Dieter W. Pohl

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A method for the fabrication of bow-tie optical antennas at the apex of pyramidal Si 3 N 4 atomic force microscopy tips is described. We demonstrate that these novel optical probes are capable of sub-wavelength imaging of single quantum dots at room temperature. The enhanced and confined optical near-field at the antenna feed gap leads to locally enhanced(More)
OBJECTIVE Many bariatric surgery programs include psychiatric evaluations as part of the pre-operative screening procedure. Surveys of surgeons and mental health professionals have found variability in opinion regarding what psychosocial problems warrant denial of clearance for surgery. Few studies have reported the number of patients who are not cleared(More)
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