Journal
OPTICS LETTERS
Volume 43, Issue 16, Pages 4037-4040Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.004037
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- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
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We experimentally study the Goos-Hanchen shift of a focused Gaussian optical beam in the critical region of incidence. We directly measure the beam's shift evaluated from the displacement of the location of the beam's intensity peak and its centroid by a novel image analysis method. We verify that the evaluation method has a dramatic impact on the physics of beam shift phenomena. The influence of wave-length, beam waist, and propagation distance on the beam shift is studied. Our experimental results confirm recent theoretical predictions about the composite Goos-Hanchen shift, including the observation of negative shifts of the beam's intensity peak. (C) 2018 Optical Society of America
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