In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 40, No. 9R ( 2001-09-01), p. 5450-
Kurzfassung:
We have constructed an optical fiber system for collecting light emission (LE) from the gap between a sample and the tip of a scanning tunneling microscope (STM). The collection system consists of four optical fibers with a core diameter of 600 µm and a numerical aperture (NA) of 0.2. The four optical fibers point radially at the tip-sample gap from four directions. To demonstrate the performance of the collection system, we evaluated its effective solid angle of collection by measuring the STM-LE from a Au evaporated film. The effective solid angle was estimated to be 0.33±0.03 sr, which corresponds to about 2.6 times that of a single optical fiber determined by the NA (0.13 sr). Although the solid angle of collection did not increase by a factor of four, the increase of the collection solid angle will improve the detection limit by reducing the accumulation time for spectral measurements.
Materialart:
Online-Ressource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.40.5450
Sprache:
Unbekannt
Verlag:
IOP Publishing
Publikationsdatum:
2001
ZDB Id:
218223-3
ZDB Id:
797294-5
ZDB Id:
2006801-3
ZDB Id:
797295-7
