Setup of a scanning near field infrared microscope (SNIM): Imaging of sub-surface nano-structures in gallium-doped silicon

2006 ◽  
Vol 8 (6) ◽  
pp. 753-758 ◽  
Author(s):  
Jean-Sébastien Samson ◽  
Götz Wollny ◽  
Erik Bründermann ◽  
Andreas Bergner ◽  
Andreas Hecker ◽  
...  
Keyword(s):  
Near Field ◽  
Nano Structures ◽  
Doped Silicon ◽  
Infrared Microscope

Application Conditions of Effective Medium Theory in Near-Field Radiative Heat Transfer Between Multilayered Metamaterials

2014 ◽  
Vol 136 (9) ◽  
Author(s):  
X. L. Liu ◽  
T. J. Bright ◽  
Z. M. Zhang
Keyword(s):  
Heat Transfer ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Effective Medium Theory ◽  
Near Field ◽  
Effective Medium ◽  
Medium Theory ◽  
Metal Metal ◽  
Doped Silicon ◽  
Silicon And Germanium

This work addresses the validity of the local effective medium theory (EMT) in predicting the near-field radiative heat transfer between multilayered metamaterials, separated by a vacuum gap. Doped silicon and germanium are used to form the metallodielectric superlattice. Different configurations are considered by setting the layers adjacent to the vacuum spacer as metal–metal (MM), metal–dielectric (MD), or dielectric–dielectric (DD) (where M refers to metallic doped silicon and D refers to dielectric germanium). The calculation is based on fluctuational electrodynamics using the Green's function formulation. The cutoff wave vectors for surface plasmon polaritons (SPPs) and hyperbolic modes are evaluated. Combining the Bloch theory with the cutoff wave vector, the application condition of EMT in predicting near-field radiative heat transfer is presented quantitatively and is verified by exact calculations based on the multilayer formulation.

scholarly journals Scanning Near-Field Optical Microscopy

2008 ◽  
Vol 8 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Dušan Vobornik ◽  
Slavenka Vobornik
Keyword(s):  
Molecular Structure ◽  
Chemical Composition ◽  
Optical Microscopy ◽  
Temporal Resolution ◽  
Dynamic Properties ◽  
Near Field ◽  
Medical Sciences ◽  
Human Eye ◽  
Nano Structures

An average human eye can see details down to 0,07 mm in size. The ability to see smaller details of the matter is correlated with the development of the science and the comprehension of the nature. Today’s science needs eyes for the nano-world. Examples are easily found in biology and medical sciences. There is a great need to determine shape, size, chemical composition, molecular structure and dynamic properties of nano-structures. To do this, microscopes with high spatial, spectral and temporal resolution are required. Scanning Near-field Optical Microscopy (SNOM) is a new step in the evolution of microscopy. The conventional, lens-based microscopes have their resolution limited by diffraction. SNOM is not subject to this limitation and can offer up to 70 times better resolution.

scholarly journals Optical Fibre Micro/Nano Tips as Fluorescence-Based Sensors and Interrogation Probes

Optics ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 213-242 ◽  
Author(s):  
Simone Berneschi ◽  
Andrea Barucci ◽  
Francesco Baldini ◽  
Franco Cosi ◽  
Franco Quercioli ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Optical Fibre ◽  
Near Field ◽  
Optical Devices ◽  
Biochemical Sensors ◽  
Whispering Gallery ◽  
Biochemical Sensing ◽  
Nano Structures ◽  
Microscope Imaging ◽  
Physical And Chemical

Optical fibre micro/nano tips (OFTs), defined here as tapered fibres with a waist diameter ranging from a few microns to tens of nanometres and different tip angles (i.e., from tens of degrees to fractions of degrees), represent extremely versatile tools that have attracted growing interest during these last decades in many areas of photonics. The field of applications can range from physical and chemical/biochemical sensing—also at the intracellular levels—to the development of near-field probes for microscope imaging (i.e., scanning near-field optical microscopy (SNOM)) and optical interrogation systems, up to optical devices for trapping and manipulating microparticles (i.e., optical tweezers). All these applications rely on the ability to fabricate OFTs, tailoring some of their features according to the requirements determined by the specific application. In this review, starting from a short overview of the main fabrication methods used for the realisation of these optical micro/nano structures, the focus will be concentrated on some of their intriguing applications such as the development of label-based chemical/biochemical sensors and the implementation of SNOM probes for interrogating optical devices, including whispering gallery mode microcavities.

scholarly journals Fabrication of various micro/nano structures by modified near-field electrospinning

AIP Advances ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 041301 ◽  
Author(s):  
T. P. Lei ◽  
X. Z. Lu ◽  
F. Yang
Keyword(s):  
Near Field ◽  
Nano Structures

Near-Field Radiation Calculated With an Improved Dielectric Function Model for Doped Silicon

2008 ◽  
Author(s):  
S. Basu ◽  
B. J. Lee ◽  
Z. M. Zhang
Keyword(s):  
Energy Transfer ◽  
Dielectric Function ◽  
Near Field ◽  
Silicon Surfaces ◽  
Function Model ◽  
Fluctuation Dissipation ◽  
Doped Silicon ◽  
Energy Conversion Systems ◽  
Field Radiation ◽  
Vacuum Gap

This paper describes a theoretical investigation of near-field radiative heat transfer between doped silicon surfaces separated by a vacuum gap. Using an improved dielectric function model for heavily doped silicon, along with fluctuation-dissipation theorem, and dyadic Green’s function, the present authors calculated the energy transfer between the doped silicon surfaces near room temperature. The effects of doping level, polarization, and width of the vacuum gap on the overall radiative transfer were investigated. It was observed that increase in the doping concentration of the emitter does not necessarily enhance the energy transfer in the near field. The energy-streamline method was used to model the lateral shift of the energy pathway, which is the trace of the Poynting vectors in the vacuum gap. The analysis performed in this study may facilitate the understanding of near-field radiation for applications such as thermal management in nanoelectronics, energy conversion systems, and nanothermal manufacturing.

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