A5042564747- Orbital Angular Momentum in Optics
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Quantum optics and atomic interactions
- Plasmonic and Surface Plasmon Research
- Mechanical and Optical Resonators
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Optical Imaging Technologies
- Nonlinear Photonic Systems
- Particle Detector Development and Performance
- Advanced Fiber Optic Sensors
- Dark Matter and Cosmic Phenomena
- Photonic Crystals and Applications
- Optical Network Technologies
- Radiation Detection and Scintillator Technologies
- Photorefractive and Nonlinear Optics
- Optical Wireless Communication Technologies
- Astrophysics and Cosmic Phenomena
- Advanced Photonic Communication Systems
- Geophysics and Sensor Technology
- Optical Coherence Tomography Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor Lasers and Optical Devices
- Digital Holography and Microscopy
University of Central Florida
2018-2025
Photonics (United States)
2022
Nazarbayev University
2014-2017
Frumkin Institute of Physical Chemistry and Electrochemistry
2016-2017
Space-time wave packets (STWPs) constitute a broad class of pulsed optical fields that are rigidly transported in linear media without diffraction or dispersion, and therefore propagation-invariant the absence nonlinearities waveguiding structures. Such exhibit unique characteristics, such as controllable group velocities free space exotic refractive phenomena. At root these behaviors is fundamental feature underpinning STWPs: their spectra not separable with respect to spatial temporal...
Abstract Spatiotemporal sculpturing of light pulse with ultimately sophisticated structures represents a major goal the everlasting pursue ultra-fast information transmission and processing as well ultra-intense energy concentration extraction. It also holds key to unlock new extraordinary fundamental physical effects. Traditionally, spatiotemporal pulses are always treated spatiotemporally separable wave packet solution Maxwell’s equations. In past decade, however, more generalized forms...
Introducing correlations between the spatial and temporal degrees of freedom a pulsed optical beam (or wave packet) can profoundly alter its propagation in free space. Indeed, appropriate spatio-temporal spectral render packet propagation-invariant: profiles remain unchanged along axis. The locus any such lies at intersection light-cone with tilted hyperplanes. We investigate (2+1)D 'space-time' propagation-invariant light sheets, identify 10 classes categorized according to magnitude sign...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text Murat Yessenov, Basanta Bhaduri, H. Esat Kondakci, and Ayman F. Abouraddy, "Weaving the Rainbow: Space-Time Optical Wave Packets," Optics & Photonics News 30(5), 34-41 (2019) Export BibTex Endnote (RIS) HTML Plain alert Save article
Can an optical pulse traverse a non-dispersive material at the speed of light in vacuum? Because traditional approaches for controlling group velocity manipulate either or structural resonances, absence dispersion altogether appears to exclude such prospect. Here we demonstrate theoretically and experimentally that “space–time” wave packets—pulsed beams which spatial temporal degrees freedom are tightly intertwined—can indeed transparent vacuum. We synthesize packets whose spatio-temporal...
Optical wave packets that are localized in space and time, but nevertheless overcome diffraction travel rigidly free space, a long sought-after field structure with applications ranging from microscopy remote sensing, to nonlinear quantum optics. However, synthesizing such requires introducing non-differentiable angular dispersion high spectral precision two transverse dimensions, capability has eluded optics date. Here, we describe an experimental strategy capable of sculpting the...
Space-time wave packets (STWPs) with correlated spatial and frequency degrees of freedom exhibit time-dependent interference, thereby giving rise to interesting dynamic evolution behaviors. While versatile spatiotemporal phenomena have been demonstrated in freely propagating fields, coupling light into multimode fibers remains a fundamental experimental challenge. Whereas synthesizing STWPs typically relies on continuum plane-wave modes, their multimode-fiber counterparts must be constructed...
Although a plethora of techniques are now available for controlling the group velocity an optical wave packet, there very few options creating accelerating or decelerating packets whose varies controllably along propagation axis. Here we show that "space-time" in which each wavelength is associated with prescribed spatial bandwidth enable realization acceleration and deceleration free space. Endowing field precise spatiotemporal structure leads to group-velocity changes as high ∼c observed...
Light can be confined transversely and delivered axially in a waveguide. However, waveguides are lossy static structures whose modal characteristics fundamentally determined by the boundary conditions, thus cannot readily changed post-fabrication. Here we show that unpatterned planar optical films exploited for low-loss two-dimensional waveguiding using `space-time' wave packets, which unique family of one-dimensional propagation-invariant pulsed beams. We observe `hybrid guided' space-time...
Space-time wave packets are a class of pulsed optical beams that diffraction-free and dispersion-free in free space by virtue introducing tight correlation between the spatial temporal degrees freedom field. Such have been recently synthesized novel configuration makes use light modulator to realize required spatio-temporal correlations. This arrangement combines pulse-modulation beam-shaping assign one frequency each wavelength according prescribed function. Relying on results several...
The group velocity of 'space-time' wave packets - propagation-invariant pulsed beams endowed with tight spatio-temporal spectral correlations can take on arbitrary values in free space. Here we investigate theoretically and experimentally the maximum achievable delay that realistic finite-energy space-time achieve respect to a reference pulse traveling at speed light. We find this is determined solely by uncertainty association between spatial frequencies wavelengths underlying packet...
