Broadband characterization of congruent lithium niobate from mHz to optical frequencies
| Autor: | Alexei Halpin, Torsten Granzow, Charlotte Cochard, Thiemo Spielmann, Naoufal Bahlawane |
|---|---|
| Přispěvatelé: | Photonics and Semiconductor Nanophysics |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Lithium niobate 02 engineering and technology Low frequency 01 natural sciences chemistry.chemical_compound Optics Ellipsometry 0103 physical sciences 010302 applied physics Birefringence birefringence business.industry lithium niobate 021001 nanoscience & nanotechnology Condensed Matter Physics Piezoelectricity Ferroelectricity Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Intermediate frequency 0210 nano-technology business Refractive index dielectric dispersion |
| Zdroj: | Journal of Physics D: Applied Physics, 50, 36LT01 Journal of Physics D: Applied Physics, 50(36):36LT01. Institute of Physics |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/1361-6463/aa80b8 |
| Popis: | Lithium niobate (LiNbO3) is a well known uniaxial ferroelectric material. Using impedance measurement, quasi-optical free-space characterization, THz time domain spectroscopy (THz-TDS) and ellipsometry, its dielectric permittivity/refractive index was characterized depending on the crystal orientation over a broad frequency range: 1 mHz to 1 PHz (lambda = 300 nm). Three different frequency ranges, separated by well identified resonances, are observed: low frequency 'free-piezoelectric' response, intermediate frequency 'clamped-ionic' response and high frequency 'electronic' response. These features are discussed with an emphasis on the role of the crystallographic structure and piezoelectric response. |
| Databáze: | OpenAIRE |
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