论文信息 - Tunable Bulk Acoustic Reflection Gratings in Neodymium Pentaphosphate

Tunable Bulk Acoustic Reflection Gratings in Neodymium Pentaphosphate

This paper presents a newly-discovered tunable bulk a coustic wave reflection grating in neodymium pentaphosphate (NPP). The arrays consist of a uniformly periodic array of ferroelastic domain walls which extend through the bulk of a single c rystal of NPP. The calculated amplitude reflection coefficient of a longitudinal acoustic wave from a single "a"-type domain wall is 6.06% at normal incidence. These arrays may be tuned from 100 to 0.5 micron p eriods. Experimental and theoretical r esults are given of the reflection coefficient versus f requency for 74.8

B. Auld | S. Meeks | L. Clarke

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