scholarly journals Off-Resonance Control and All-Optical Switching: Expanded Dimensions in Nonlinear Optics

2019 ◽  
Vol 9 (20) ◽  
pp. 4252 ◽  
Author(s):  
David S. Bradshaw ◽  
Kayn A. Forbes ◽  
David L. Andrews
Keyword(s):  
Optical Switching ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Nonlinear Effects ◽  
Optical Nonlinearity ◽  
Moderate Intensity ◽  
Linear Absorption ◽  
Simultaneous Application ◽  
All Optical ◽  
All Optical Switching

The theory of non-resonant optical processes with intrinsic optical nonlinearity, such as harmonic generation, has been widely understood since the advent of the laser. In general, such effects involve multiphoton interactions that change the population of each input optical mode or modes. However, nonlinear effects can also arise through the input of an off-resonant laser beam that itself emerges unchanged. Many such effects have been largely overlooked. Using a quantum electrodynamical framework, this review provides detail on such optically nonlinear mechanisms that allow for a controlled increase or decrease in the intensity of linear absorption and fluorescence and in the efficiency of resonance energy transfer. The rate modifications responsible for these effects were achieved by the simultaneous application of an off-resonant beam with a moderate intensity, acting in a sense as an optical catalyst, conferring a new dimension of optical nonlinearity upon photoactive materials. It is shown that, in certain configurations, these mechanisms provide the basis for all-optical switching, i.e., the control of light-by-light, including an optical transistor scheme. The conclusion outlines other recently proposed all-optical switching systems.

scholarly journals Ultrafast sub–30-fs all-optical switching based on gallium phosphide

2019 ◽  
Vol 5 (6) ◽  
pp. eaaw3262 ◽  
Author(s):  
Gustavo Grinblat ◽  
Michael P. Nielsen ◽  
Paul Dichtl ◽  
Yi Li ◽  
Rupert F. Oulton ◽  
...  
Keyword(s):  
Gallium Phosphide ◽  
Optical Switching ◽  
Near Infrared ◽  
Optical Nonlinearity ◽  
Photon Absorption ◽  
Linear Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
All Optical ◽  
All Optical Switching

Gallium phosphide (GaP) is one of the few available materials with strong optical nonlinearity and negligible losses in the visible (λ > 450 nm) and near-infrared regime. In this work, we demonstrate that a GaP film can generate sub–30-fs (full width at half maximum) transmission modulation of up to ~70% in the 600- to 1000-nm wavelength range. Nonlinear simulations using parameters measured by theZ-scan approach indicate that the transmission modulation arises from the optical Kerr effect and two-photon absorption. Because of the absence of linear absorption, no slower free-carrier contribution is detected. These findings place GaP as a promising ultrafast material for all-optical switching at modulation speeds of up to 20 THz.

scholarly journals Mechanistic principles and applications of resonance energy transfer

2008 ◽  
Vol 86 (9) ◽  
pp. 855-870 ◽  
Author(s):  
David L Andrews
Keyword(s):  
Energy Transfer ◽  
Optical Switching ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Synthetic Analogue ◽  
Primary Mechanism ◽  
Synthetic Materials ◽  
Förster Energy Transfer ◽  
All Optical ◽  
All Optical Switching

Resonance energy transfer is the primary mechanism for the migration of electronic excitation in the condensed phase. Well-known in the particular context of molecular photochemistry, it is a phenomenon whose much wider prevalence in both natural and synthetic materials has only slowly been appreciated, and for which the fundamental theory and understanding have witnessed major advances in recent years. With the growing to maturity of a robust theoretical foundation, the latest developments have led to a more complete and thorough identification of key principles. The present review first describes the context and general features of energy transfer, then focusing on its electrodynamic, optical, and photophysical characteristics. The particular role the mechanism plays in photosynthetic materials and synthetic analogue polymers is then discussed, followed by a summary of its primarily biological structure determination applications. Lastly, several possible methods are described, by the means of which all-optical switching might be effected through the control and application of resonance energy transfer in suitably fabricated nanostructures.Key words: FRET, Förster energy transfer, photophysics, fluorescence, laser.

Third‐order optical nonlinearity and all‐optical switching in porous silicon

1995 ◽  
Vol 67 (3) ◽  
pp. 323-325 ◽  
Author(s):  
Fryad Z. Henari ◽  
Kai Morgenstern ◽  
Werner J. Blau ◽  
Vladimir A. Karavanskii ◽  
Vladimir S. Dneprovskii
Keyword(s):  
Porous Silicon ◽  
Optical Switching ◽  
Optical Nonlinearity ◽  
Third Order ◽  
All Optical ◽  
All Optical Switching

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

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%.

PHOTONIC SWITCHING DEVICES BASED ON EXCITED-STATE NONLINEAR ABSORPTION IN C60

1993 ◽  
Vol 02 (04) ◽  
pp. 551-558 ◽  
Author(s):  
CHUNFEI LI ◽  
MIAO YANG ◽  
FENGYUN GUO ◽  
YUXIAO WANG ◽  
KUNIO TADA
Keyword(s):  
Excited State ◽  
Nonlinear Absorption ◽  
Optical Switching ◽  
Experimental Studies ◽  
Linear Absorption ◽  
Photonic Switching ◽  
All Optical ◽  
Optical Switching Devices ◽  
All Optical Switching ◽  
Switching Devices

A new principle of all-optical switching devices based on the excited-state nonlinear absorption working at non-resonant frequency with small linear absorption are proposed. The theory and experimental studies using C60 material are presented in this paper.

scholarly journals Enhanced Nonlinear Effects in Metamaterials and Plasmonics

2012 ◽  
Vol 1 (1) ◽  
pp. 46 ◽  
Author(s):  
C. Argyropoulos ◽  
P.-Y. Chen ◽  
A. Alù
Keyword(s):  
Optical Switching ◽  
Field Enhancement ◽  
Nonlinear Effects ◽  
Large Field ◽  
Q Factor ◽  
Optical Components ◽  
Nonlinear Materials ◽  
All Optical ◽  
Nonlinear Operation ◽  
All Optical Switching

In this paper we provide an overview of the anomalous and enhanced nonlinear effects available when optical nonlinear materials are combined inside plasmonic waveguide structures. Broad, bistable and all-optical switching responses are exhibited at the cut-off frequency of these waveguides, characterized by reduced Q-factor resonances. These phenomena are due to the large field enhancement obtained inside specific plasmonic gratings, which ensures a significant boosting of the nonlinear operation. Several exciting applications are proposed, which may potentially lead to new optical components and add to the optical nanocircuit paradigm.

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