Self-adjusted all-dielectric metasurfaces for deep ultraviolet femtosecond pulse generation

Makarov, Sergey; Tsypkin, A. N.; Voytova, T. A.; Milichko, Valentin A.; Mukhin, I. S.; Yulin, A. V.; Putilin, S. É.; Baranov, M. A.; Krasnok, Alex; Морозов, И. А.; Belov, Pavel A.

doi:10.1039/c6nr04860a

Cited by 59 publications

(46 citation statements)

References 29 publications

(46 reference statements)

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“…Shortly after, the concept of ” magnetic light ” has been experimentally observed in the visible , infrared , and microwave frequency ranges. Such nanoparticles have attracted significant attention for their resonant behavior and thus have been widely employed for enhancing the light‐matter interaction .…”

Section: Magnetic Purcell Factor In Nanoantennasmentioning

confidence: 99%

Modifying magnetic dipole spontaneous emission with nanophotonic structures

Baranov

Savelev

et al. 2017

Laser & Photonics Reviews

135

119

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Tailoring of electromagnetic spontaneous emission predicted by E. M. Purcell more than 50 years ago has undoubtedly proven to be one of the most important effects in the rich areas of quantum optics and nanophotonics. Although during the past decades the research in this field has been focused on electric dipole emission, the recent progress in nanofabrication and study of magnetic quantum emitters, such as rare‐earth ions, has stimulated the investigation of the magnetic side of spontaneous emission. Here, we review the state‐of‐the‐art advances in the field of spontaneous emission enhancement of magnetic dipole quantum emitters with the use of various nanophotonics systems. We provide the general theory describing the Purcell effect of magnetic emitters, overview realizations of specific nanophotonics structures allowing for the enhanced magnetic dipole spontaneous emission, and give an outlook on the challenges in this field, which remain open to future research.

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Section: Magnetic Purcell Factor In Nanoantennasmentioning

confidence: 99%

Modifying magnetic dipole spontaneous emission with nanophotonic structures

Baranov

Savelev

et al. 2017

Laser & Photonics Reviews

135

119

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“…In the last several years high-index dielectric nanoparticles and nanostructures [1][2][3] proved to be a promising platform for various nanophotonic applications, in particular for the design of functional nanoantennas [4][5][6], enhanced spontaneous emission [7][8][9][10], photovoltaics [11], frequency conversion [12][13][14], Raman scattering [15], and sensing [16]. The great interest in such nanostructures is caused mainly by their ability to control the electric and magnetic components of light at the nanoscale [1], while exhibiting low dissipative losses inherent to the materials with a negligible concentration of free charges [16].…”

Section: Introductionmentioning

confidence: 99%

All-Optical Switching and Unidirectional Plasmon Launching with Nonlinear Dielectric Nanoantennas

Krasnok

Lepeshov

et al. 2018

Phys. Rev. Applied

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High-index dielectric nanoparticles have become a powerful platform for modern light science, enabling various fascinating applications, especially in nonlinear nanophotonics for which they enable special types of optical nonlinearity, such as electron-hole plasma photoexcitation, which are not inherent to plasmonic nanostructures. Here, we propose a novel geometry for highly tunable alldielectric nanoantennas, consisting of a chain of silicon nanoparticles excited by an electric dipole source, which allows tuning their radiation properties via electron-hole plasma photoexcitation. We show that the slowly guided modes determining the Van Hove singularity of the nanoantenna are very sensitive to the nanoparticle permittivity, opening up the ability to utilize this effect for efficient all-optical modulation. We show that by pumping several boundary nanoparticles with relatively low intensities may cause dramatic variations in the nanoantenna radiation power patterns and Purcell factor. We also demonstrate that ultrafast pumping of the designed nanoantenna allows unidirectional launching of surface plasmon-polaritons, with interesting implications for modern nonlinear nanophotonics.

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“…All‐dielectric nonlinear nanophotonics based on high refractive index dielectric materials has become a prospective paradigm in modern optics, owing to recent advances in harmonics generation and ultrafast all‐optical modulation . In fact, all‐dielectric nanoantennas and metasurfaces possess much smaller parasitic Joule losses at high intensities as compared with their plasmonic counterparts, whereas their nonlinear properties are similar.…”

Section: Introductionmentioning

confidence: 99%

Photogenerated Free Carrier‐Induced Symmetry Breaking in Spherical Silicon Nanoparticle

Rudenko

Ladutenko

Makarov

et al. 2018

Advanced Optical Materials

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of all-dielectric nanoantennas [10,12,13] and metasurfaces. [2,9,11,14,15] In previous works on all-dielectric nonlinear nanostructures, the building blocks (nanoparticles) were considered as objects with dielectric permittivity homogeneously distributed over nanoparticle (NP). Therefore, in order to manipulate the propagation angle of the transmitted light, it was proposed to use complicated nanostructures with reduced symmetry. [13,17,18] On the other hand, plasma explosion imaging technique [19] revealed in situ strongly asymmetrical electronhole plasma (EHP) distribution in various dielectric NPs during their irradiation by femtosecond laser pulses. Therefore, local permittivity in the photoexcited NPs can be significantly inhomogeneous, and symmetry of nanoparticles can be reduced.In this paper, we show theoretically that ultrafast photoexcitation in a spherical silicon NP leads to a strongly inhomogeneous EHP distribution, as is shown schematically in Figure 1. To reveal and analyze this effect, we perform a full-wave numerical simulation. We consider an intense femtosecond (fs) laser pulse to interact with a silicon NP, supporting Mie resonances and two-photon EHP generation. In particular, we couple finite-difference timedomain (FDTD) method used to solve 3D Maxwell equations with kinetic equations, describing nonlinear EHP generation. 3D transient variation of the material dielectric permittivity is calculated for NPs of several sizes. The obtained results propose a novel strategy to create complicated nonsymmetrical nanostructures by using single photoexcited spherical silicon NPs. Moreover, we show that a dense EHP can be generated at deeply subwavelength scale (<λ/10), supporting the formation of small metalized parts inside the NP. In fact, such effects transform a dielectric NP to a hybrid metal-dielectric one, extending the functionality of the ultrafast optical nanoantennas. Modeling DetailsWe focus attention on silicon because this material is promising for the implementation of numerous nonlinear photonic devices. This advantage is based on a broad range of optical nonlinearities, two-photon absorption, as well as a possibility of the photoinduced EHP excitation. [20] Furthermore, silicon nanoantennas demonstrate a sufficiently high damage threshold due to the high melting temperature (≈1690 K), whereas silicon All-dielectric nonlinear nanophotonic devices are extremely prospective for ultrafast optical signal processing at the nanoscale. High refractive index (e.g., silicon) nanoparticles supporting magnetic optical response are shown to be suitable for ultrafast all-optical modulation. A strong modulation of the dielectric permittivity is achieved via photogeneration of free carriers in the regime of simultaneous excitation of both the electric and magnetic Mie resonances and the off-resonant regimes, resulting in an effective transient reconfiguration of nanoparticle scattering properties. Here, the effects of the related optical inhomogeneities in 3D are examined by coupling numerical electr...

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Self-adjusted all-dielectric metasurfaces for deep ultraviolet femtosecond pulse generation

Cited by 59 publications

References 29 publications

Modifying magnetic dipole spontaneous emission with nanophotonic structures

Modifying magnetic dipole spontaneous emission with nanophotonic structures

All-Optical Switching and Unidirectional Plasmon Launching with Nonlinear Dielectric Nanoantennas

Photogenerated Free Carrier‐Induced Symmetry Breaking in Spherical Silicon Nanoparticle

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