The Experts below are selected from a list of 52263 Experts worldwide ranked by ideXlab platform
Ayman F. Abouraddy - One of the best experts on this subject based on the ideXlab platform.
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Space-Time Wave Packets Wave-Guided in an Unpatterned Thin Film
2020 Conference on Lasers and Electro-Optics (CLEO), 2020Co-Authors: Abbas Shiri, Murat Yessenov, Scott Webster, Kenneth L. Schepler, Ayman F. AbouraddyAbstract:We demonstrate that propagation-invariant ‘space-time’ Wave Packets can be guided in two dimensions in an unpatterned thin optical film by relying on index-guiding in one dimension and on space-time confinement in the other.
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broadband space time Wave Packets propagating 70 m
Optics Letters, 2019Co-Authors: Basanta Bhaduri, Murat Yessenov, Danielle Reyes, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Jessica Pena, Ayman F. AbouraddyAbstract: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 pulsed beams endowed with tight spatio-temporal spectral correlations that render them propagation-invariant. Here we explore the limits of the propagation distance for ST Wave Packets. Making use of a specially designed phase plate inscribed by gray-scale lithography and having a laser-damage threshold of ∼0.5 J/cm2, we synthesize a ST light sheet of width ≈700 μm and bandwidth ∼20 nm, and confirm a propagation distance of ≈70 m.
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synthesizing broadband propagation invariant space time Wave Packets using transmissive phase plates
Optics Express, 2018Co-Authors: Esat H Kondakci, Murat Yessenov, Danielle Reyes, Daniel J Thul, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Ayman F. AbouraddyAbstract:Space-time Wave Packets are a class of pulsed optical beams that are diffraction-free and dispersion-free in free space by virtue of introducing a tight correlation between the spatial and temporal degrees of freedom of the field. Such Wave Packets have been recently synthesized in a novel configuration that makes use of a spatial light modulator to realize the required spatio-temporal correlations. This arrangement combines pulse-modulation and beam-shaping to assign one spatial frequency to each Wavelength according to a prescribed correlation function. Relying on a spatial light modulator results in several limitations by virtue of their pixelation, small area, and low energy-handling capability. Here we demonstrate the synthesis of space-time Wave Packets with one spatial dimension kept uniform – that is, light sheets – using transparent transmissive phase plates produced by a gray-scale lithography process. We confirm the diffraction-free behavior of Wave Packets having a bandwidth of 0.25 nm (filtered from a typical femtosecond Ti:sapphire laser) and 30 nm (a multi-terawatt femtosecond laser). This work paves the way for developing versatile high-energy light bullets for applications in nonlinear optics and laser machining.
Murat Yessenov - One of the best experts on this subject based on the ideXlab platform.
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Space-Time Wave Packets Wave-Guided in an Unpatterned Thin Film
2020 Conference on Lasers and Electro-Optics (CLEO), 2020Co-Authors: Abbas Shiri, Murat Yessenov, Scott Webster, Kenneth L. Schepler, Ayman F. AbouraddyAbstract:We demonstrate that propagation-invariant ‘space-time’ Wave Packets can be guided in two dimensions in an unpatterned thin optical film by relying on index-guiding in one dimension and on space-time confinement in the other.
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broadband space time Wave Packets propagating 70 m
Optics Letters, 2019Co-Authors: Basanta Bhaduri, Murat Yessenov, Danielle Reyes, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Jessica Pena, Ayman F. AbouraddyAbstract: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 pulsed beams endowed with tight spatio-temporal spectral correlations that render them propagation-invariant. Here we explore the limits of the propagation distance for ST Wave Packets. Making use of a specially designed phase plate inscribed by gray-scale lithography and having a laser-damage threshold of ∼0.5 J/cm2, we synthesize a ST light sheet of width ≈700 μm and bandwidth ∼20 nm, and confirm a propagation distance of ≈70 m.
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synthesizing broadband propagation invariant space time Wave Packets using transmissive phase plates
Optics Express, 2018Co-Authors: Esat H Kondakci, Murat Yessenov, Danielle Reyes, Daniel J Thul, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Ayman F. AbouraddyAbstract:Space-time Wave Packets are a class of pulsed optical beams that are diffraction-free and dispersion-free in free space by virtue of introducing a tight correlation between the spatial and temporal degrees of freedom of the field. Such Wave Packets have been recently synthesized in a novel configuration that makes use of a spatial light modulator to realize the required spatio-temporal correlations. This arrangement combines pulse-modulation and beam-shaping to assign one spatial frequency to each Wavelength according to a prescribed correlation function. Relying on a spatial light modulator results in several limitations by virtue of their pixelation, small area, and low energy-handling capability. Here we demonstrate the synthesis of space-time Wave Packets with one spatial dimension kept uniform – that is, light sheets – using transparent transmissive phase plates produced by a gray-scale lithography process. We confirm the diffraction-free behavior of Wave Packets having a bandwidth of 0.25 nm (filtered from a typical femtosecond Ti:sapphire laser) and 30 nm (a multi-terawatt femtosecond laser). This work paves the way for developing versatile high-energy light bullets for applications in nonlinear optics and laser machining.
