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Polarization-dependent below band-gap optical absorption of aluminum nitride bulk crystals
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10.1063/1.2903139
/content/aip/journal/jap/103/7/10.1063/1.2903139
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/7/10.1063/1.2903139
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic drawing of a linear polarized light beam hitting a wurtzite crystal at different orientations. Left: plane, Middle: plane, and right: 6° off-oriented (0001) plane. In all shown configurations, the polarization direction . These configurations are defined as . In the experiment, is varied by sample rotation while the beam retains its polarization direction.

Image of FIG. 2.
FIG. 2.

Optical absorption spectra of AlN samples measured at (, thin lines) and (thick lines). (a) (0001)-cut sample, (b) 6° off-axis (0001)-cut sample, (c) -cut sample, and [(d)–(f)] different -cut samples. The spectra are vertically shifted for better visibility. For each spectrum, the zero absorption level is indicated by an arrow. The vertical dashed line indicates the position of the absorption peak.

Image of FIG. 3.
FIG. 3.

Dependence of the absorption coefficient at on the sample rotation angle of the AlN samples (a)–(f) as of Fig. 2. Graph (a) is shifted down by for better visibility. Dots represent measurement points. Lines represent best fits to Malus’ law calculated from Eq. (2).

Image of FIG. 4.
FIG. 4.

Dependence of the absorption coefficient on the sample rotation angle for selected wavelengths of the -cut AlN sample (d) as of Fig. 2. Dots represent measurement points. Lines represent best fits to Malus’ law calculated from Eq. (2).

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/content/aip/journal/jap/103/7/10.1063/1.2903139
2008-04-09
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polarization-dependent below band-gap optical absorption of aluminum nitride bulk crystals
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/7/10.1063/1.2903139
10.1063/1.2903139
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