Mutual coherence and conical pattern of sources optimally excited within multilayer optics

Amra, Claude; Maure, Sophie

doi:10.1364/josaa.14.003114

Cited by 37 publications

(36 citation statements)

References 18 publications

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“…Such cavity-based features of nonresonant disorder have been observed and modeled only in the small cavity finesse case ͑thin films͒. 15,16 First consider resonantly excited excitons in 2D quantum wells: one deals with a quasi-two-dimensional electronic system, in which ideally elastically scattered excitons lie on a constant energy ring in k space. However, multiple scattering leads to a randomization of the scattered photon wave vector, with energy being conserved only between initial and final photon states.…”

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confidence: 99%

Coherence effects in light scattering of two-dimensional photonic disordered systems: Elastic scattering of cavity polaritons

et al. 2000

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Resonant scattering by cavity polaritons in a semiconductor microcavity is investigated. The bidimensional photonic behavior is well shown by the angular spread of the Rayleigh scattered light on the elastic cone. Moreover, the strong coupling between the excitonic oscillator and the cavity mode enables the simultaneous observation of both ͑i͒ universal properties of disordered systems such as coherent backscattering over a large angular width, and ͑ii͒ scattering anisotropy due to the microscopic nature of the scatterer.Interference and coherence effects in elastic light scattering from disordered systems have been the focus of wide interest due to their importance in many domains of physics. 1 They have also been revived by the analogies that could be made with theories and experiments developed for the propagation of electrons in disordered systems, such as the weak and strong localization regimes. 2 For electron systems, such studies have been seen as direct evidence of the quantum nature of the electron and resulted in the breakdown of classical transport descriptions such as the diffusion equation or the Boltzmann equation.For photons, coherence effects also led to the reexamination of radiative transfer equations. 1 Of paramount importance was the observation for electrons or photons of weak localization in the form of coherent backscattering ͑CBS͒, which provides an unambiguous signature of phase coherence in the system. 1 The latter experiments are usually carried out in a large variety of physical systems ͑thin films, dielectric spheres, rods, etc.͒, where the disorder is due to fluctuations of the real part of the effective refraction index originating in either composition or size fluctuations of the scatterers. These systems allow one to adjust the scatterer density to yield a favorable ratio of light wavelength () to light mean free path (l*). 3 In other light scattering experiments the light frequency is resonant with an elementary electronic excitation. In such studies the disorder being observed is the one acting on the resonant electronic excitations. 4-8 The light reemitted by the system consists of ͑i͒ a coherent, elastic part due to static disorder, called resonant Rayleigh scattering ͑RRS͒; ͑ii͒ an incoherent, elastic part called resonant hot luminescence, involving inelastic scattering events such as phonon scattering; ͑iii͒ partially or completely thermalized contributions called photoluminescence ͑PL͒. These emissions yield information on the energy level scheme and nature of these levels, as well as on their dynamics. This is well demonstrated in twodimensional ͑2D͒ semiconductor quantum wells ͑QW's͒: early work on RRS demonstrated exciton localization effects and the existence of a mobility edge 9 while more recent studies dealt with the dynamics of RRS, 10,11 and the speckle spectroscopy of disorder. 12 In this paper, we report on resonant elastic light scattering in a 2D system where the light-matter interaction is in the strong-coupling regime. We use semiconductor microcavities, whe...

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confidence: 99%

Coherence effects in light scattering of two-dimensional photonic disordered systems: Elastic scattering of cavity polaritons

et al. 2000

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“…with σ g,m a modal spatial pulsation. From the admittance formalism we note that [50,51] the modal spatial pulsations σ g,m are the real poles of the reflection factor r(σ ) of the dielectric multilayer extended at higher frequencies (above the free-space limit), that is, 1/r(σ g,m ) = 0, and that these poles (when they exist) lie in the frequency range given by…”

Section: A Propagating and Evanescent Fields At Surfaces Of Periodicmentioning

confidence: 99%

Excitation of Bloch Surface Waves in Zero-Admittance Multilayers for High-Sensitivity Sensor Applications

et al. 2020

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The growing need for classical as well as quantum optical sensing places increasingly stringent requirements upon the desired characteristics of the engendered fields. Specifically, achieving superior field enhancement plays a critical role in applications ranging from chem-bio sensing, Raman and infrared spectroscopies to ion trapping and qubit control in emerging quantum-information science. Due to their low optical losses and ability to exhibit resonant field enhancements, all dielectric multilayers are emerging as an optical material system not only useful to classical photonics and sensing but also of potential to be integrated with quantum materials and quantum sensing. The recently introduced concept of zeroadmittance layers [1] within dielectric multilayer materials, enables the creation and control of resonant fields orders of magnitude larger than the exciting field. Here, invoking the zero-admittance concept, we design, fabricate, and characterize an all-dielectric nonabsorbing stack and demonstrate the engendered huge field enhancement. Describing the fields in terms of Bloch surface waves, we connect the surface field to the semiperiodicity in the dielectric domains of the stack. As a specific application of the resonant field, we propose and demonstrate refractive-index sensing for the detection of trace amounts of an analyte. The results include a quantification of the sensitivity of the device with respect to the profile of the exciting field. The experimental results are shown to be in good agreement with theoretical calculations.

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“…This formula is valid in the case of single surfaces and can be generalized to simple correlated coatings, but suffers from limitations which have been overcome with the development of electromagnetic theories [4,6,16,17]. Some key points to consider are to take into account the polarization and to access to the angular repartition of the scattered intensity.…”

Section: Chania Greece 9 -12 October 2018mentioning

confidence: 99%

Analysis and control of light scattered by optical components for space applications

Zerrad

Lequime

Amra

2019

International Conference on Space Optics — ICSO 2018

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Space applications require more and more demanding optical functions. This evolution led to the development of new generation of optical components with extreme performances in terms of scattering level, roughness, localized defects, spectral evolution of performances, coherent backscattering…. In this context, optical components produced for space applications present an increasing complexity with extreme specifications. As a consequence, new problematics specific to this generation of components appeared and among these, the management of light scattered by these components remains a significant challenge. For example, for complex optical coatings (typically with more than 100 interfaces), the scattering response of the component is not directly correlated to the substrate spectrum, as it is the case for simple coatings (less than 40 layers). For this reason, an accurate modelling of light scattered by complex optical coatings requires a global analysis taking into account different parameters from the design and manufacturing to the conditions of use of the component. We will present in this paper the last developments performed by the Scattering Group of Institut Fresnel for the modelling and the metrology of light scattered by complex optical components for space applications. A specific care will be given to recent studies performed on narrow band filters for earth observation and high performances mirrors. For each of these applications, the specific problematics and corresponding challenges will be presented and experimental and numerical results will be detailed. The agreement between metrology and modelling will be highlighted.

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Mutual coherence and conical pattern of sources optimally excited within multilayer optics

Cited by 37 publications

References 18 publications

Coherence effects in light scattering of two-dimensional photonic disordered systems: Elastic scattering of cavity polaritons

Coherence effects in light scattering of two-dimensional photonic disordered systems: Elastic scattering of cavity polaritons

Excitation of Bloch Surface Waves in Zero-Admittance Multilayers for High-Sensitivity Sensor Applications

Analysis and control of light scattered by optical components for space applications

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