Second-harmonic generation in a near-field optical-fiber probe.
Second-harmonic generation (SHG) in a near-field optical-fiber probe was observed. The tip of the probe consists of a triple-tapered fiber with an aluminum coating. For a fiber probe with an aperture size of 100 nm, the SHG conversion factor was 2.0 x 10(-11)cm(2)/W , which is as large as that of a 5-mm KDP crystal. In a probe-to-probe experiment, we demonstrated that SHG took place at the aluminum coating on the fiber probe.
Kawazoe
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Shimizu
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Ohtsu
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