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Some unusual subwavelength resonances and effects: EIT, Fano -resonance,
Содержание
- 1. Some unusual subwavelength resonances and effects: EIT, Fano -resonance,
- 2. Electromagnetically induced transparency - is a effect
- 3. Split rings with asymmetry (Metamaterial Induced Transparency)2.
- 4. Fano resonance is a type of resonant
- 5. The Fano resonance in metamaterials associated with
- 6. Nature Mat. 9 707Plasma frequencyFano- resonance in the metallic nano-sphere
- 7. Nature Mat. 9 707A narrow spectral lineFrequency scanningHigh Q-factorStrong field localizationSensingFano- resonance
- 8. Nano Lett. 8 3983Fano- resonance. Other types of the particles. System of the nano-disks
- 9. Nano Lett. 10 2721Science 328 1135Fano- resonance. Other types of the particles. Nano-clusters of Ag, Au
- 10. Vortex resonance- occurs in plasmonic particles and
- 11. гдеThe strong field conditions:c
- 12. Y- Neiman functionThe strong field localization conditionsJ.
- 13. Opt. Express 13 8372Phys. Rev. Lett. 97 263902Perfect absorption
- 14. Vortex/whirpool resonances in nano-sphere. Examples. Poynting Vector
- 15. Vortex/whirpool resonances in nano-sphere. Examples. Poynting Vector
- 16. Vortex/whirpool resonances. Example of nano- ellipsoid . Poynting Vector
- 17. Opt. Express 18 19665Vortex/whirpool resonances. Example of Yin and yang Symbol
- 18. Opt. Express 18 19665Vortex/whirpool resonances. Example of Yin and Yang Symbol. Vector Poynting
- 19. Opt. Express 18 19665Vortex/whirpool resonances. Example of Yin and yang Symbol. Fields distributions
- 20. New J. Phys. 12 063006Vortex/whirpool resonances. Example of a model of a Black hole. Vector Poynting
- 21. Applications: Strong field localization As element of
- 22. 3. Toroidal Dipole in MetamaterialsWhat is toroidal
- 23. Toroidal dipole in natureY. B. Zel'dovich, 1958Naumov
- 24. First demonstration of toroidal response by metamaterialsT. Kaelberer et al, Science 330, 1510 (2010)
- 25. Toroidal response in multipoles expansion. Radiating power
- 26. Family of the toroidal metamolecules. Complicated disign?
- 27. 2. Toroidal response in dielectric metamaterials- without
- 28. LiTaO3 cluster: Reflection and Transmission; Radiated
- 29. Non-Trivial Excitation: P=ikT and analog of Electromagnetically
- 30. For Electric dipoleFor Toroidal dipoleNon-Trivial non-radiating toroidal
- 31. Non-Trivial Excitation: P=ikT P=ikTE and
- 32. Поля точечного анаполя, ближняя зона: P=ikTP=ikTE и
- 33. Слайд 33
- 34. Слайд 34
- 35. Vortices in nano-particles give possibilities for absorption
- 36. Скачать презентанцию
Electromagnetically induced transparency - is a effect of a coherent optical nonlinearity which renders a medium transparent window over a narrow spectral range within an absorption line. Electromagnetically Induced Transparency
Слайды и текст этой презентации
Слайд 2Electromagnetically induced transparency - is a effect of a coherent
optical nonlinearity which renders a medium transparent window over a
narrow spectral range within an absorption line. Electromagnetically Induced Transparency
Слайд 3Split rings with asymmetry
(Metamaterial Induced Transparency)
2. Plasmonic molecule with
Fano-resonance
(Plasmon Induced Transparency)
“Trapped mode” resonance
Bright/dark mode resonance
Metamaterial-Induced Transparency: Sharp Fano
Resonances and Slow Light //Nikitas Papasimakis and Nikolay I. Zheludev //Optics and Photonics News Vol. 20, Issue 10, pp. 22-27 (2009), Plasmon-Induced Transparency in Metamaterials // Shuang Zhang, Dentcho A. Genov, Yuan Wang, Ming Liu, and Xiang Zhang // PRL 101, 047401 (2008)
Sharp Trapped-Mode Resonances in Planar Metamaterials with a Broken Structural Symmetry // V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis and N. I. Zheludev // PRL 99, 147401 (2007)
How to see EIT in metamaterials
Слайд 4Fano resonance is a type of resonant scattering phenomenon that
gives rise to an asymmetric line-shape. Interference between a background
and a resonant scattering process produces the asymmetric line-shape. Fano- resonance
Слайд 5The Fano resonance in metamaterials associated with mutual excitation of
at least two scattering channels - modes occurring in the
inclusions of metamaterials. This is possible due to the collective excitation of dark mode, which interferes with a resonances bright mode. As a result of such interference, it occurs asymmetrical peak of the transmission of electromagnetic waves through the layer of the metamaterial. Usually, bright mode has a strong connection with the incident plane wave. In contrast, dark mode weakly coupled with the incident plane wave and can not be directly excited it. Thus, in the vicinity of the resonance frequency, constructive and destructive interference between these modes are occured, which manifests itself as acute asymmetrical peak Fano- resonance in the scattering metamoleculesFano- resonance
Слайд 7Nature Mat. 9 707
A narrow spectral line
Frequency scanning
High Q-factor
Strong field
localization
Sensing
Fano- resonance
Слайд 9Nano Lett. 10 2721
Science 328 1135
Fano- resonance. Other types of
the particles. Nano-clusters of Ag, Au
Слайд 10Vortex resonance- occurs in plasmonic particles and accompanied by vortex
distribution of the Poynting vector close to the nano-particle and
penetrated the fields inside particle. Strong retardation, absorbtion.2. Vortex/whirpool resonances in nano-particles
Слайд 11где
The strong field conditions:
