Near field sensor with cantilever and tip containing optical path for an evanescent wave
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United States of America Patent
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Jun 23, 1998
Grant Date -
N/A
app pub date -
Feb 23, 1996
filing date -
Jul 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The disclosed optical device includes a probe which is integrally supported on a cantilever which defines an optical path extending to an external device which may carry an optical processor. In a preferred embodiment the device has an optical path which is capable of guiding an evanescent wave to the external device. The device overcomes a problem with prior art Scanning Tunnelling Microscopes in that, by utilizing evanescent waves, it enables access to the so called mesoscopic range between approximately 1.times.10.sup.-10 m.rarw.50.times.10.sup.-10 m (1.ANG.-50.ANG.). In an alternative embodiment the invention permits manipulation of microscopic particles by utilising the probe. The probe may also act as a sensor.
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