scholarly journals Polarization-Independent Large Third-Order-Nonlinearity of Orthogonal Nanoantennas Coupled to an Epsilon-Near-Zero Material

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3424
Author(s):  
Wenjuan Shi ◽  
Hongjun Liu ◽  
Zhaolu Wang
Keyword(s):  
Optical Nonlinearity ◽  
Optical Signal ◽  
Orthogonal Polarization ◽  
Absolute Maximum ◽  
Strong Nonlinearity ◽  
Third Order ◽  
Highly Nonlinear ◽  
All Optical ◽  
Nonlinear Performance ◽  
Epsilon Near Zero

The nonlinear optical response of common materials is limited by bandwidth and energy consumption, which impedes practical application in all-optical signal processing, light detection, harmonic generation, etc. Additionally, the nonlinear performance is typically sensitive to polarization. To circumvent this constraint, we propose that orthogonal nanoantennas coupled to Al-doped zinc oxide (AZO) epsilon-near-zero (ENZ) material show a broadband (~1000 nm bandwidth) large optical nonlinearity simultaneously for two orthogonal polarization states. The absolute maximum value of the nonlinear refractive index n2 is 7.65 cm2∙GW−1, which is 4 orders of magnitude larger than that of the bare AZO film and 7 orders of magnitude larger than that of silica. The coupled structure not only realizes polarization independence and strong nonlinearity, but also allows the sign of the nonlinear response to be flexibly tailored. It provides a promising platform for the realization of ultracompact, low-power, and highly nonlinear all-optical devices on the nanoscale.

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%.

Large and anisotropic second harmonic generation of V-V binary phosphorene derivative with permanent dipole

2021 ◽  
Author(s):  
Yadong Wei ◽  
Songsong Wang ◽  
Kaijuan Pang ◽  
Xiaodong Xu ◽  
Ngeywo Tolbert Kaner ◽  
...  
Keyword(s):  
Signal Processing ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
2D Materials ◽  
Optical Nonlinearity ◽  
Optical Signal ◽  
Two Dimensional ◽  
All Optical ◽  
Intense Research

Optical nonlinearity of two-dimensional (2D) materials with permanent dipole is a subject of intense research in the fields ranging from all-optical signal processing to laser nanotechnology due to the potential...

Synthesis and Characterization of TiO2 -Nb2O5 Borosilicate Glasses for Nonlinear Optical Waveguides

1986 ◽  
Vol 88 ◽  
Author(s):  
E. M. Vogel ◽  
S. R. Fribérg ◽  
L. Jackel ◽  
P. W. Smith
Keyword(s):  
Optical Waveguides ◽  
Nonlinear Optical ◽  
Building Blocks ◽  
Optical Nonlinearity ◽  
Borosilicate Glasses ◽  
Optical Logic ◽  
Third Order ◽  
All Optical ◽  
Nonlinear Index

ABSTRACTNonlinear optical glasses with fast responding nonlinearities and very low absorption are promising materials for use in ultra-fast (picosecond) all-optical switches. We have synthesized a TiO2 Nb2O5. B2O3 Na2O SiO2 glass with the intention of optimizing both the third order optical nonlinearity and suitability for fabrication of optical waveguides. The nonlinear index coefficient n2 for this glass composition was found to be 4X 10-19 m2/W, a factor of two greater than the largest value previously reported for commercially available TiO2-silicate glasses. Optical waveguides with a maximum index change of Δn = 0.12 were made using silver-sodium ion exchange. These waveguides may become building blocks for future all-optical logic elements and circuits.

scholarly journals Polarization-selected nonlinearity transition in gold dolmens coupled to an epsilon-near-zero material

Nanophotonics ◽  
2020 ◽  
Vol 9 (16) ◽  
pp. 4839-4851
Author(s):  
Xinxiang Niu ◽  
Xiaoyong Hu ◽  
Quan Sun ◽  
Cuicui Lu ◽  
Yuanmu Yang ◽  
...  
Keyword(s):  
Optical Materials ◽  
Ultrafast Lasers ◽  
Optical Computing ◽  
Coupled System ◽  
Optical Nonlinearity ◽  
Natural Material ◽  
Practical Applications ◽  
System A ◽  
Nonlinear Performance ◽  
Epsilon Near Zero

AbstractNonlinear optical materials are cornerstones of modern optics including ultrafast lasers, optical computing, and harmonic generation. The nonlinear coefficients of optical materials suffer from limitations in strength and bandwidth. Also, the nonlinear performance is typically monotonous without polarization selectivity, and to date, no natural material has been found to possess nonlinear coefficients with positive or negative signs simultaneously at a specific wavelength, all of which impede practical applications in the specific scenario. Here, we realize broadband large optical nonlinearity accompanied with ultrafast dynamics in a coupled system composed of gold dolmens and an epsilon-near-zero material for dual orthogonal polarizations simultaneously. The system also shows the polarization-selected nonlinearity transition properties, where the sign of the optical nonlinear refractive indexes can be converted via polarization switching. This guarantees active transitions from self-focusing to self-defocusing by polarization rotation without tuning wavelength in practical utilizations. The measured nonlinear refractive index and susceptibility demonstrate more than three orders of magnitude enhancement over a 400-nm-bandwidth compared with the constituents, while maintaining the sub-1 ps time response. The realized enhanced, ultrafast response, and the polarization tunability ensure the designed system a promising platform for the development of integrated ultrafast laser sources, all-optical circuits and quantum chips.

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