Article
Biophysics
Benjamin S. Miller, Michael R. Thomas, Matthew Banner, Jeongyun Kim, Yiyun Chen, Qingshan Wei, Derek K. Tseng, Zoltan S. Goeroecs, Aydogan M. Ozcan, Molly M. A. Stevens, Rachel A. McKendry
Summary: By developing optical methods, the sensitivity of absorption-based lateral flow tests has been improved without modifying existing assays. Five different lock-in and subtraction-based methods were compared, and a 2.0-5.4-fold improvement was achieved by exploiting the plasmonic peak of gold nanoparticles for background removal. Furthermore, the sensitivity was further improved by designing composite nanoparticles, resulting in a 58-fold improvement.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Ayato Iba, Makoto Ikeda, Valynn Katrine Mag-usara, Verdad C. Agulto, Makoto Nakajima
Summary: This paper presents a metamaterial-based super-oscillatory lens capable of generating sub-wavelength focal points at sub-THz frequencies, which is highly effective for industrial inspection applications utilizing terahertz waves.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Analytical
Srijan Datta, Saptarshi Mukherjee, Xiaodong Shi, Mahmood Haq, Yiming Deng, Lalita Udpa, Edward Rothwell
Summary: This paper introduces the design and application of a metamaterial lens in microwave imaging and nondestructive evaluation. Experimental results demonstrate that the metamaterial lens combined with a microwave system can achieve high sensitivity detection of subwavelength defects.
Article
Chemistry, Analytical
Marco Boccaccio, Pasquale Rachiglia, Gian Piero Malfense Fierro, Giovanni Pio Pucillo, Michele Meo
Summary: This study presents a design of a holey-structured metamaterial lens to improve acousto-ultrasonic imaging using air-coupled transducers, leading to enhanced sensitivity and resolution in damage imaging.
Article
Nanoscience & Nanotechnology
Sandeep S. R. Kumar, V. K. Krishnadas, Krishnan Balasubramaniam, Prabhu Rajagopal
Summary: A novel technique using a waveguide metamaterial rod as a mechanical acoustic filter has been proposed to suppress higher harmonic components in the measured signal, showing potential for early stage damage detection.
Article
Optics
Pengfei Shi, Xiaodong Li, Hongge Zhao, Youfu Tang, Jingwei Zhu, Renjing Gao, Shutian Liu
Summary: A realization form of the Mie resonance with adjustable characteristics based on a water-based metamaterial is proposed. The novel local electromagnetic field coupling mechanism is established for transmission enhancement through the sub-wavelength aperture. The design of a water-based metamaterial particle allows adjustable transmission enhancement characteristics through microfluidic control.
Article
Optics
Hatef Shiran, Guowu Zhang, Odile Liboiron-Ladouceur
Summary: In this paper, a compact dual-mode multimode interferometer optical power splitter based on subwavelength grating structures is designed and characterized. The optimized splitter is three times more compact than conventional MMIs, with low loss and crosstalk over a wide bandwidth. Experimental results show low excess loss and crosstalk levels for both TE0 and TE1 modes.
Article
Instruments & Instrumentation
Teng Yang, Yuqi Jin, Tae-Youl Choi, Narendra Dahotre, Arup Neogi
Summary: This study presents a novel acoustic doublet meta-material lens that demonstrates far-field sound wave focusing and ultra-long collimation characteristics. The lens has super-resolution detection capabilities and can enable ultrasonic diagnostics deep within materials or biological tissues. It shows the potential of applying acoustic metamaterial elements in practical imaging applications.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Acoustics
Lorenzo Astolfi, David A. Hutchins, Peter J. Thomas, Richard L. Watson, Luzhen Nie, Steven Freear, Adam T. Clare, Marco Ricci, Stefano Laureti
Summary: Experiments and finite element simulations demonstrate the ability of metamaterials to achieve sub-wavelength ultrasonic imaging of an aperture in water immersion across a broad bandwidth. The use of tungsten in holey-structured metamaterials creates a significant acoustic impedance mismatch with water, enabling the broadband metamaterial behavior.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Optics
Yesenia A. Garcia-Jomaso, Dahi L. Hernandez-Roa, Jesus Garduno-Mejia, Carlos G. Trevino-Palacios, Oleg Kolokoltsev, Naser Qureshi
Summary: This study presents a sub-wavelength terahertz imaging system that combines solid immersion microscopy and interferometric detection, achieving resolution beyond the diffraction limit at 703 GHz. Experimental results show that sub-wavelength spatial resolution can be achieved using a relatively low-cost pyroelectric detector with both high and low contrast samples. The system has potential for various applications in imaging and microscopy.
