A5067237499- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Advanced MEMS and NEMS Technologies
- Acoustic Wave Resonator Technologies
- Force Microscopy Techniques and Applications
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Acoustic Wave Phenomena Research
- Nonlinear Photonic Systems
- Advanced Materials and Mechanics
- Neuroscience and Neural Engineering
- Modular Robots and Swarm Intelligence
- 3D Printing in Biomedical Research
- Advanced Sensor and Energy Harvesting Materials
- Electrostatic Discharge in Electronics
- Microfluidic and Capillary Electrophoresis Applications
- Electromagnetic Fields and Biological Effects
- Laser-Matter Interactions and Applications
- Micro and Nano Robotics
- Advanced Chemical Sensor Technologies
- Microfluidic and Bio-sensing Technologies
- Advanced DC-DC Converters
- Ultrasound and Hyperthermia Applications
- Biosensors and Analytical Detection
- Wireless Body Area Networks
Synergy University Dubai
2013-2024
Birla Institute of Technology and Science, Pilani - Dubai Campus
2013-2024
Ahmedabad University
2024
Xi'an Jiaotong University
2021
University of Cambridge
2016-2019
National Institute of Standards and Technology
2019
Dr. M.G.R. Educational and Research Institute
2016
Harvard University
2014-2015
University of Waterloo
2015
Brigham and Women's Hospital
2014
This paper is motivated by the recent demonstration of three-wave mixing based phononic frequency comb. While previous experiments have shown existence pathway in a system two-coupled phonon modes, this work demonstrates similar three-coupled modes. The also presents number interesting experimental facts concomitant to three-mode comb observed specific micromechanical device. validation along with two-mode points ultimate possibility multimode combs.
A liquid surface established by standing waves is used as a dynamically reconfigurable template to assemble microscale materials into ordered, symmetric structures in scalable and parallel manner. The broad applicability of this technology illustrated assembling diverse from soft matter, rigid bodies, individual cells, cell spheroids cell-seeded microcarrier beads. As service our authors readers, journal provides supporting information supplied the authors. Such are peer reviewed may be...
An 8-MHz seventh-degree elliptic-function low-pass filter is described, demonstrating an approach to low-distortion antialias filtering for high-definition video applications. The filter's performance goals are achieved through the use of circuit design principles that capitalize on strengths BiCMOS technology. integrator circuits composing consist a new wideband transconductor and unique Miller-stage circuit. Integrator time constants determined by stable RC products, enabling simplified...
This paper is motivated by the recent demonstration of a phononic frequency comb. While previous experiments have shown existence three-wave mixing pathway in system two-coupled phonon modes, this work demonstrates similar three-coupled modes. also presents number interesting experimental facts concomitant to three-mode parametric resonance based comb observed specific micromechanical device. The validation combs via along with two-mode points ultimate possibility multimode combs.
In this letter, we propose a flexible microwave antenna applicator to induce mild hyperthermia that can be used in conjunction with chemotherapy. The antennas were designed and tested using vitro gels mimic the electrical properties of human breast skin, fat, fibroglandular, muscle tissues. Experiments show provide up 3 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">°</sup> C temperature increase within successfully achieve hyperthermia....
This paper builds on the recent demonstration of three-wave mixing based phononic frequency comb. Here, in this process, an intrinsic coupling between drive and resonant leads to a comb spacing corresponding separation frequency. In paper, through with other identical devices, we demonstrate emergence two different regimes using single tone external signal. Several interesting features for coupled combs are identified, including following: (1) component controlled by frequencies, each...
Abstract Micro and nanomechanical resonators have been extensively researched in recent decades for applications to time frequency references, as well highly sensitive sensors. Conventionally, the operation of these resonant sensors is implemented using a feedback oscillator dynamically track variations frequency. However, this approach places limitations on stability output response, particularly owing near-carrier noise shaping, limiting measurement stabilities at short-to-moderate...
We present systematic experimental observations of three-mode auto-parametric instability in a micromechanical resonator analogous to previous this effect optical parametric resonators. The is triggered when driven mode at frequency ωd couples two lower modes (frequencies ω1 and ω2) such that = + ω2. Similar the 2 instability, phenomenon seen be threshold dependent sensitive driving conditions system parameters. In support observations, dynamical model has also been specified.
