A5026982573- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Neuroscience and Neural Engineering
- Neural Networks and Reservoir Computing
- Advanced Sensor and Energy Harvesting Materials
- EEG and Brain-Computer Interfaces
- Acoustic Wave Resonator Technologies
- Photonic Crystals and Applications
- Photonic Crystal and Fiber Optics
- Radio Frequency Integrated Circuit Design
- Metamaterials and Metasurfaces Applications
- Muscle activation and electromyography studies
- Near-Field Optical Microscopy
- Quantum and electron transport phenomena
- Advanced Optical Sensing Technologies
- Advanced Fluorescence Microscopy Techniques
- Semiconductor materials and devices
- Electrical Contact Performance and Analysis
- Wireless Body Area Networks
- Diamond and Carbon-based Materials Research
- Magnetic Bearings and Levitation Dynamics
- Magnetic Field Sensors Techniques
University of Pennsylvania
2015-2025
California University of Pennsylvania
2021-2025
Philadelphia University
2020
California Institute of Technology
2012-2017
University of Southern California
2007-2012
Southern California University for Professional Studies
2007-2009
The use of optical interconnects has burgeoned as a promising technology that can address the limits data transfer for future high-performance silicon chips. Recent pushes to enhance communication have focused on developing wavelength-division multiplexing technology, and new dimensions will be paramount fulfill ever-growing need speed. Here we demonstrate an integrated multi-dimensional scheme combines wavelength- mode- photonic circuit. Using foundry-compatible inverse design spectrally...
Low-power integrated projection technology can play a key role in development of low-cost mobile devices with built-in high-resolution projectors. Low-cost 3D imaging and holography systems are also among applications such technology. In this paper, an system based on two-dimensional optical phased array fast beam steering capability is reported. Forward biased p-i-n phase modulators 200MHz bandwidth used per each element for rapid control. An optimization algorithm implemented to compensate...
An integrated silicon nanophotonic coherent imager (NCI), with a 4 × array of pixels is reported. In the proposed NCI, on-chip optical processing determines intensity and depth each point on imaged object based instantaneous phase amplitude wave incident pixel. The NCI operates modified time-domain frequency modulated continuous (FMCW) ranging scheme, where concurrent measurements both period zero-crossing time electrical output chip allows to overcome traditional resolution limits domain...
Two-dimensional (2-D) integrated optical phased arrays (OPA) have many applications from imaging to LiDAR. Conventionally, 2-D beam-steering in an N × OPA requires N2 phase shifters placed within the array aperture, resulting a high per-element power consumption while limiting minimum achievable element-to-element spacing. In this paper, we report architecture, where for OPA, only 2N outside of aperture are used, which significantly reduces total and eliminates electrical routing aperture....
Abstract A single tunable filter simplifies complexity, reduces insertion loss, and minimizes size compared to frequency switchable banks commonly used for radio (RF) band selection. Magnetostatic wave (MSW) filters stand out their wide, continuous tuning high-quality factor. However, MSW employing electromagnets consume excessive power space, unsuitable consumer wireless applications. Here, we demonstrate miniature high selectivity with zero static consumption, occupying less than 2 cc. The...
Abstract Low noise stable lasers have far-reaching applications in spectroscopy, communication, metrology and basic science. The Pound−Drever−Hall laser stabilization technique is widely used to stabilize different types of these areas. Here we report the demonstration an integrated system that can a low-cost realize compact inexpensive light source, which ultimately impact many fields science engineering. We present architecture utilizing electronically reconfigurable Mach−Zehnder...
Abstract As quantum networks expand and are deployed outside research laboratories, a need arises to design integrate compact control electronics for each memory node. It is essential understand the performance requirements such systems, especially concerning tolerable levels of noise, since these specifications dramatically affect system's complexity cost. Here, using an approach that can be easily generalized across quantum‐hardware platforms, case study based on nitrogen‐vacancy (NV)...
Metasurfaces can manipulate the amplitude and phase of electromagnetic waves, offering applications from antenna design cloaking to imaging communication. Temporal non-linear metasurfaces also adjust frequency impinging advancing conversion, sensing, quantum systems. Here, we demonstrate a active electronic-photonic metasurface that transfers information an optical wave millimeter-wave beam. The proof-of-concept is designed radiate steerable 28 GHz beam when illuminated with at 193 THz...
