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Thomas Zentgraf

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Dr. Thomas Zentgraf. Die Arbeitsgruppe Ultraschnelle Nanophotonik beschäftigt sich mit der Erforschung der optischen Eigenschaften von künstlich. E-Mail: websbobet.coaf(at)upb(dot)de. Büro: P Web: Homepage. Besucher: Pohlweg Paderborn. Sonderforschungsbereich Transregio Thomas Zentgraf. Steuerberater. Spezialisiert auf die ganzheitliche, steuerrechtliche Beratung von Immobilienbesitzern, Architekten, Maklern, Bauträgern und. Professor Dr. Thomas Zentgraf, Ultrafast Nanophotonics Group, Warburger Straße , Paderborn. Personen mit dem Namen Thomas Zentgraf. Finde deine Freunde auf Facebook. Melde dich an oder registriere dich bei Facebook, um dich mit Freunden.

Thomas Zentgraf

Sieh dir an, was Thomas Zentgraf (thomaszentgraf) auf Pinterest entdeckt hat – die weltweit größte Ideensammlung. In der Folge berichtet Thomas Zentgraf, wie sich mithilfe der Holografie dreidimensionale Abbilder von Objekten erzeugen lassen und wie. Professor Dr. Thomas Zentgraf, Ultrafast Nanophotonics Group, Warburger Straße , Paderborn.

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Thomas Zentgraf Ultraschnelle Nanophotonik. Guo, X. Wang, X. Liu, B. Meyrath, H. Zhang, T. Second harmonic imaging of plasmonic Pancharatnam-Berry phase metasurfaces coupled to monolayers of WS2 F. Thomas Zentgraf Veranstaltungen Keine Veranstaltungen verfügbar. Tapia, J. Silicon metasurfaces for third harmonic source phase https://websbobet.co/golden-nugget-casino-online/casio-rechner-online.php and multiplexed holography B. Min, X. Helicity dependent directional surface plasmon polariton excitation using a metasurface with interfacial phase discontinuity L. Click here, Y. Qiu, S. Reineke, F.

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Artur Zrenner Theoretical Physics Prof. Torsten Meier Prof. Arno Schindlmayr Prof. Wolf Gero Schmidt Prof. Stefan Schumacher J.

Polina Sharapova Physics Education Prof. Eva Blumberg Prof. Peter Reinhold Prof. Claudia Tenberge.

Ultrafast Nanophotonics. Faculty of Science Department of Physics Prof. Thomas Zentgraf. Exchange with our project partner in China.

The Ultrafast Nanophotonics Group. More news. Events No Events available. More events. Head Prof. Considerable effort has been made to scale down individual plasmonic components into the nanometer regime.

However, a compact plasmonic source that can efficiently generate surface plasmon polaritons SPPs and deliver SPPs to the region of interest is yet to be realized.

Here, bridging the optical antenna theory and the recently developed concept of metamaterials, we demonstrate a subwavelength, highly efficient plasmonic source for directional generation of SPPs.

The designed device consists of two nanomagnetic resonators with detuned resonant frequencies.

At the operating wavelength, incident photons can be efficiently channeled into SPP waves modulated by the electric field polarization.

By tailoring the relative phase at resonance and the separation between the two nanoresonators, SPPs can be steered to predominantly propagate along one specific direction.

This novel magnetic nanoantenna paves a new way to manipulate photons in the near-field, and also could be useful for SPP-based nonlinear applications, active modulations, and wireless optical communications.

Transformational Plasmon Optics more. Beam steering in waveguide arrays more. Dielectric optical cloak more. Publication Date: Physical Optics.

The quest for ultra-compact laser that can directly generate coherent optical fields at the nano-scale, far beyond the The quest for ultra-compact laser that can directly generate coherent optical fields at the nano-scale, far beyond the diffraction limit of light, remains a key fundamental challenge.

Microscopic lasers based on photonic crystals3, metal clad cavities4 and nanowires can now reach the diffraction limit, which restricts both the optical mode size and physical device dimension to be larger than half a wavelength.

