کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1813973 | 1025643 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Second harmonic generation in generalized Thue–Morse ferroelectric superlattices Second harmonic generation in generalized Thue–Morse ferroelectric superlattices](/preview/png/1813973.png)
In this paper the second harmonic generation (SHG) in generalized Thue–Morse (GTM(m, n)) ferroelectric superlattices is studied. Under the small-signal approximation, the SHG spectra in both real and reciprocal spaces are investigated. It is found that: (1) only when the structure parameters l , lAlA, and lBlB are all chosen to be proper, can SHG in GTM(m, n) ferroelectric superlattices be generated; (2) for Family A of generalized Thue–Morse, GTM(m, 1) ferroelectric systems, with the increase of parameter m , the intense peaks of SHG concentrate on the long wavelength 1.4–1.5μm (the fundamental beam (FB) wavelength is within 0.8–1.5μm), but for Family B of generalized Thue–Morse, GTM(1, n) ferroelectric superlattices, with the increase of parameter n , the intense peaks of SHG concentrate on the middle wavelength 1.1–1.2μm; and (3) for GTM(m, 1) ferroelectric superlattices, the bigger the m, the stronger the relative integral intensity (RII) of SHG would be, but for GTM(1, n) ferroelectric systems, the bigger the n, the weaker the RII of SHG would be.
Journal: Physica B: Condensed Matter - Volume 404, Issue 20, 1 November 2009, Pages 3425–3430