The propagation distance of a pulsed beam in free space is ultimately limited by diffraction and space-time coupling. "Space-time" (ST) wave packets are beams endowed with tight spatio-temporal spectral correlations that render them propagation-invariant. Here we explore the limits for ST packets. Making use specially designed phase plate inscribed gray-scale lithography having laser-damage threshold ∼0.5 J/cm2, synthesize light sheet width ≈700 μm bandwidth ∼20 nm, confirm ≈70 m.
The Talbot effect, epitomized by periodic revivals of a freely evolving field structure, has been observed with waves diverse physical nature in space and separately time, whereby diffraction underlies the former dispersion latter. To date, combined spatio-temporal effect not realized any wave because are independent phenomena, typically unfolding at incommensurable length scales. Here we report observation an optical 'space-time' lattice structure undergoes after suffering impact both...
Space-time (ST) wave packets are pulsed beams in which the spatial frequencies and wavelengths tightly correlated. Proper design of functional form these correlations results diffraction-free dispersion-free axial propagation; that is, propagation invariance free space. To date, observed distances such ST has been on order a few centimeters. Here we synthesize an packet optical sheet transverse width ∼200 μm spectral bandwidth ∼2 nm, observe its for approximately 6 meters. For packets,...
We introduce the unique class of propagation-invariant surface plasmon polaritons (SPPs) representing pulsed wave packets propagating along unpatterned metal–dielectric interfaces and are localized in all dimensions, with potentially subwavelength transverse spatial widths. The characteristic features such linear diffraction-free, dispersion-free "plasmonic bullets" stem from tight spatiotemporal correlations incorporated into SPP spectral support domain, we thus call them "space-time" SPPs....
We introduce the space-time (ST) vector light sheet. This unique one-dimensional ST wave packet is characterized by classical entanglement (CE), a correlation between at least two non-separable intrinsic degrees-of-freedom (DoFs), which in this case are spatiotemporal DoFs parallel with spatial-polarization DoFs. experimentally confirm that sheet maintains features of uniformly polarized sheet, such as near-diffraction-free propagation and self-healing, while also maintaining polarization...
Because surface plasmon polaritons (SPPs) are waves characterized by one free transverse dimension, the only monochromatic diffraction-free spatial profiles for SPPs cosine and Airy waves. Pulsed SPP wave packets have been recently formulated that propagation-invariant localized in in-plane dimensions virtue of a tight spectral association between their temporal frequencies, which thus dubbed "space-time" (ST) SPPs. spatiotemporal structure unique to ST-SPPs, optimal launching strategy such...
Space-time (ST) wave packets are coherent pulsed beams that propagate diffraction-free and dispersion-free by virtue of tight correlations introduced between their spatial temporal spectral degrees freedom.Less is known the behavior incoherent ST fields maintain spatio-temporal structure wave-packet counterparts while losing all purely or coherence.We show here structuring spectrum an field produces broadband diffraction free.The intensity profile these consist a narrow feature atop constant...
It is typically assumed that the fluctuations associated with a stationary broadband incoherent field propagate in free space at speed of light vacuum c. Here we introduce concept 'coherence group velocity', which -- analogy to velocity coherent pulses peak coherence function. We confirm experimentally incorporating judicious spatio-temporal spectral structure into allows tuning its space. Utilizing from super-luminescent diode, interferometrically measure delay encountered by...
A freely propagating optical field having a periodic transverse spatial profile undergoes axial revivals---a well-known phenomenon known as the Talbot effect or self-imaging. We show here that introducing tight spatiotemporal spectral correlations into an ultrafast pulsed with eliminates all dynamics in physical space, while revealing novel veiled can be observed only when carrying out time-resolved measurements. Indeed, ``time diffraction'' is observed, whereupon temporal of envelope at...
Introducing angular dispersion into a pulsed field tilts the pulse front with respect to phase front. There exists between and pulse-front tilt universal relationship that is device-independent, also independent of shape bandwidth. We show here this violated by propagation-invariant space-time (ST) wave packets, which are beams endowed precise spatio-temporal structure corresponding particular form dispersion. demonstrate theoretically experimentally underlying ST packets -- best our...
Spatial structuring of an optical pulse can lead in some cases upon free propagation to changes its temporal profile. For example, introducing conventional angular dispersion into the field results encountering group-velocity space. However, only limited control is accessible via this strategy. Here, we show that precise and versatile be exercised space over profile so-called "space–time" wave packets: a class pulsed beams undergirded by nondifferentiable dispersion. This abstract...
Space-time wave packets (STWPs) are propagation-invariant pulsed beams whose characteristics stem from the tight association between their spatial and temporal degrees of freedom. Until recently, only scalar STWPs have been synthesized in form light sheets. Here we synthesize vector that localized all dimensions by preparing polarization-structured spatiotemporal spectra unveil polarization distribution over STWP volume via time-resolved complex field measurements. Such endowed with...
Surface plasmon polaritons (SPPs) are surface-bound waves at metal-dielectric interfaces that exhibit strong out-of-plane field confinement, a key feature for applications is nano-scale sensing and imaging. However, this advantage offset by diffractive spreading during in-plane propagation, leading to transverse spatial delocalization. Conventional strategies combat diffraction through structuring not applicable dimensionally restricted SPPs -- except cosine plasmons localized or Airy...