A5030157075- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Neural Networks and Reservoir Computing
- Photonic Crystals and Applications
- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Advanced Fiber Optic Sensors
- SARS-CoV-2 and COVID-19 Research
- Phase-change materials and chalcogenides
- 2D Materials and Applications
- Mechanical and Optical Resonators
- Advanced Photonic Communication Systems
- Optical Wireless Communication Technologies
- Advanced Memory and Neural Computing
- Digital literacy in education
- Nanowire Synthesis and Applications
- Technology-Enhanced Education Studies
- Metamaterials and Metasurfaces Applications
- Optical Coherence Tomography Applications
- COVID-19 Clinical Research Studies
- Laser-Matter Interactions and Applications
- MXene and MAX Phase Materials
- Chalcogenide Semiconductor Thin Films
University of Florida
2023-2025
Iranshahr University
2024
George Washington University
2020-2023
The University of Texas at Austin
2017-2022
Austin College
2019-2022
Isfahan University of Medical Sciences
2014-2022
Duquesne University
2022
University of Isfahan
2013
Here we demonstrate a spectrally broadband, gigahertz-fast Mach–Zehnder interferometric modulator exhibiting miniscule <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi mathvariant="normal">V</mml:mi> </mml:mrow> <mml:mi>π</mml:mi> </mml:msub> mathvariant="normal">L</mml:mi> </mml:math> of <mml:mn>95</mml:mn> <mml:mspace width="thickmathspace"/> <mml:mo>⋅</mml:mo> <mml:mtext>µ</mml:mtext>...
Abstract Densely integrated active photonics is key for next generation on-chip networks addressing both footprint and energy budget concerns. However, the weak light-matter interaction in traditional Silicon optoelectronics mandates rather sizable device lengths. The ideal material choice should avail high index modulation while being easily into platforms. Indium tin oxide (ITO) offers such functionalities has shown promising capacity recently. Interestingly, nanometer-thin unity-strong of...
Abstract With the increasing need for large volumes of data processing, transport, and storage, optimizing trade-off between high-speed energy consumption in today’s optoelectronic devices is getting increasingly difficult. Heterogeneous material integration into silicon- nitride-based photonics has showed promise, albeit at expense millimeter-to centimeter-scale footprints. The hunt an electro-optic modulator that combines high speed, efficiency, compactness to support component density...
Graphene, renowned for its exceptional electrical, optical, and mechanical properties, takes center stage in the realm of next-generation electronics. In this paper, we provide a thorough investigation into comprehensive fabrication process graphene field-effect transistors. Recognizing pivotal role quality plays determining device performance, explore many techniques metrological methods to assess ensure superior layers. addition, delve intricate nuances doping examine effects on electronic...
Abstract Vertical-cavity surface-emitting lasers (VCSELs) have emerged as a vital approach for realizing energy-efficient and high-speed optical interconnects in the data centers supercomputers. Indeed, VCSELs are most suitable mass production terms of cost-effectiveness reliability. However, there still key challenges that prevent achieving modulation speeds beyond 30s GHz. Here, we propose novel VCSEL design hexagonal transverse-coupled-cavity adiabatically coupled through central cavity....
Metalenses are emerging as an alternative to digital micromirror devices (DMDs), with the advantages of compactness and flexibility. The exploration metalenses has ignited enthusiasm among optical engineers, positioning them forthcoming frontier in technology. In this paper, we advocate for implementation phase-change material, Sb2Se3, capable providing swift, reversible, non-volatile focusing defocusing within 1550 nm telecom spectrum. lens, equipped a robust ITO microheater, offers...
Advancements in nanophotonics have raised the bar for optoelectronic devices, demanding ultra-compact size, fast speeds, high efficiency, and low energy consumption. Emerging materials hold potential to meet these demands, enabling creation of high-performing devices. We present our latest breakthroughs demonstrate device prototypes made from various materials, pushing boundaries performance.
Abstract Advancements in optical communications have increasingly focused on leveraging spatial-structured beams such as orbital angular momentum (OAM) for high-capacity data transmission. Conventional electronic convolutional neural networks exhibit constraints efficiently demultiplexing OAM signals. Here, we introduce a hybrid optical-electronic network that is capable of completing Fourier optics convolution and realizing intensity-recognition-based multiplexed under variable simulated...
We designed and experimentally demonstrated an on-chip Fourier transform spectrometer on silicon-on-sapphire. The comprises array of twelve Mach–Zehnder interferometers (MZIs) with linearly increasing optical path delays between MZI arms. propagation loss 5.2 dB/cm has been observed for the strip waveguides. retrieval spectrum is inter-band cascade laser centered at 3.3 μm. resolution better than 10 cm−1.
