Femtosecond-scale all-optical switching in oxyfluorogallate glass induced by nonlinear multiphoton absorption

Ultrafast all-optical switching based on oxyfluorogallate glass induced by nonlinear multiphoton absorption is reported and the ultrafast response time ∼350 fs is achieved by the femtosecond laser pump and probe technology.

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All-Optical Switching of an Epsilon-Near-Zero Plasmon in ITO

10.21203/rs.3.rs-40947/v1 ◽

2020 ◽

Author(s):

Justus Bohn ◽

Ting-Shan Luk ◽

Craig Tollerton ◽

Sam Hutchins ◽

Igal Brener ◽

...

Keyword(s):

Plasmon Resonance ◽

Indium Tin Oxide ◽

Optical Switching ◽

Pump Intensity ◽

Optical Nonlinearity ◽

Pump And Probe ◽

Plasmon Frequency ◽

All Optical ◽

All Optical Switching ◽

Epsilon Near Zero

Abstract Nonlinear optical devices and their implementation into modern nanophotonic architectures are constrained by their usually moderate nonlinear response. Recently, epsilon-near-zero (ENZ) materials have been found to have a strong optical nonlinearity, which can be enhanced through the use of cavities or nano-structuring. Here, we study the pump dependent properties of the plasmon resonance in the ENZ region in a thin layer of thin indium tin oxide (ITO). Exciting this mode using the Kretschmann-Raether configuration, we study reflection switching properties of a 60nm layer close to the resonant plasmon frequency. We demonstrate the thermal switching mechanism, which results in a shift in the plasmon resonance frequency of 20THz for a TM pump intensity of 75GW/cm2. For degenerate pump and probe frequencies, we highlight an additional coherent contribution, not previously isolated in ENZ nonlinear optics studies, which leads to an overall pump induced change in reflection from 1% to 45%.

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Plasmonic layer-selective all-optical switching of magnetization with nanometer resolution

Nature Communications ◽

10.1038/s41467-019-12699-0 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 17

Author(s):

D. O. Ignatyeva ◽

C. S. Davies ◽

D. A. Sylgacheva ◽

A. Tsukamoto ◽

H. Yoshikawa ◽

...

Keyword(s):

Femtosecond Laser ◽

Magnetic Recording ◽

Optical Switching ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

All Optical ◽

Polarization Axis ◽

Linearly Polarized ◽

All Optical Switching ◽

Better Than

Abstract All-optical magnetization reversal with femtosecond laser pulses facilitates the fastest and least dissipative magnetic recording, but writing magnetic bits with spatial resolution better than the wavelength of light has so far been seen as a major challenge. Here, we demonstrate that a single femtosecond laser pulse of wavelength 800 nm can be used to toggle the magnetization exclusively within one of two 10-nm thick magnetic nanolayers, separated by just 80 nm, without affecting the other one. The choice of the addressed layer is enabled by the excitation of a plasmon-polariton at a targeted interface of the nanostructure, and realized merely by rotating the polarization-axis of the linearly-polarized ultrashort optical pulse by 90°. Our results unveil a robust tool that can be deployed to reliably switch magnetization in targeted nanolayers of heterostructures, and paves the way to increasing the storage density of opto-magnetic recording by a factor of at least 2.

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Ultrafast all‐optical switching in GaAlAs directional couplers at 1.55 μm without multiphoton absorption

Applied Physics Letters ◽

10.1063/1.110097 ◽

1993 ◽

Vol 63 (26) ◽

pp. 3562-3564 ◽

Cited By ~ 36

Author(s):

K. Al‐hemyari ◽

A. Villeneuve ◽

J. U. Kang ◽

J. S. Aitchison ◽

C. N. Ironside ◽

...

Keyword(s):

Optical Switching ◽

Multiphoton Absorption ◽

Directional Couplers ◽

All Optical ◽

All Optical Switching

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The Characteristics of All-Optical Switching and Modulation in Phenoxy-Phthalocyanines Liquid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.284-287.2830 ◽

2013 ◽

Vol 284-287 ◽

pp. 2830-2834

Author(s):

Yun Dong Zhang ◽

Cheng Bao Yao ◽

Hai Tao Yin ◽

Chang Qiu Yu ◽

Jin Li ◽

...

Keyword(s):

Excited State ◽

Light Intensity ◽

Response Time ◽

Optical Switching ◽

Pump Light ◽

Pump Probe ◽

All Optical ◽

Probe Experiment ◽

Pump Probe Experiment ◽

All Optical Switching

We present our experimental results on the measurements of excited state dynamics in 2, 9, 16, 23-phenoxy-phthalocyanine (Pc1) and 2, 9, 16, 23-phenoxy-phthalocyanine-zinc (Pc2) using the pump-probe experiment. The results show that the All-Optical Switching (A-OS) response time of Pc2 longer than that of Pc1, and switch-off and -on times of A-OS for Pc2 are 1.2 and 11.6 μs and for Pc1 are 2.3 and 7.8 μs at the same intensity. Moreover, analysis of modulation characteristics of A-OS shows that the stronger the light intensity of the pump light is, the smaller the normalized transmittance is and the shorter the response time of A-OS is. The consequences of such short lifetimes are also discussed in view of the strong A-OS properties of these molecules.

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