Let's say I am to receive a bunch of lithium niobate wafers, Y-127 cut.

There's a wafer flat which indicates the direction of the X-axis. However the wafer still has a top and bottom. Since we're working with a rotated cut, the wafer surface is not a crystallographic mirror plane.

How do I easily determine which orientation the wafer has? I have access to some basic optic and electrical components.

  • 1
    $\begingroup$ The easiest would be a diffractometer. $\endgroup$
    – Jon Custer
    Nov 11, 2022 at 12:11
  • $\begingroup$ Had a brainwave: I'm going to try simply lightly compressing it between two conductive surfaces and measuring the piezo voltage polarity with an oscilloscope or even a multimeter. Will add an answer if it works. $\endgroup$
    – Sanchises
    Nov 12, 2022 at 9:00


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