This work builds upon the recent demonstration of a phononic four-wave mixing (FWM) pathway mediated by parametric resonance. In such process, drive tones f_d1 and f_d2 associated with specific phonon mode interact that one also parametrically excites second at sub-harmonic frequency interactions result in comb f_d1/2 +/- n(f_d1-f_d2 ). However, behaviour case where both can independently excite has not been studied or previously described. While it may be possible to expect merger two combs...
This paper builds on the recent demonstrations of two-mode three-wave mixing and three-mode four-wave pathways. In these individual mechanisms, drive resonant frequencies intrinsically couple to generate frequency combs with spacing defined by separation between frequencies. Such resulting from N-mode N+1-wave processes possess spectral characteristics which are strikingly different those nominal parametric resonances. Now, in this paper, we experimentally show possibility simultaneously...
Optical frequency combs have revolutionized the fields of time metrology, synthesis and optical spectroscopy. Recently, we experimentally demonstrated feasibility its phononic analogue in a micromechanical resonator. The underlying nonlinear process for this generation was via parametric three-wave mixing. Now, paper, utilizing three nominally identical copies device, show emergence distinct regimes viz. `Two-mode comb'; non-phononic `Three-mode comb'.
Coagulation is a complex enzymatic polymerisation cascade. Disordered coagulation common in medicine and may be life-threatening yet clinical assays are typically bulky and/or provide an incomplete picture of clot mechanical evolution. We present the adaptation in-plane acoustic wave device: quartz crystal microbalance with dissipation at multiple harmonics to determine time-evolution mesoscale properties formation vitro. This approach sensitive changes surface bulk structure various models...
We demonstrate autoparametric excitation of two distinct sub-harmonic mechanical modes by the same driven mode corresponding to different drive frequencies within its resonance dispersion band. This experimental observation is used motivate a more general physical picture wherein multiple could be excited primary device as long frequency spacing between less than half bandwidth mode. The both seen threshold-dependent and parametric back-action observed impacting on response Motivated this...
Over the past two decades, MEMS resonators have received considerable attention for physical, chemical and biological sensing applications. Typically, operation of resonant sensors relies on tracking a resonance frequency using feedback oscillator. The sensitivity these is limited by physical parametric variations, as in Young's modulus, noise oscillator circuit, such that improvement can require significant effort design, fabrication, ovenization, control resonator. In this paper, we...
We present the first experimental observations of phononic four-wave mixing (FWM) in a piezoelectrically actuated free-free beam microstructure. The FWM response is facilitated by intrinsic coupling between driven mode and an auto-parametrically excited sub-harmonic mode. Motivated results, dynamical model for has been specified.
ART guidelines of World Health Organization recommend a series tests for HIV diagnostics (HIV antibody test, CD4 cell count and viral load count). There are several modern technologies that available to ensure reliable diagnosis employing various principles. However, there is need point-of-care system will eliminate the requirement patient visit hospital initial diagnosis. In this paper, novel design analysis MEMS based microfluidic chip facilitating presented. The on T <sup...
This paper presents a mathematical model for better understanding of the functionality newly‐proposed Malignant Hyperthermia (MH) diagnosis device. MH is rare life‐threatening condition that usually triggered by exposure to certain drugs such as volatile anesthetic agent, neuromuscular blocking or succinylcholine. It highly recommended have this diagnosed immediately after its common symptoms appear. However, it often only when patient has had severe fatal reaction finally made. Due this,...
<title>Abstract</title> Optical frequency combs have received increasing attention, thanks to their fundamental importance in optical computing, communication, sensing and metrology. Recently, thermal phonon counterparts of shown ~10<sup>2</sup> comb teeth ~10<sup>3</sup> spacing, limited the high-frequency range over 100 kHz. In contrast, we report first truly coherent acoustic (AFC), with simultaneous giant enhancements number reaching record 10^4, covering six orders magnitude frequency;...
<title>Abstract</title> Phononic frequency combs (PFC) hold promise for bringing the utility of celebrated optical into domain phonons. The interactions multiple phonon modes in a nonlinear medium result generation PFC. Previous work established existence conditions PFC two-modal via quadratic nonlinearity. However, real situations, higher-order nonlinearities could also play role comb generation. To this end, derives analytical expressions to quantify effects high-order on and their...
The mechanical analog of optical frequency combs, phononic combs (PFCs), has recently been demonstrated in resonators via nonlinear coupling among multiple phonon modes. However, for exciting molecules, the requisite strong couplings need not be readily present. To overcome this limitation, paper introduces an alternative route generation polar molecules. Theoretically, we investigated radiation and spectra generated from CO molecule possessing relatively large permanent dipole moment with...