Generation of terahertz radiation by bulk and surface optical rectification from crystal planes of arbitrary orientation

Authors

Stuart Hargreaves, University of Wollongong
Krunal Radhanpura, University of WollongongFollow
Roger A. Lewis, University of WollongongFollow

RIS ID

29856

Publication Details

Hargreaves, S., Radhanpura, K. & Lewis, R. A. (2009). Generation of terahertz radiation by bulk and surface optical rectification from crystal planes of arbitrary orientation. Physical Review B (Condensed Matter and Materials Physics), 80 (19), 195323-1-195323-16.

Abstract

The theory of second-order nonlinear bulk and third-order nonlinear surface electric-field-induced optical rectification is developed for zinc-blende 4¯3m crystal faces of arbitrary indices (hkl). The theory is then used to account for our experimental results for terahertz generation from GaAs high-index planes (11N)A and (11N)B, where N=2, 3, 4, and 5. The data combined with the calculations allow us to demonstrate that a surface field is present on both the Ga-rich and As-rich faces and to determine that the signs are opposite and that the strengths are similar. Such conclusions are inaccessible by work restricted to low-index planes.