TY - JOUR T1 - Improved performance of In0.6Ga0.4As/AlAs0.67Sb0.33/InP quantum cascade lasers by introduction of AlAs barriers in the active regions JO - APPL PHYS LETT PY - 2007/07/30 AU - Revin DG AU - Cockburn JW AU - Steer MJ AU - Airey RJ AU - Hopkinson M AU - Krysa AB AU - Wilson LR AU - Menzel S ED - DO - DOI: 10.1063/1.2767767 VL - 91 IS - 5 Y2 - 2024/12/23 ER -