While surface plasmons are capable of tightly localizing light, ohmic loss at optical frequencies has inhibited the realization of truly nano-scale lasers.

Recent theory has proposed a way to significantly reduce plasmonic loss while maintaining ultra-small modes by using a hybrid plasmonic waveguide.

Using this approach, we report an experimental demonstration of nano-scale plasmonic lasers producing optical modes times smaller than the diffraction limit, utilizing a high gain Cadmium Sulphide semiconductor nanowire atop a Silver surface separated by a 5 nm thick insulating gap.

Since plasmonic modes have no cut-off, we show downscaling of the lateral dimensions of both device and optical mode. As these optical coherent sources approach molecular and electronics length scales, plasmonic lasers offer the possibility to explore extreme interactions between light and matter, opening new avenues in active photonic circuits, bio-sensing and quantum information technology.

A Carpet Cloak for Visible Light more. View on cat. Plasmon lasers at deep subwavelength scale more. Lorentz model for metamaterials: Optical frequency resonance circuits more.

The assumed charge distri-bution and current distribution J are plotted. The current distribu-tion obeys the boundary condition of vanishing at the ends of the source line.

Ultrafast nonlinear optics in metallic photonic crystals more. Different disorder models with different next-neighbor correlations are artificially introduced into the samples, and their influence We found that uncorrelated disorder reduces the amplitude of spectral features and the width of the stop-bands in the bandstructure.

Correlated disorder additionally excites multiple resonances, resulting in broadened resonances and a destroyed bandstructure even at moderate disorder.

Numerical results are presented that allow to fully interpret the experimental observations. KGaA, Weinheim. Deep Sub-Wavelength Plasmonic Lasers more.

Carpet Cloak Device for Visible Light more. Plasmonic Nano-Laser below the Diffraction Limit more.

These nanowire-based plasmonic lasers are not subjected to diffraction limitations, hence can operate below the photonic mode cut-off diameter of These nanowire-based plasmonic lasers are not subjected to diffraction limitations, hence can operate below the photonic mode cut-off diameter of purely dielectric nanowire lasers.

Lasers beyond the diffraction limit more. However, a consider-able amount of research has been done in recent years on photonic crystals where one of the constituents is a metal [1, 2].

Such structures may Photonic Crystals and Photonic. Surfaces covered by ultrathin plasmonic structures-so-called metasurfaces-have recently been shown to be capable of completely controlling the phase of light, representing a new paradigm for the design of innovative optical elements such Surfaces covered by ultrathin plasmonic structures-so-called metasurfaces-have recently been shown to be capable of completely controlling the phase of light, representing a new paradigm for the design of innovative optical elements such as ultrathin flat lenses, directional couplers for surface plasmon polaritons and wave plate vortex beam generation.

Among the various types of metasurfaces, geometric metasurfaces, which consist of an array of plasmonic nanorods with spatially varying orientations, have shown superior phase control due to the geometric nature of their phase profile.

Metasurfaces have recently been used to make computer-generated holograms, but the hologram efficiency remained too low at visible wavelengths for practical purposes.

The level-phase computer-generated hologram demonstrate Integrated hybrid nanophotonics more. ABSTRACT Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic ABSTRACT Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic integrated circuits.

Optical Waveguide and Room Temperature. Electronic structure: Wide-band, narrow-band, and strongly correlated systems-Optical properties of planar metallic photonic crystal structures: Experiment and theory more.

Adiabatic Gradient Index Plasmonics more. For the experimental investigations, we use an apertureless nearfield optical microscope For the experimental investigations, we use an apertureless nearfield optical microscope working in the near-to mid-infrared spectral range.

The experimental results confirm numerical simulations, which are carried out using a finite difference time domain method.

The detailed properties of varies optical modes are elucidated. Integrated Hybrid Nanophotonics more. Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic integrated Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic integrated circuits.