Article
Chemistry, Multidisciplinary
Xianghui Liu, Pan Wang, Chengyu Xiao, Liucheng Fu, Han Zhou, Tongxiang Fan, Di Zhang
Summary: This research proposes a bioinspired bilevel metamaterial for multispectral manipulation, providing a valuable way to effectively design multifunctional metamaterials inspired by nature.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Shreeya H. Rane, Ajinkya S. Punjal, Shriganesh S. S. Prabhu, Dibakar Roy Chowdhury
Summary: Although the experimental detection of evanescent orders is challenging, Fourier transformed terahertz spectroscopy (FTTS) through near-field scanning terahertz microscopy (NSTM) can overcome the limitations and successfully detect the non-propagating evanescent orders originating from a 1-dimensional dielectric grating. The identification of evanescent orders demonstrates the potential of FTTS in exploring near-field systems and paves the way for studying other near-field phenomena in terahertz photonic systems.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Physical
Reinoud F. Wolffenbuttel, M. Amir Ghaderi
Summary: Metasurface coatings on a free-standing SiN thin film membrane are fabricated on a Si substrate using masked lithography and CMOS-compatible surface micromachining. The regular pattern of sub-wavelength unit cells of 2.6 μm side length, which defines the metasurface, is interrupted by an equally regular array of sub-wavelength holes for sacrificial release of the membrane. Simulation results show that the effect of the hole array can be disregarded if the hole-to-hole pitch is larger than 6 times the side length of the metasurface unit cell, and the diameter of the hole should remain smaller than about 1.5 μm, with proper alignment.
Article
Optics
Mohd Saif Shaikh, Shuyu Wen, Mircea -Traian Catuneanu, Mao Wang, Artur Erbe, Slawomir Prucnal, Lars Rebohle, Shengqiang Zhou, Kambiz Jamshidi, Manfred Helm, Yonder Berencen
Summary: This study demonstrates the first experimental success of room-temperature silicon PIN photodiodes hyperdoped with tellurium, operating in the optical telecom bands. The hyperdoped silicon material shows a strong room-temperature photoresponse in the short-wavelength infrared region due to the creation of an impurity band within the silicon band gap. The detailed description of the fabrication process, working principle, and performance, including key figures of merits, are provided.
Article
Multidisciplinary Sciences
Marcelo Saito Nogueira, Siddra Maryam, Michael Amissah, Huihui Lu, Noel Lynch, Shane Killeen, Micheal O'Riordain, Stefan Andersson-Engels
Summary: Colorectal cancer is the third most common type of cancer worldwide, with recent research focusing on non-invasive detection techniques. By using DRS and SVM models, high diagnostic accuracy can be achieved for both superficial and deeper tissue layers.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Industrial
Yuqi Jin, Tianhao Wang, Arkadii Krokhin, Tae-Youl Choi, Rajiv S. Mishra, Arup Neogi
Summary: The use of dissimilar material joints or multilayered metals is increasing in the manufacturing industry to meet the demand for multifunctional materials. Understanding the mechanical, thermal, or electrical properties of these materials requires investigating lattice mismatch and utilizing techniques like nanoindentation and elastographic mapping. Friction stir welding is an effective method for obtaining dissimilar joints between different metals, and dynamic bulk modulus elastographic mapping provides a non-invasive technique for inspecting bulk metallurgic elastic modulus.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Acoustics
Yuqi Jin, Ezekiel Walker, Tae-Youl Choi, Arup Neogi, Arkadii Krokhin
Summary: The study demonstrates various metamaterial effects using a square lattice phononic crystal (PnC), including positive and negative refraction and reflection. By shifting the equifrequency contour (EFC) away from the center of the Brillouin zone, an effectively inverted EFC is achieved, leading to multi-refringence phenomena. Additionally, strong right-angle redirection and collimation of the incident acoustic beam are achieved through the coupling of different modes. These effects are validated through numerical simulations and experiments.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Physics, Applied
Yuqi Jin, Teng Yang, Tae-Youl Choi, Narendra B. Dahotre, Arup Neogi, Arkadii Krokhin
Summary: In this paper, a 3D printed acoustic shear wave polarization rotator based on the fused-deposition-modeling printing process is designed and characterized. The rotation of the polarization axis is achieved through the gradual change in orientation of the axis of anisotropy along the direction of wave propagation of a printed layered structure. The performance of the rotator can be improved by adjusting the number of printed layers and the infill fraction settings.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Yuba Poudel, Sairaman Seetharaman, Swastik Kar, Francis D'Souza, Arup Neogi
Summary: The effect of localized plasmon on the photoemission and absorption in the MoS2-GaN hybrid heterostructure was studied. The resonant coupling of localized plasmons induced by platinum and gold nanoparticles enhanced the UV emission and absorption efficiency in the semiconductor system. Selective optical excitation of specific resonances can tune the absorption and emission properties of this layered 2D-3D semiconductor material system.
