In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 38, No. 12R ( 1999-12-01), p. 6721-
Abstract:
The second-harmonic generation (SHG) interferometry technique has to date been used
to determine the phase of second-harmonic (SH) light generated in a single polarization combination of a polarizer and an analyzer. However, it is not easy to compare phases of the
SH light generated by a plural polarization combination, because a thick local oscillator, such as an α-quartz single crystal, has several disadvantages for this purpose. The birefringence
and optical rotatory power of the quartz crystal often require further consideration on the phase relation of the SH lights with different polarizations. Thus, the full determination of
the complex χ-components of an organic ultrathin film by the use of the quartz crystal is impractical. After surveying SH active systems, we found that a 2-docosylamino-5-nitropyridine (DCANP) Langmuir-Blodgett (LB) film is the most applicable for the phase
measurements. A few nanometers-thick DCANP LB film, which is much thinner than the
wavelength of the SH light, yields a negligible phase delay even if birefringence is present. The SHG efficiency of the film can be easily controlled by changing
the number of layers. Some experimental results are addressed to demonstrate the advantage
of the DCANP LB film as a local oscillator.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.38.6721
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1999
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
Permalink