| Title | Terahertz Radiation from Nonpolar InN Due to Drift in an Intrinsic In-Plane Electric Field |
| Publication Type | Journal Article |
| Year of Publication | 2010 |
| Authors | Metcalfe, G. D., H. Shen, M. Wraback, G. Koblmüller, C. Gallinat, F. Wu, and J. S. Speck |
| Journal | Applied Physics Express |
| Volume | 3 |
| Pagination | 092201 |
| Abstract | A sinusoidal dependence of the s- and p-polarized terahertz (THz) emission on sample rotation angle in m - and a -plane InN has been observed using ultrafast pulse excitation at a moderate pump fluence of ∼1 µJ/cm 2 . The angular dependence is attributed to carrier drift in an intrinsic in-plane electric field parallel to the c -axis induced by stacking fault-terminated internal polarization at wurtzite domain boundaries, with a THz polarity flip corresponding to a reversal of the c -axis. The p-polarized THz signal also consists of an angular-independent component, similar to that from c -plane InN, consistent with surface normal transport due to the photo-Dember effect. |
| URL | http://stacks.iop.org/1882-0786/3/i=9/a=092201 |
