A5026392936- Orbital Angular Momentum in Optics
- Photonic and Optical Devices
- Neural Networks and Reservoir Computing
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Quantum Information and Cryptography
- Near-Field Optical Microscopy
- Laser-Matter Interactions and Applications
- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Photonic Crystals and Applications
- Advanced Fiber Optic Sensors
- Nonlinear Photonic Systems
- Advanced Optical Sensing Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Random lasers and scattering media
- Mechanical and Optical Resonators
- Quantum, superfluid, helium dynamics
- Advanced Optical Imaging Technologies
- Solar and Space Plasma Dynamics
- Semiconductor Quantum Structures and Devices
- Microfluidic and Bio-sensing Technologies
- Electrohydrodynamics and Fluid Dynamics
- Liquid Crystal Research Advancements
- Terahertz technology and applications
Massachusetts Institute of Technology
2019-2025
Vassar College
2022
University of Ottawa
2013-2020
RTX (United States)
2019-2020
Max Planck - University of Ottawa Centre for Extreme and Quantum Photonics
2016
Quantum key distribution (QKD) promises information-theoretically secure communication, and is already on the verge of commercialization. Thus far, different QKD protocols have been proposed theoretically implemented experimentally [1, 2]. The next step will be to implement high-dimensional in order improve noise resistance increase data rate [3-7]. Hitherto, no experimental verification single-photon regime has conducted outside laboratory. Here, we report realization such a system...
We study the nonlinear optical propagation of two different classes light beams with space-varying polarization-radially symmetric vector and Poincaré lemon star topologies-in a rubidium vapor cell. Unlike Laguerre-Gauss other types that quickly experience instabilities, we observe their is not marked by beam breakup while still exhibiting traits such as confinement self-focusing. Our results suggest that, tailoring spatial structure polarization, effects can be effectively controlled. These...
Abstract Electron waves that carry orbital angular momentum (OAM) are characterized by a quantized and unbounded magnetic dipole moment parallel to their propagation direction. When interacting with materials, the wavefunctions of such electrons inherently modified. Such variations therefore motivate need analyse electron wavefunctions, especially wavefronts, obtain information regarding material’s structure. Here, we propose, design demonstrate performance device based on nanoscale...
The scaling of many photonic quantum information processing systems is ultimately limited by the flux light throughout an integrated circuit. Source brightness and waveguide loss set basic limits on on-chip photon flux. While substantial progress has been made, separately, towards ultra-low chip-scale circuits high single-photon sources, integration these technologies remained elusive. Here, we report a emitter source with wafer-scale, silicon nitride We demonstrate triggered pure emission...
Abstract Controlling large-scale many-body quantum systems at the level of single photons and atomic is a central goal in information science technology. Intensive research development has propelled foundry-based silicon-on-insulator photonic integrated circuits to leading platform for optical control with individual mode programmability. However, integrating single-emitter tunability remains an open challenge. Here, we overcome this barrier through hybrid integration multiple InAs/InP...
Abstract Modern beam shaping techniques have enabled the generation of optical fields displaying a wealth structural features, which include three-dimensional topologies such as Möbius, ribbon strips and knots. However, unlike simpler types structured light, topological properties these hitherto remained more fundamental curiosity opposed to feature that can be applied in modern technologies. Due their robustness against external perturbations, invariants physical systems are increasingly...
A novel fiber-optic refractometer is proposed and demonstrated to achieve temperature- axial strain-compensated refractive index measurement using highly sensitive outer-cladding modes in a tapered bend-insensitive fiber based Mach-Zehnder interferometer. Peak wavelength shifts associated with different spatial frequency peaks are calibrated obtain wavelength-related character matrix (λ)M(RI,T,ε) for simultaneous of multiple environmental variables. phase-related (Φ)M(RI,T,ε) also acquired...
Optical fiber links and networks are integral components within between cities' communication infrastructures. Implementing quantum cryptographic protocols on either existing or new will provide information-theoretical security to data transmissions. However, there is a need for ways increase the channel bandwidth. Using transverse spatial degree of freedom one way transmit more information tolerable error thresholds by extending common qubit high-dimensional key distribution (QKD) schemes....