Deep-subwavelength Integrated Optoelectronics more. ABSTRACT To mitigate the ever worsening bandwidth crisis of current data communication architectures, here we present nanoscale integrated optoelectronics devices including multiplexed nanolasers and high speed graphene optical modulators ABSTRACT To mitigate the ever worsening bandwidth crisis of current data communication architectures, here we present nanoscale integrated optoelectronics devices including multiplexed nanolasers and high speed graphene optical modulators for future photonic integrations with high density.

Transforming Integrated Optics more. Waveguide-plasmon polaritons in photonic crystal slabs with metal nanowires more. Plasmon Dynamics in Coupled Optical Microcavities more.

ABSTRACT We theoretically analyze the coupling effects and the plasmon dynamics in a structure formed by a pure optical microcavity connected to a hybrid plasmonic microcavity in a silicon optical waveguide.

Control of plasmon dynamics in coupled plasmonic hybrid mode microcavities more. Exploiting this parallelism and concepts used in photonics, we describe a novel Exploiting this parallelism and concepts used in photonics, we describe a novel plasmonic device based on the coupling between a plasmonic microcavity and a photonic microcavity.

We theoretically analyze the coupling effects and the plasmon dynamics in structures integrated in silicon optical waveguides.

We observe a strong coupling behavior between the eigenmodes that leads to a periodic excitation of the plasmonic hybrid mode in analogy to a plasmonic pulsar.

We demonstrate that the spectra—and thus the dynamics—of confined plasmons can be tailored with great versatility in plasmonic pulsars in the fs scale.

These structures open new ways in the design and conception of plasmonic and photonic applications and the control and manipulation of hybrid plasmons in the time domain.

Controlling the coupling between localized and delocalized surface plasmon modes in a metallic photonic crystal slab more. Publisher: opticsinfobase.

The ultrafast dephasing of waveguide-plasmon polaritons in metallic photonic crystal slabs is investigated in the femtosecond regime by second-order nonlinear autocorrelation.

Metasurface holography: click fundamentals to applications L. Liu, L. Mikkelsen, J. Ye, F. Peter, A. Eva Blumberg Prof. Paul, F. In der Folge berichtet Thomas Zentgraf, wie sich mithilfe der Holografie dreidimensionale Abbilder von Objekten erzeugen lassen und wie. Sieh dir an, was Thomas Zentgraf (thomaszentgraf) auf Pinterest entdeckt hat – die weltweit größte Ideensammlung. Thomas Zentgraf mit ✉ Adresse ☎ Tel. und mehr bei ☎ Das Telefonbuch ✓ Ihre Nr. 1 für Adressen und Telefonnummern. Sehen Sie sich das Profil von Thomas Zentgraf auf LinkedIn an, dem weltweit größten beruflichen Netzwerk. 5 Jobs sind im Profil von Thomas Zentgraf.

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Controlling the coupling between localized and delocalized surface plasmon modes in a metallic photonic crystal slab. The index is determined by measuring the refractive angle at the exiting visit web page of a prism, demonstrating negative phase propagation in the The assumed charge distri-bution and current distribution J are plotted. Back to top. Numerical link are presented that allow to fully interpret the experimental observations. Https://websbobet.co/online-casino-game/deutsche-wurlitzer-gmbh.php access theoretically the nonlinear properties, rigorous diffraction theory is employed, taking into account the entire tensor of Like more complex two-or three-dimensionally periodic structures,17 also planar metal gratings which are based on a ABSTRACT We theoretically analyze the coupling effects and the plasmon dynamics in a structure formed by a pure optical microcavity connected to a hybrid plasmonic microcavity in a silicon optical waveguide. For a polarization of the light perpendicular to the wires, read more coupling of higher order Bragg resonances of the lattice structure to localized nanowire plasmon resonances can be sensitively controlled by the structure of the Thomas Zentgraf. Xu, S. Wang, B. Stefan Schumacher J. Paul, F. Jens Kube Yang, Q. Remarkable Beste Spielothek in Oberagsdorf finden commit Keine More info verfügbar. Zeuner, X. Protte, F. Furthermore, we show the potential of the hybrid metasurface for tailoring nonlinear processes by adding additional phase information to the SHG signal using the Pancharatnam-Berry phase effect. Helicity dependent directional surface plasmon polariton excitation using a metasurface with interfacial phase discontinuity L. Wei, Y. Thomas Zentgraf

Modern nanotechnology provides us with new methods for arranging and structuring natural materials down to size of few nanometers to obtain well-defined subwavelength structured composite materials.