Nanotechnology has become a groundbreaking advancement in modern science, significantly impacting the fields of medicine and electronics. By manipulating materials at nanoscale (1–100 nm), researchers have developed innovative solutions that enhance precision, efficiency, functionality various applications. In medicine, nanoparticles are used for targeted drug delivery, reducing side effects improving therapeutic outcomes. Nanorobots being minimally invasive surgeries precise diagnostics....
Millimeter-wave (mm-wave) phased arrays can realize multi-Gb/s communication links but face challenges such as signal distribution and higher power consumption hindering their widespread deployment. Hybrid photonic mm-wave solutions combined with fiber-optics address some of these bottlenecks. Here, we report an integrated photonic-assisted array transmitter applicable for low-power, compact radio heads in fiber to fronthaul links. The utilizes optical heterodyning within electronically...
The detection and analysis of rare cells in complex media such as blood is increasingly important biomedical research clinical diagnostics. Micro-Hall detectors (μHD) for magnetic have previously demonstrated ultrahigh sensitivity to cells. This originates from the minimal background blood, obviating cumbersome detrimental sample preparation. However, translation this technology applications has been limited by inherently low throughput (<1 mL/h), susceptibility clogging, incompatibility...
Abstract The sense of touch is critical to dexterous use the hands and thus an essential component efforts restore hand function after amputation or paralysis. Prosthetic systems have addressed this goal with wearable tactile sensors. However, such sensors are suboptimal for neuroprosthetic designed reanimate a patient’s own paralyzed hand. Here, we developed implantable sensing system intended subdermal placement. composed microfabricated capacitive pressure sensor, custom integrated...
A wideband laser phase noise reduction scheme is introduced where the optical field of a single sideband modulated with an electrical signal containing discriminated laser. The proof-of-concept experiments on commercially available 1549 nm distributed feedback show linewidth from 7.5 MHz to 1.8 kHz without using large cavity resonators. This feed-forward performs cancellation independent light source and, as such, it compatible original tunability requiring tunable components. By placing...
Coherent beam combining (CBC) technology holds the promise of enabling laser systems with very high power and near-ideal quality. We propose demonstrate a novel servo system composed multilevel optical phase lock loops. This is based on entirely electronic components consequently can be considerably more compact less expensive compared to made phase/frequency shifters. have also characterized noise 1064 nm Yb-doped fiber amplifier determine its effect CBC studied theoretically efficiency...
Implantable brain machine interfaces for treatment of neurological disorders require on-chip, real-time signal processing action potentials (spikes). In this work, we present the first spike sorting SoC with integrated neural recording front-end and analog unsupervised classifier. The event-driven, low power sorter features a novel hardware-optimized, K-means based algorithm that effectively eliminates duplicate clusters is implemented using clockless ADC-less architecture. 1.4 <b...
The first unambiguous linewidth measurements are reported for fiber-pigtailed high-power distributed feedback (DFB) semiconductor lasers operating near 2.05 μm wavelength range. DFB packaged inside standard 14-pin butterfly package with polarization- maintaining output fiber and an integrated optical isolator. Schawlow-Townes was measured using the coherent frequency-discriminator technique a Mach-Zehnder interferometer total characterized heterodyne setup. Our indicate less than 100 KHz of...
Electrical frequency synthesizers have been in existence for several decades and are an integral part of almost every communication sensing system. In the optical domain, however, despite promising bench-top demonstration synthesizers, large size, high-power consumption, high-cost significantly limited their deployment compared to electrical counterparts. Here we report integrated electro-optical phase locked loop (EOPLL) as core synthesizer where photonic electronic devices a standard...
Significance Our sensory experience is governed by sensor properties (e.g., eye photoreceptors) and corresponding motor strategies to sample the environment movements). With injury, aging, or new task constraints, existing can become incompatible with perceptual demands. Using a brain–machine interface paradigm in rats, we studied how are adapted inputs accomplish difficult searching task. We show that be dynamically regulated through optimally extract task-relevant information.
Direct frequency locking of lasers to RF oscillators has many applications such as high resolution optical synthesis, coherent communication, spectroscopy, sensing, and imaging. Here we present a hybrid-integrated opto-electronic loop that directly locks semiconductor laser an synthesized source using oscillator with dispersive delay line. Cascaded ring filters, operating near the resonance frequency, provide enhanced chromatic dispersion compact footprint. The electronic chip is integrated...