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Recording of optical near fields in remote locations by near-field holography
Optics Letters, 2001We propose a method of near-field recording in a space that is quite apart from the original source (generator) of optical near fields. The method is based on the recently developed technique of near-field holography. Experiments based on our method have shown that near fields that originate from sub-diffraction-limit-sized objects can be stored in a ...
K Y, Kim, B, Lee
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Resolution of near-field to near-field imaging with silver nanolayer
SPIE Proceedings, 2013Interest in plasmonic lenses dates back to the seminal paper of Pendry [Phys. Rev. Lett. 85, 3966 (2000)] who has shown that superresolution is possible due to imaging through a negative-refractive-index material. Experimental verifications of near-field to near-field imaging properties of a single Ag nanolayer have proven that a resolution reaching ...
Tomasz Stefaniuk +3 more
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Near-field ultrasound tomography
The Journal of the Acoustical Society of America, 2007In this paper, a near-field tomographic solution is introduced to solve the imaging problem of fluid objects assumed to be weakly heterogeneous (Born approximation) and excited by spherical waves. The solution to the forward problem is based on the Huygens-Fresnel principle which describes the scattered field as the result of the interference scheme of
Serge, Mensah, Emilie, Franceschini
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Terahertz spectroscopy in the near field
Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion, 2007We observe a terahertz field enhancement in the junction between a sub-wavelength metal probe tip and a metallic substrate. We exploit this in the first observation of a metal-insulator transition using terahertz near-field techniques.
Zhan, Hui +7 more
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Physical Review Letters, 1996
Near-field optical holography, i.e., a technique that allows one to record and reconstruct not only far- but also near-field components of optical fields, is conceptually formulated. A near-field hologram can be recorded with a reference wave, which is totally internally reflected by a surface with quasi-two-dimensional objects on it, and reconstructed
, Bozhevolnyi, , Vohnsen
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Near-field optical holography, i.e., a technique that allows one to record and reconstruct not only far- but also near-field components of optical fields, is conceptually formulated. A near-field hologram can be recorded with a reference wave, which is totally internally reflected by a surface with quasi-two-dimensional objects on it, and reconstructed
, Bozhevolnyi, , Vohnsen
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Near-field diffractive elements
Optics Letters, 2005A novel near-field imaging system is proposed and simulated. It is seen that a significant improvement in performance in the presence of noise is possible without loss of resolution.
Daniel, Marks, P Scott, Carney
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Near-field degree of polarization
SPIE Proceedings, 2003We investigate an extension of the concept of degree of polarization for arbitrary electromagnetic fields, i.e., fields whose wave structure is not necessarily planar. We show how this formulation relates the degree of polarization to the correlations between the three orthogonal components of the electric field.
Tero Setala +3 more
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Continuation of acoustic near-fields
The Journal of the Acoustical Society of America, 2003This paper deals with the analytic continuation of a coherent pressure field specified on a finite sheet located close to and conformal to the surface of a vibrator. This analytic continuation is an extension or extrapolation of the given (measured) field into a region outside and tangential to the original finite sheet, and is based on the Green’s ...
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Nanogap near-field thermophotovoltaics
Nature Nanotechnology, 2018Conversion of heat to electricity via solid-state devices is of great interest and has led to intense research of thermoelectric materials1,2. Alternative approaches for solid-state heat-to-electricity conversion include thermophotovoltaic (TPV) systems where photons from a hot emitter traverse a vacuum gap and are absorbed by a photovoltaic (PV) cell ...
Anthony Fiorino +5 more
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Near field superdirectivity (NFSD)
Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 2002In some array applications, the source of interest is close to the array, so that we have to use a near-field model. Almost always the near-field is considered as an additional difficulty. We contradict this point of view and show that if the desired source is in the near-field and the other sources are in the far-field, then even a small array can be ...
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