This opens the path for designing and controlling the optical material properties for certain purposes and particular applications as well as provides a route to a novel integrated design.

This content is partly available in English. Materials Science M. Donat As J. Tim Bartley Prof. Jörg Lindner Prof. Cedrik Meier Prof.

Dirk Reuter Prof. Christine Silberhorn Prof. Thomas Zentgraf Prof. Artur Zrenner Theoretical Physics Prof. Torsten Meier Prof.

Arno Schindlmayr Prof. Wolf Gero Schmidt Prof. Stefan Schumacher J. Polina Sharapova Physics Education Prof. Eva Blumberg Prof. Since plasmonic modes have no cut-off, we show downscaling of the lateral dimensions of both device and optical mode.

As these optical coherent sources approach molecular and electronics length scales, plasmonic lasers offer the possibility to explore extreme interactions between light and matter, opening new avenues in active photonic circuits, bio-sensing and quantum information technology.

A Carpet Cloak for Visible Light more. View on cat. Plasmon lasers at deep subwavelength scale more. Lorentz model for metamaterials: Optical frequency resonance circuits more.

The assumed charge distri-bution and current distribution J are plotted. The current distribu-tion obeys the boundary condition of vanishing at the ends of the source line.

Ultrafast nonlinear optics in metallic photonic crystals more. Different disorder models with different next-neighbor correlations are artificially introduced into the samples, and their influence We found that uncorrelated disorder reduces the amplitude of spectral features and the width of the stop-bands in the bandstructure.

Correlated disorder additionally excites multiple resonances, resulting in broadened resonances and a destroyed bandstructure even at moderate disorder.

Numerical results are presented that allow to fully interpret the experimental observations. KGaA, Weinheim. Deep Sub-Wavelength Plasmonic Lasers more.

Carpet Cloak Device for Visible Light more. Plasmonic Nano-Laser below the Diffraction Limit more.

These nanowire-based plasmonic lasers are not subjected to diffraction limitations, hence can operate below the photonic mode cut-off diameter of These nanowire-based plasmonic lasers are not subjected to diffraction limitations, hence can operate below the photonic mode cut-off diameter of purely dielectric nanowire lasers.

Lasers beyond the diffraction limit more. However, a consider-able amount of research has been done in recent years on photonic crystals where one of the constituents is a metal [1, 2].

Such structures may Photonic Crystals and Photonic. Surfaces covered by ultrathin plasmonic structures-so-called metasurfaces-have recently been shown to be capable of completely controlling the phase of light, representing a new paradigm for the design of innovative optical elements such Surfaces covered by ultrathin plasmonic structures-so-called metasurfaces-have recently been shown to be capable of completely controlling the phase of light, representing a new paradigm for the design of innovative optical elements such as ultrathin flat lenses, directional couplers for surface plasmon polaritons and wave plate vortex beam generation.

Among the various types of metasurfaces, geometric metasurfaces, which consist of an array of plasmonic nanorods with spatially varying orientations, have shown superior phase control due to the geometric nature of their phase profile.

Metasurfaces have recently been used to make computer-generated holograms, but the hologram efficiency remained too low at visible wavelengths for practical purposes.

The level-phase computer-generated hologram demonstrate Integrated hybrid nanophotonics more. ABSTRACT Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic ABSTRACT Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic integrated circuits.

Optical Waveguide and Room Temperature. Electronic structure: Wide-band, narrow-band, and strongly correlated systems-Optical properties of planar metallic photonic crystal structures: Experiment and theory more.

Adiabatic Gradient Index Plasmonics more. For the experimental investigations, we use an apertureless nearfield optical microscope For the experimental investigations, we use an apertureless nearfield optical microscope working in the near-to mid-infrared spectral range.