U Weichmann - One of the best experts on this subject based on the ideXlab platform.
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interferences of ultrashort free electron Wave Packets
Physical Review Letters, 2002Co-Authors: Matthias Wollenhaupt, A Assion, D Liese, Ch Sarpetudoran, Thomas Baumert, Sebastien Zamith, M A Bouchene, Bertrand Girard, A Flettner, U WeichmannAbstract:Interferences of free electron Wave Packets generated by a pair of identical, time-delayed, femtosecond laser pulses which ionize excited atomic potassium have been observed. Two different schemes are investigated: threshold electrons produced by one-photon ionization with parallel laser polarization and above threshold ionization electrons produced by a two-photon transition with crossed laser polarization. Our results show that the temporal coherence of light pulses is transferred to free electron Wave Packets, thus opening the door to a whole variety of exciting experiments.
Monjurul Meem - One of the best experts on this subject based on the ideXlab platform.
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broadband space time Wave Packets propagating 70 m
Optics Letters, 2019Co-Authors: Basanta Bhaduri, Murat Yessenov, Danielle Reyes, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Jessica Pena, Ayman F. AbouraddyAbstract: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 pulsed beams endowed with tight spatio-temporal spectral correlations that render them propagation-invariant. Here we explore the limits of the propagation distance for ST Wave Packets. Making use of a specially designed phase plate inscribed by gray-scale lithography and having a laser-damage threshold of ∼0.5 J/cm2, we synthesize a ST light sheet of width ≈700 μm and bandwidth ∼20 nm, and confirm a propagation distance of ≈70 m.
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synthesizing broadband propagation invariant space time Wave Packets using transmissive phase plates
Optics Express, 2018Co-Authors: Esat H Kondakci, Murat Yessenov, Danielle Reyes, Daniel J Thul, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Ayman F. AbouraddyAbstract:Space-time Wave Packets are a class of pulsed optical beams that are diffraction-free and dispersion-free in free space by virtue of introducing a tight correlation between the spatial and temporal degrees of freedom of the field. Such Wave Packets have been recently synthesized in a novel configuration that makes use of a spatial light modulator to realize the required spatio-temporal correlations. This arrangement combines pulse-modulation and beam-shaping to assign one spatial frequency to each Wavelength according to a prescribed correlation function. Relying on a spatial light modulator results in several limitations by virtue of their pixelation, small area, and low energy-handling capability. Here we demonstrate the synthesis of space-time Wave Packets with one spatial dimension kept uniform – that is, light sheets – using transparent transmissive phase plates produced by a gray-scale lithography process. We confirm the diffraction-free behavior of Wave Packets having a bandwidth of 0.25 nm (filtered from a typical femtosecond Ti:sapphire laser) and 30 nm (a multi-terawatt femtosecond laser). This work paves the way for developing versatile high-energy light bullets for applications in nonlinear optics and laser machining.
Rajesh Menon - One of the best experts on this subject based on the ideXlab platform.
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broadband space time Wave Packets propagating 70 m
Optics Letters, 2019Co-Authors: Basanta Bhaduri, Murat Yessenov, Danielle Reyes, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Jessica Pena, Ayman F. AbouraddyAbstract: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 pulsed beams endowed with tight spatio-temporal spectral correlations that render them propagation-invariant. Here we explore the limits of the propagation distance for ST Wave Packets. Making use of a specially designed phase plate inscribed by gray-scale lithography and having a laser-damage threshold of ∼0.5 J/cm2, we synthesize a ST light sheet of width ≈700 μm and bandwidth ∼20 nm, and confirm a propagation distance of ≈70 m.
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synthesizing broadband propagation invariant space time Wave Packets using transmissive phase plates
Optics Express, 2018Co-Authors: Esat H Kondakci, Murat Yessenov, Danielle Reyes, Daniel J Thul, Shermineh Rostami Fairchild, Monjurul Meem, Rajesh Menon, Martin Richardson, Ayman F. AbouraddyAbstract:Space-time Wave Packets are a class of pulsed optical beams that are diffraction-free and dispersion-free in free space by virtue of introducing a tight correlation between the spatial and temporal degrees of freedom of the field. Such Wave Packets have been recently synthesized in a novel configuration that makes use of a spatial light modulator to realize the required spatio-temporal correlations. This arrangement combines pulse-modulation and beam-shaping to assign one spatial frequency to each Wavelength according to a prescribed correlation function. Relying on a spatial light modulator results in several limitations by virtue of their pixelation, small area, and low energy-handling capability. Here we demonstrate the synthesis of space-time Wave Packets with one spatial dimension kept uniform – that is, light sheets – using transparent transmissive phase plates produced by a gray-scale lithography process. We confirm the diffraction-free behavior of Wave Packets having a bandwidth of 0.25 nm (filtered from a typical femtosecond Ti:sapphire laser) and 30 nm (a multi-terawatt femtosecond laser). This work paves the way for developing versatile high-energy light bullets for applications in nonlinear optics and laser machining.
