Publication

Near-field optical microscopy: Contrast mechanisms in standard systems and photonic band gap structures

1999
Conference Papers

Abstract

We discuss some of the intrinsic difficulties related to the numerical investigation of near-held optical microscopy. We show how these difficult ies can be handled within the framework of the Green's tensor technique. Investigating practical experimental configurations, we show the strong correlation between the motion of the tip and the near-field signal. In order to investigate this kind of artifacts, we propose a series of experiments based on photonic band gap systems immersed in evanescent fields. The electromagnetic properties of such a system can be changed without changing the the topography of the system at all.

Official source

https://infoscience.epfl.ch/entities/publication/7de37162-d41d-4b96-aa5e-c1ca18a809bb

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1999
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7de37162-d41d-4b96-aa5e-c1ca18a809bb

About this result

Related concepts (32)

Near-field scanning optical microscope

Near-field scanning optical microscopy (NSOM) or scanning near-field optical microscopy (SNOM) is a microscopy technique for nanostructure investigation that breaks the far field resolution limit by exploiting the properties of evanescent waves. In SNOM, the excitation laser light is focused through an aperture with a diameter smaller than the excitation wavelength, resulting in an evanescent field (or near-field) on the far side of the aperture.

Transmission electron microscopy

Transmission electron microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an image. The specimen is most often an ultrathin section less than 100 nm thick or a suspension on a grid. An image is formed from the interaction of the electrons with the sample as the beam is transmitted through the specimen. The image is then magnified and focused onto an imaging device, such as a fluorescent screen, a layer of photographic film, or a sensor such as a scintillator attached to a charge-coupled device.

Correlation

In statistics, correlation or dependence is any statistical relationship, whether causal or not, between two random variables or bivariate data. Although in the broadest sense, "correlation" may indicate any type of association, in statistics it usually refers to the degree to which a pair of variables are linearly related. Familiar examples of dependent phenomena include the correlation between the height of parents and their offspring, and the correlation between the price of a good and the quantity the consumers are willing to purchase, as it is depicted in the so-called demand curve.

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Near-field optical microscopy: Contrast mechanisms in standard systems and photonic band gap structures

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