The experimental results confirm numerical simulations, which are carried out using a finite difference time domain method. The detailed properties of varies optical modes are elucidated.

Integrated Hybrid Nanophotonics more. Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic integrated Based on a hybrid-plasmon HPP platform, we report the first demonstrations of low-loss, deep-subwavelength waveguiding and plasmon semiconductor Nanolaser with room temperature operating, towards wavelength-scale photonic integrated circuits.

Deep-subwavelength Integrated Optoelectronics more. ABSTRACT To mitigate the ever worsening bandwidth crisis of current data communication architectures, here we present nanoscale integrated optoelectronics devices including multiplexed nanolasers and high speed graphene optical modulators ABSTRACT To mitigate the ever worsening bandwidth crisis of current data communication architectures, here we present nanoscale integrated optoelectronics devices including multiplexed nanolasers and high speed graphene optical modulators for future photonic integrations with high density.

Transforming Integrated Optics more. Waveguide-plasmon polaritons in photonic crystal slabs with metal nanowires more.

Plasmon Dynamics in Coupled Optical Microcavities more. ABSTRACT We theoretically analyze the coupling effects and the plasmon dynamics in a structure formed by a pure optical microcavity connected to a hybrid plasmonic microcavity in a silicon optical waveguide.

Control of plasmon dynamics in coupled plasmonic hybrid mode microcavities more. Exploiting this parallelism and concepts used in photonics, we describe a novel Exploiting this parallelism and concepts used in photonics, we describe a novel plasmonic device based on the coupling between a plasmonic microcavity and a photonic microcavity.

We theoretically analyze the coupling effects and the plasmon dynamics in structures integrated in silicon optical waveguides. We observe a strong coupling behavior between the eigenmodes that leads to a periodic excitation of the plasmonic hybrid mode in analogy to a plasmonic pulsar.

We demonstrate that the spectra—and thus the dynamics—of confined plasmons can be tailored with great versatility in plasmonic pulsars in the fs scale.

These structures open new ways in the design and conception of plasmonic and photonic applications and the control and manipulation of hybrid plasmons in the time domain.

Controlling the coupling between localized and delocalized surface plasmon modes in a metallic photonic crystal slab more.

Publisher: opticsinfobase. The ultrafast dephasing of waveguide-plasmon polaritons in metallic photonic crystal slabs is investigated in the femtosecond regime by second-order nonlinear autocorrelation.

We find a drastic modification of the dephasing rates due to We find a drastic modification of the dephasing rates due to interaction between localized particle plasmons and optical waveguide modes and subsequent modification of the photonic density of states.

In the strong coupling regime our measurements give clear evidence for the appearance of ultrafast polaritonic beat phenomena.

All experimental results agree well with theoretical simulations based on a coupled damped harmonic oscillator model.

Physical sciences. We analyze the influence of correlations on the optical properties of disordered metallic photonic crystal slabs experimentally and theoretically.

Different disorder models with different nearest-neighbor correlations are considered. We present a theory that allows us to quantitatively calculate the optical properties of the different samples.

We find that different kinds of correlations produce characteristic spectral features such as peak reduction and inhomogeneous broadening.

These features are caused by reduced excitation efficiencies and the excitation of multiple resonances. Optical properties of planar metallic photonic crystal structures: Experiment and theory more.

Like more complex two-or three-dimensionally periodic structures,17 also planar metal gratings which are based on a Controlling the interaction between localized and delocalized surface plasmon modes: Experiment and numerical calculations more.

The local fields are depicted for an incoming photon Tailoring the photonic band splitting in metallodielectric photonic crystal superlattices more.

ABSTRACT We experimentally and theoretically investigate the influence of a structured supercell on the band splitting of one-dimensional metallodielectric photonic crystal superlattices.

We show that the splitting of the photonic bands We show that the splitting of the photonic bands can be modified by periodic structuring of the elementary unit cell of the photonic crystal.

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