- Tytuł:
- Conversion excitation of intense sound fields in crystals
- Autorzy:
-
Alshits, V.
Bessonova, D.
Lyubimov, V.
Radowicz, A. - Powiązania:
- https://bibliotekanauki.pl/articles/127714.pdf
- Data publikacji:
- 2014
- Wydawca:
- Politechnika Poznańska. Instytut Mechaniki Stosowanej
- Tematy:
-
elastic wave
resonance reflection
conversion
pump wave
anisotropy
diffraction divergence
fala sprężysta
odbicie rezonansu
konwersja
fala pompująca
anizotropia
rozbieżność dyfrakcji - Opis:
- The resonant excitation of an intense elastic wave in a crystal is described through a special nonspecular reflection close to a conversion when almost all the energy from the incident pump wave falls into the near-surface narrow high-intensity reflected beam. The resonance arises when the excited reflected wave is close to the bulk eigenmode satisfying the condition of free boundary. It is shown that the choice of the crystal surface parallel to a symmetry plane allows simultaneous optimization of reflection geometry when the intensity maximum for the excited wave is accompanied by the intensity minimum for the other (parasite) reflected wave. And the conversion criterion of vanishing of the above minimum is determined by one definite condition on elastic moduli. On this basis the series of real monoclinic, orthorhombic and hexagonal crystals were chosen where the resonant reflection in non-symmetric sagittal planes proves to be very close to conversion.
- Źródło:
-
Vibrations in Physical Systems; 2014, 26; 13-20
0860-6897 - Pojawia się w:
- Vibrations in Physical Systems
- Dostawca treści:
- Biblioteka Nauki
Artykuł