Modifying magnetic dipole spontaneous emission with nanophotonic structures

Baranov, Denis G.; Savelev, Roman S.; Li, Sergey V.; Krasnok, Alex; Alù, Andrea

doi:10.1002/lpor.201600268

Cited by 130 publications

(116 citation statements)

References 164 publications

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“…The Purcell factor numerically characterizes the Purcell effect, i.e., changing (reducing or increasing) of the decay rate of an emitter near a resonator [132], [133]. The Purcell factor can be found analytically [134]- [142] or numerically [138] for different resonators.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Active Nanophotonics

Krasnok

Alù

2020

Proc. IEEE

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Recent progress in nanofabrication has led to tremendous technological developments in nanophotonics, which rely on the interaction of light with nanostructured matter. Nanophotonics has experienced a large surge of interest in recent years, from basic research to applied technology.The increased importance of extremely low-energy data processing at ultra-fast speeds has been encouraging the use of light for signal transport and processing. Energy demands and interaction time scales become smaller with the physical size of the nanostructures, hence nanophotonics opens the opportunity of integrating a large number of devices that can generate, control, modulate, sense and process light signals at ultrafast speeds and below femtojoule/bit energy levels.However, losses and diffraction pose fundamental challenges to the fundamental ability of nanophotonic structures to confine light efficiently in smaller and smaller volumes. In this framework, active nanophotonics, which combines the latest advances in nanotechnology with gain materials, has become in recent years a vital area of optics research, both from the physics, material science, and engineering standpoint. In this paper, we review recent efforts in enabling active nanodevices for lasing and optical sources, loss compensation, and to realize new optical functionalities, like -symmetry, exceptional points and nontrivial lasing based on suitably engineered distributions of gain and loss in nanostructures.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Active Nanophotonics

Krasnok

Alù

2020

Proc. IEEE

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“…To demonstrate the general approach to calculate these decay rates, we consider the vacuum decay rates associated with the MD (Γ (0) 3m ) and ED transition (Γ (0) 3e ), depicted in figure 2. These decay rates are modified in presence of a photonic nanostructure [32][33][34][35][36][37]:…”

Section: Electric and Magnetic Ldos Of Photonic Nanostructuresmentioning

confidence: 99%

Quantum theory of near-field optical imaging with rare-earth atomic clusters

Majorel¹,

Girard²,

Cuche³

et al. 2020

J. Opt. Soc. Am. B

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Scanning near-field optical imaging (SNOM) using local active probes provides in general images of the electric part of the photonic local density of states. However, certain atomic clusters can supply more information by simultaneously revealing both the magnetic (m-LDOS) and the electric (e-LDOS) local density of states in the optical range. For example, nanoparticles doped with rare-earth elements like europium or terbium provide both electric dipolar (ED) and magnetic dipolar (MD) transitions. In this theoretical article, we develop a quantum description of active systems (rare earth ions) coupled to a photonic nanostructure, by solving the optical Bloch equations together with Maxwell's equations. This allows us to access the population of the emitting energy levels for all atoms excited by the incident light, degenerated at the extremity of the tip of a near-field optical microscope. We show that it is possible to describe the collected light intensity due to ED and MD transitions in a scanning configuration. By carrying out simulations on different experimentally interesting systems, we demonstrate that our formalism can be of great value for the interpretation of experimental configurations including various external parameters (laser intensity, polarization and wavelength, the SNOM probe size, the nature of the sample ...).

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“…Moreover, nanoscale resonators provid so-called Purcell effect [99,119,137,138], when the power radiated by a quantum light source (atom, molecula, quanum dot, etc.) is enhanced due to the increase of the local density of states (LDOS).…”

Section: Surface Enhanced Spectroscopy and Sensingmentioning

confidence: 99%

All-Dielectric Nanophotonics: Fundamentals, Fabrication, and Applications

Krasnok¹,

Savelev²,

Baranov³

et al. 2017

World Scientific Handbook of Metamaterials and Plasmonics

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In this Article, we review a novel, rapidly developing field of modern light science named alldielectric nanophotonics. This branch of nanophotonics is based on the properties of high-index dielectric nanoparticles which allow for controlling both magnetic and electric responses of a nanostructured matter. Here, we discuss optical properties of high-index dielectric nanoparticles, methods of their fabrication, and recent advances in practical applications, including the quantum source emission engineering, Fano resonances in all-dielectric nanoclusters, surface enhanced spectroscopy and sensing, coupled-resonator optical waveguides, metamaterials and metasurfaces, and nonlinear nanophotonics.

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Modifying magnetic dipole spontaneous emission with nanophotonic structures

Cited by 130 publications

References 164 publications

Active Nanophotonics

Active Nanophotonics

Quantum theory of near-field optical imaging with rare-earth atomic clusters

All-Dielectric Nanophotonics: Fundamentals, Fabrication, and Applications

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