Near-field optical apparatus and method using photodetector array
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United States of America Patent
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May 18, 2010
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app pub date -
Nov 29, 2007
filing date -
Nov 30, 2006
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Abstract
An imaging-type near-field optical microscope mainly comprises a light source and a photodetector array. The array functions as imaging array where each cell or photodetector has subwavelength dimensions. A sample under test is disposed in optical near field of the photodetectors, e.g., on surface of the array. As a result of subwavelength dimensions and near-field effect, resolution can break the diffraction limit and even reach nanoscale. The microscope has a fast speed, works with soft sample and sample in solution, and is capable of dynamic observations. In addition, the array surface doubles as a platform for molecule manipulation.
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