Download Waveguide Spectroscopy of Thin Films by Alexander Vasil'evich Khomchenko PDF

  • admin
  • March 28, 2017
  • Nanotechnology
  • Comments Off on Download Waveguide Spectroscopy of Thin Films by Alexander Vasil'evich Khomchenko PDF

By Alexander Vasil'evich Khomchenko

Show description

Read or Download Waveguide Spectroscopy of Thin Films PDF

Similar nanotechnology books

Nanotechnology-Enabled Sensors

Nanotechnology offers us with instruments to create sensible fabrics, units, and platforms via controlling fabrics on the atomic and molecular scales through utilising novel homes and phenomena. seeing that such a lot chemical and organic sensors, in addition to many actual sensors, depend upon interactions taking place in the nanoscale variety, the influence that nanotechnology could have at the sensor international is important.

Optical Generation and Control of Quantum Coherence in Semiconductor Nanostructures

The remarkable keep watch over of coherence that may be exercised in quantum optics of atoms and molecules has encouraged expanding efforts in extending it to solid-state platforms. One motivation to use the coherent phenomena comes from the emergence of the quantum info paradigm, notwithstanding many extra strength equipment functions starting from novel lasers to spintronics are all sure up with concerns in coherence.

Foundations of Nanomechanics: From Solid-State Theory to Device Applications

This article presents an creation, on the point of a complicated pupil in engineering or physics, to the sector of nanomechanics and nanomechanical units. It offers a unified dialogue of strong mechanics, with notation in line with glossy conference. A dialogue of electric transducer functions is incorporated, overlaying such themes as piezoresistance and piezoelecticity.

Transport Properties of Molecular Junctions

A finished review of the actual mechanisms that regulate electron delivery and the features of metal-molecule-metal (MMM) junctions. so far as attainable, tools and formalisms provided in other places to research electron shipping via molecules are kept away from. This identify introduces easy concepts--a description of the electron shipping via molecular junctions—and in brief describes appropriate experimental equipment.

Extra resources for Waveguide Spectroscopy of Thin Films

Example text

K 0 n 0 Fig. 5. Dependencies of n and k on frequency near to the fundamental frequency o0 of optical transitions. 26a) 0 ðoÞ À 1 ¼ vp p o02 À o2 0 Z 1 0 0 4ps 2o  ðo Þ À 1 ¼ vp 00 ðoÞ À do0 . 26a). 26b) are regarded as their principal values. The dispersion relation relating to the refractive index and the absorption coefficient is written as Z 1 0 2 o kðo0 Þ do. 28) where the singularity area is extracted. Note that at o ¼ o0 , lim o0 kðo0 Þ À okðoÞ kðoÞ 1 dk þ . ¼ 2o 2 do ðo0 Þ2 À o2 In the calculation of the refractive index the region of integration is split into four ranges:  from 1 to o1 , where kðoÞ is described by the Drude model;  from o1 to op, where the harmonic oscillator model is used;  in the frequency range from op to oh the approach based on the pol- ynomial approximation of the values kðoÞ, which are measured experimentally, is used; and  in the range from o ¼ oh to o ¼ 1, the asymptotic interpolation of ðoÞ is used for determining the k.

3. Input of Radiation into Waveguide by the Prism Coupler For the excitation of guided modes, directed by the film, the experimental techniques that use a prism coupler or a prism device of a tunnel excitation of modes are employed. This device provides the selective excitation of a certain mode. 1). 1) where gm is the incidence angle of radiation on the prism base and np the refractive index of the prism. The similar scheme depicted in Ref. [70]. The light beam with radius aw is directed onto the prism base.

1 mm. 01 mm. Hence, the role of losses caused by the scattering becomes less significant. In semiconductor waveguides, the losses caused by light absorption are usually quite significant and scattering is not so important. The absorption losses are related to the absorption near the band edge and to the absorption on the impurity or surface state levels. Such losses in waveguide are $10–200 dB/cm (or 2–50 cmÀ1) approximately. In case of film thickness less than 1 mm it is quite difficult to measure such great attenuation of light by non-waveguide methods.

Download PDF sample

Rated 4.04 of 5 – based on 42 votes