Transverse magnetic field polarity effects on the terahertz radiation from GaAs/AlGaAs modulation-doped heterostructures with varying AlGaAs spacer-layer thickness - Estacio, Elmer; Sarukura, Nobuhiko; Ponseca, Carlito Jr; Somintac, Armando; Bailon-Somintac, Michelle; Garcia, Alipio; Salvador, Arnel (2008)