TY - JOUR T1 - Emission of collimated THz pulses from photo-excited semiconductors JO - Semiconductor Science and Technology PY - 2004/01/01 AU - Johnston MB AU - Dowd A AU - Driver R AU - Linfield EH AU - Davies AG AU - Whittaker DM ED - DO - DOI: 10.1088/0268-1242/19/4/147 VL - 19 IS - 4 SPEC. ISS. Y2 - 2024/12/23 ER -