, and collision frequency varied with deposition conditions, and the high-frequency permittivity (e(8)) could significantly differ from the assumed constant value of e???????(8) = 3.9 in many papers. This analysis provides a valuable reference for the characterization of other transparent conducting oxides (TCOs) in photonics research.
Article
Biophysics
Shrishty Bakshi, Pankaj K. Sahoo, Kezheng Li, Steven Johnson, Michael J. Raxworthy, Thomas F. Krauss
Summary: Chronic wounds are often superficially assessed and lack proper analysis of wound biomarkers. This study introduces a novel therapeutic system that can non-invasively sample and quantify biomarkers, aiding in wound healing and treatment.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Daniel Walter, Jun Peng, Klaus Weber, Kylie R. Catchpole, Thomas P. White
Summary: This study discusses the impact of transparent conductive oxides on power loss in perovskite solar cells. It reveals that these oxides play a critical role across the transport layer-perovskite interface, causing significant in situ resistance which can reduce fill factor considerably.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Giampaolo Pitruzzello, Christoph G. Baumann, Steven Johnson, Thomas F. Krauss
Summary: This study demonstrates that using changes in single-cell motility as a proxy for antibiotic susceptibility effectively detects heteroresistance in bacterial populations. The method allows for the quantification of minimum inhibitory concentration (MIC) using a high-throughput, single-cell motility assay. These findings underscore the importance of characterizing bacterial heterogeneity and highlight the value of single-cell bacterial motility in assessing antibiotic susceptibility and population-wide heteroresistance.
