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2002•Unpublished venueRequires access

Experimental investigation of the electromagnetic fields at the aperture of a near-field scanning optical microscope

R. S. Decca, Howard Dennis Drew, K.L. Emison, Sassan Tabatabaei

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Abstract

In this work we use an approach that allows a determination of the spatial distribution of the electromagnetic field in the near-field region of the near field scanning optical microscope (NSOM) probe. We studied a MBE grown sample, which contains a 9 nm AlAs layer embedded in a GaAs matrix. The optical contrast arises from the difference in the index of refraction of the two materials. Topography related contrast is avoided by studying a freshly cleaved surface. With the NSOM working in emission mode the reflected light was collected in the far field.

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What this paper is about

In this work we use an approach that allows a determination of the spatial distribution of the electromagnetic field in the near-field region of the near field scanning optical microscope (NSOM) probe. We studied a MBE grown sample, which contains a 9 nm AlAs layer embedded in a GaAs matrix. The optical contrast arises from the difference in the index of refraction of the two materials. Topography related contrast is avoided by studying a freshly cleaved surface. With the NSOM working in emission mode the reflected light was collected in the far field.

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Available abstract

In this work we use an approach that allows a determination of the spatial distribution of the electromagnetic field in the near-field region of the near field scanning optical microscope (NSOM) probe. We studied a MBE grown sample, which contains a 9 nm AlAs layer embedded in a GaAs matrix. The optical contrast arises from the difference in the index of refraction of the two materials. Topography related contrast is avoided by studying a freshly cleaved surface. With the NSOM working in emission mode the reflected light was collected in the far field.

Key concepts: Near-field scanning optical microscope, Optical microscope, Optics, Materials science, Near-field optics, Refractive index, Electromagnetic field, Aperture (computer memory)

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