c
field inside particle
Vortex/whirpool resonances in nano-sphere. Extinction’s coefficients
Слайд 12Y- Neiman function
The strong field localization conditions
J. Opt. Soc. Am.
B 24 A89
Opt. Express 13 8372
Phys. Rev. Lett. 97 263902
Vortex/whirpool
resonances in nano-sphere. Extinction’s coefficients
Слайд 18Opt. Express 18 19665
Vortex/whirpool resonances. Example of Yin and Yang
Symbol. Vector Poynting
Слайд 19Opt. Express 18 19665
Vortex/whirpool resonances. Example of Yin and yang
Symbol. Fields distributions
Слайд 20New J. Phys. 12 063006
Vortex/whirpool resonances. Example of a model
of a Black hole. Vector Poynting
Слайд 21Applications:
Strong field localization
As element of delay line
High
Q-factor resonator
Element of the nano-antennas?
Vortex/whirpool resonances
Слайд 223. Toroidal Dipole in Metamaterials
What is toroidal dipole
T. Kaelberer
et al, Science 330, 1510 (2010)
B. Zel'dovich, Sov. Phys. JETP,
6,1184 (1958)
Слайд 23Toroidal dipole in nature
Y. B. Zel'dovich, 1958
Naumov I, at al.,
2004
M. Kläui at al., 2003
Y. F. Popov at al., 1998
Y.
V. Kopaev at al., 2009L. Ungur at al., 2012
Ceulemans at al., 1998
A. Karsisiotis at al., 2013
Слайд 24First demonstration of toroidal response by metamaterials
T. Kaelberer et al,
Science 330, 1510 (2010)
Слайд 25Toroidal response in multipoles expansion. Radiating power of multipoles.
P- Electric
dipole moment
M- Magnetic dipole moment
T- toroidal dipole moment
Q- Electric quadrupole
momentM – Magnetic quadrupole moment
j- current density
T. Kaelberer et al, Science (2010)
E. E. Radescu and G. Vaman, PRE (2002)
We need to consider this term in order to correctly describe the characteristics of toroidal objects.
Слайд 272. Toroidal response in dielectric metamaterials- without Joule losses
T. Kaelberer
et al, Science 330, 1510 (2010)
High index dielectrics :
In
microwave- BSTO ceramicsS. O'Brien and J. B. Pendry, 2002
L. Peng and al., 2007
m
Слайд 28 LiTaO3 cluster: Reflection and Transmission; Radiated power of multipoles
Closed
magnetic field- Toroidal response.
No fileds between cylinders
Strong localization of E-
field between cylinders- Exitation of Nonlinearities
Слайд 29Non-Trivial Excitation: P=ikT and analog of Electromagnetically induced transparency
Fedotov et al., Scientific Reports 3, 2967
Afanasiev,
G. N. & Stepanovsky, Y. P., J. Phys. A Math. Gen. 28, 4565Interference of P and T gives EIT and symmetrical
Peak of transmission
Слайд 30For Electric dipole
For Toroidal dipole
Non-Trivial non-radiating toroidal source
Fedotov et al.,
Scientific Reports 3, 2967
Afanasiev, G. N. & Stepanovsky, Y. P., J.
Phys. A Math. Gen. 28, 4565
Слайд 31Non-Trivial Excitation: P=ikT
P=ikT
E and H vanish in
FAR-field zone
Fedotov et al., Scientific Reports 3, 2967
Afanasiev, G.
N. & Stepanovsky, Y. P., J. Phys. A Math. Gen. 28, 4565
Слайд 32Поля точечного анаполя, ближняя зона: P=ikT
P=ikT
E и H исчезают везде,
кроме r=0:
Бесконечная добротность?
δ- функция
Q=0W/Pd
Nemkov et al., Non-radiating sources, dynamic
anapole and Aharonov-Bohm effect, arxiv 1605.09033Basharin et al., Extremely High Q-factor metamaterials due to Anapole Excitation, arxiv 1608.03233
Слайд 35Vortices in nano-particles give possibilities for absorption and localization
Fano
– resonance assymetric peak
Toroidal response in metamaterials is novel very
promising candidate for optics Conclusions
Thank you and questions?
