Surface-enhanced second-harmonic generation of optical beams from a metal surface

Li, Guifang; Seshadri, S. R.

doi:10.1103/physrevb.44.1240

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…SHG is also a sensitive probe of surfaces and interfaces as they intrinsically break inversion symmetry. Studies include those of surfaces and domain walls in ferroelectrics, melting of metal surfaces, catalytic processes, liquid crystals, biological surfaces, and many more. The SHG processes that involve the magnetic field of light are typically weaker; however, they can be sensitive to time reversal symmetry, and hence to the magnetic structure of materials.…”

Section: Introductionmentioning

confidence: 99%

Probing Ferroelectrics Using Optical Second Harmonic Generation

Denev

Lummen

Barnes

et al. 2011

Journal of the American Ceramic Society

301

307

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Nonlinear optics is an essential component of modern laser systems and optoelectronic devices. It has also emerged as an important tool in probing the electronic, vibrational, magnetic, and crystallographic structure of materials ranging from oxides and metals, to polymers and biological samples. This review focuses on the specific technique of optical second harmonic generation (SHG), and its application in probing ferroelectric complex oxide crystals and thin films. As the dominant SHG interaction mechanism exists only in materials that lack inversion symmetry, SHG is a sensitive probe of broken inversion symmetry, and thus also of bulk polar phenomena in materials. By performing in-situ SHG polarimetry experiments in different experimental conditions such as sample orientation, applied electric field, and temperature, one can probe ferroelectric hysteresis loops and phase transitions. Careful modeling of the polarimetry data allows for the determination of the point group symmetry of the crystal. In epitaxial thin films with a two-dimensional arrangement of well-defined domain orientations, one can extract information about intrinsic material properties such as nonlinear coefficients, as well as microstructural information such as the local statistics of the different domain variants being probed. This review presents several detailed examples of ferroelectric systems where such measurements and modeling are performed. The use of SHG microscopic imaging is discussed, and its ability to reveal domain structures and phases not normally visible with linear optics is illustrated.

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Section: Introductionmentioning

confidence: 99%

Probing Ferroelectrics Using Optical Second Harmonic Generation

Denev

Lummen

Barnes

et al. 2011

Journal of the American Ceramic Society

301

307

View full text Add to dashboard Cite

show abstract

“…The experimentally observed SHG enhancement in the high laser intensities could be attributed fully or partly to other possible effects, such as continuum generation with su- Reference [Gui91] focuses on a theoretical calculation concerning the second harmonic enhancement due to interaction between a laser beam and a corrugated metallic surface with sinusoidal profile. This effect does not apply to our data since we use a mirror-like surface and the polishing process of this surface avoids any defects as was described in the previous chapter.…”

Section: M) + M -R)mentioning

confidence: 99%