Article
Chemistry, Multidisciplinary
Teng Yang, Yuqi Jin, Arup Neogi
Summary: The development of ultrasonic imaging techniques is optimized using artificial tissue phantoms before practical applications. Accumulated fatty tissues can have a significant impact on the resolution and feasibility of ultrasonic imaging. Different methods for characterizing acoustic properties on fatty phantoms exist, but some overestimate attenuation coefficients. This study compares two major attenuation measurement configurations using numerical simulations and highlights the importance of pulse dispersion in viscoelastic tissue phantoms.
Article
Materials Science, Paper & Wood
Sheldon Q. Shi, Zhiying Cui, Yuqi Jin, Lee Smith, H. Felix Wu, Arup Neogi
Summary: Fiberboards were made from scrap denim with two different resins, melamine urea formaldehyde (MUF) and polymeric methylene diphenyl diisocyanate (pMDI). The resin content and MUF-pMDI weight ratio were investigated. Physical and mechanical tests were conducted to determine various properties. The study showed that resin content and MUF-pMDI ratio affected the properties, and increasing pMDI portion improved thickness swell and water absorption.
Article
Physics, Multidisciplinary
Yuqi Jin, Teng Yang, Narendra B. Dahotre, Arup Neogi
Summary: The functionality of thermally active phononic crystals and metamaterials can be enhanced by utilizing the temperature-dependent physical characteristics of heat-sensitive materials. The phase transformation between water and ice can significantly change the acoustic transmission in an aqueous medium due to the modification of the elastic properties of periodic phononic structures. A phononic crystal with acrylic scatterers in water can function as an acoustic filter, beam splitter, or lensing based on the device's temperature. The transition from room temperature to freezing point switches off the metamaterial properties of the water-based PnC, resulting in changes in equi-frequency contours and wave propagation characteristics.
Article
Engineering, Manufacturing
Yuqi Jin, Teng Yang, Tianhao Wang, Shelden Dowden, Arup Neogi, Narendra B. Dahotre
Summary: Additive friction stir deposition (AFSD) is a solid-state additive manufacturing technology that allows the production of customized products on a large scale. Through the use of ultrasonic dynamic-elasticity mapping, the spatial distribution of physical properties in AFSD 6061 Al was analyzed. Experimental and numerical studies showed that mechanical and thermo-mechanical residual stresses can generate constructive or destructive interference, resulting in spatially variable dynamic bulk modulus in multi-layer AFSD fabrications.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Yuqi Jin, Teng Yang, Narendra B. Dahotre, Arup Neogi, Tianhao Wang
Summary: This study proposes a design of defect-free sound insulator made by single alloys with multiple friction stir processes. Experimental and numerical simulation results show that friction stir processing can introduce clear acoustic-elastic property contrast and transmission gap frequencies on an aluminum plate. Disorder offsets on FSP periodicity further enhance sound insulation. The best performance in the models achieves -30 dB sound insulation in a 350 mm-long aluminum alloy plate with 14 parallel FSPs.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Physics, Applied
Yuqi Jin, Teng Yang, Menglin Yao, Zhiming Wang, Narendra B. Dahotre, Arup Neogi
Summary: A non-contacting ultrasound-based porosity fraction mapping methodology is developed for estimated small voids in coal using the effective medium approximation. This novel ultrasonic technique based on the mechanical properties of coal offers a rapid scan of the effective density mapping and distribution of void fraction over a large sample area, overcoming the limitation of small voids detection in the conventional ultrasound testing.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Automation & Control Systems
Yuqi Jin, Xinyue Wang, Edward A. Fox, Zhiwu Xie, Arup Neogi, Rajiv S. Mishra, Tianhao Wang
Summary: A novel monitoring method using ultrasound signals and machine learning technique was reported to monitor the wear condition of friction stir welding and processing tools. An AI algorithm was trained to identify small variations in the tool conditions and accurately predict the worn amount on the tool pins.
ADVANCED INTELLIGENT SYSTEMS
(2022)