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. 2018 Jun 27;8:9765. doi: 10.1038/s41598-018-28136-z

Figure 2.

Figure 2

Photoluminescence (PL) intensity calibration as a function of SiNx thickness. The PL in counts per second (CPS) was measured by the APD during laser-exposure (488 nm, 30 µW) for 6 chips of different membrane thickness. Prior to the PL measurements, the membrane thickness was measured by ellipsometry. Thicker membranes result in higher PL.