Converting spin angular momentum to orbital has been shown be a practical and efficient method for generating optical beams carrying possessing space-varying polarized field.Here, we present novel liquid crystal devices tailoring the wavefront of through Pancharatnam-Berry phase concept.We demonstrate versatility these by an extensive range such as ±200 units along with Bessel, Airy Ince-Gauss beams.We characterize both polarization properties generated beams, confirming our devices' performance.
Quantum - or classically correlated light can be employed in various ways to improve resolution and measurement sensitivity. In an "interaction-free" measurement, a single photon used reveal the presence of object placed within one arm interferometer without being absorbed by it. This method has previously been applied imaging. With technique known as "ghost imaging", entangled pairs are for detecting opaque with significantly improved signal-to-noise ratio while preventing...
Electrons have played a significant role in the development of many fields physics during last century. The interest surrounding them mostly involved their wave-like features prescribed by quantum theory. In particular, these correctly predict behaviour electrons various physical systems including atoms, molecules, solid-state materials, and even free space. Ten years ago, new breakthroughs were made, arising from ability to bestow orbital angular momentum (OAM) wave function electrons. This...
The orbital angular momentum (OAM) carried by optical beams is a useful quantity for encoding information. This form of has been incorporated into various works ranging from telecommunications to quantum cryptography, most which require methods that can rapidly process the OAM content beam. Among current state-of-the-art schemes readily acquire this information are so-called sorters, consist devices spatially separate components Such have found numerous applications in communications, field...
A radially polarized beam is axially symmetric and able to produce tightly focused light fields beyond the Gaussian diffraction limit.However, with current technology, its duration limited by relatively narrow bandwidth that generation techniques can support.Using a 10 cycle pulse central wavelength of 1.8 μm, we show beams be compressed few-cycle regime, while still maintaining their nature.Therefore, it seems feasible, using only well-developed methods, reach intensities ∼10 19 W∕cm 2...
Advances in laser technology have driven discoveries atomic, molecular, and optical (AMO) physics emerging applications, from quantum computers with cold atoms or ions, to networks solid-state color centers. This progress is motivating the development of a new generation control systems that can manipulate light field high fidelity at wavelengths relevant for AMO applications. These are characterized by criteria: (C1) operation design wavelength choice visible (VIS) near-infrared (IR)...
Abstract Engineering material properties is key for development of smart materials and next generation nanodevices. This requires nanoscale spatial precision control to fabricate structures/defects. Lithographic techniques are widely used nanostructuring in which a geometric pattern on mask transferred resist by photons or charged particles subsequently engraved the substrate. However, direct mask-less fabrication has only been possible with electron ion beams. That because light an inherent...
Structured electric fields are introduced as a viable means to generate twisted electrons. This paper presents device that is able produce such fields. The authors show their imparts tunable amounts of orbital angular momentum onto an electron beam.
Detecting nonclassical light is a central requirement for photonics-based quantum technologies. Unrivaled high efficiencies and low dark counts have positioned superconducting nanowire single-photon detectors (SNSPDs) as the leading detector technology integrated photonic applications. However, challenge lies in their integration within circuits, regardless of material platform or surface topography. Here, we introduce method based on transfer printing that overcomes these constraints allows...
Free electrons with a helical phase front, referred to as "twisted" electrons, possess an orbital angular momentum (OAM) and, hence, quantized magnetic dipole moment along their propagation direction. This intrinsic can be used probe material properties. Twisted thus have numerous potential applications in materials science. Measuring this quantity often relies on series of projective measurements that subsequently change the OAM carried by electrons. In Letter, we propose nondestructive way...
Strong field laser physics has primarily been concerned with controlling beams in time while keeping their spatial profiles invariant. In the case of high harmonic generation, beam is result coherent superposition atomic dipole emissions. Therefore, fundamental can be tailored space, and characteristics will imparted onto harmonics. Here we produce harmonics using a space-varying polarized beam, which refer to as vector beam. By exploiting natural evolution it propagates, convert into...
The polarization of a monochromatic optical beam lies in plane, and general, is described by an ellipse, known as the ellipse. ellipse tight focusing (non-paraxial) regime forms non-trivial three-dimensional topologies, such M\"obius ribbon strips, well knots. latter formed when dynamics specific states, e.g., circular are studied upon propagation. However, there alternative method to generate knots: electric field's tip can be made evolve along knot trajectory time locally. We propose...