Microresonator Kerr optical frequency combs currently constitute a well-established research area in integrated, nonlinear, and quantum photonics. These systems have found plethora of technological applications, while serving as an excellent platform to investigate fundamental scientific topics such light–matter interactions, pattern formation driven-dissipative systems, or entangled twin-photon generation. We here provide brief overview the topic, highlight some most recent advances,...
BACKGROUND: A growing body of evidence supports the need for health systems to shift towards addressing social determinants (SDoH) as part routine care. However, little is known about state industry in terms procurement and use SDoH data. OBJECTIVES: To assess stakeholders' perceptions experiences collecting utilizing METHODS: prospective, cross-sectional study was conducted using a 24-item electronic survey. The pilot-tested survey distributed diverse convenience sample 94 care stakeholder...
The accelerated advancements in nanophotonic technologies have amplified the requirements for optoelectronic devices. These now encompass need compact design, rapid operation, enhanced efficiency, and reduced power consumption. Meeting these evolving demands necessitates development of innovative material frameworks aligned with emerging technological standards. In this context, we unveil our latest research findings, accentuating exploitation low-dimensional materials to pioneer...
Recent research and development in the mid-infrared (IR) wavelength range (2-20 um) for a variety of applications, such as trace gas monitoring, thermal imaging, free space communications have shown tremendous fascinating progress. MXenes, which mainly refer to two-dimensional (2D) transition-metal carbides, nitrides, carbonitrides, drawn lot interest since their first investigation 2011. MXenes project enormous potential use optoelectronics, photonics, catalysis, energy harvesting fields...
Here we present an innovative free-space optical (FSO) communication system which is capable of training database in real-time and demultiplex multiplexed spatial structured laser beams such as orbital angular momentum (OAM) under varying atmospheric turbulent conditions. The core part our detection heterogeneous convolutional neural network includes 4f using first Fourier convolution layer driven by kilohertz-fast reprogrammable high-resolution digital micromirror devices (DMDs). This...
Here we demonstrate Tungsten Disulfide (WS<sub>2</sub>) integrated silicon nitride photodetector, and experimentally tested the responsivity of 0.32 A/W. The spectroscopic results using PL Raman mapping were used to understand strain effect on excitonic bandgap by studying characteristics like excitons, trions, E<sup>1</sup><sub>2g</sub>, A<sup>1</sup><sub>g</sub> opto-electronic response. We show high potential for flexible sensors spectral resolution sensing.
In this study, we explore the innovative potential of metalenses as a compact and flexible alternative to digital micromirror devices, marking significant advancement in optical engineering. Specifically, highlight use phase change material Sb<sub>2</sub>Se<sub>3</sub> for its ability enable swift, reversible, non-volatile focusing defocusing actions within 1550 nm telecom spectrum. The integration robust ITO microheater into lens design enhances functionality, paving way dynamic meta lenses...
We provide an experimental demonstration of mid-infrared polarization rotators built on a silicon-on-sapphire platform at the wavelength 4.55 μm to enable integration quantum cascade lasers (QCLs) and detectors with slotted photonic crystal waveguide (PCW) gas sensors for on-chip optical spectroscopy applications. The are essential convert preferentially transverse magnetic (TM) polarized light from QCL electric (TE) interface preferential TE-guiding PCW sensors. rotator consists...
We propose and demonstrate a novel design of multi-arm bowtie antenna (MABA) able to provide wideband field enhancement (FE). The FE is looked-for parameter antennas in an integrated electro-optic (EO) communication sensing applications. In the proposed MABA, paralleled arms with different lengths flare angles multiple resonance frequencies. By tailoring these frequencies adequately close each other, wide range high achieved intrinsic limitation conventional (BAs) this regard overcome. MABA...
Abstract Miniaturized, low-cost wavelength detectors are gaining enormous interest as we step into the new age of photonics. Incompatibility with integrated circuits or complex fabrication requirement in most conventionally used filters necessitates development a simple, on-chip platform for easy-to-use detection system. Also, intensity fluctuations hinder precise, noise free spectral information. Here propose novel approach utilizing sensitive photocurrent across semiconductor...
Abstract In atomic multi-level systems, adiabatic elimination (AE) is a method used to minimize complicity of the system by eliminating irrelevant and strongly coupled levels detuning them from one another. Such three-level system, for instance, can be mapped onto physically in form three-waveguide system. Actively coupling strength between respective waveguide modes allows modulating light propagate through device, as proposed here. The outer waveguides act an effective two-photonic-mode...