@article{article, title = {{Evidence for population inversion in excited electron states of a double barrier resonant tunneling structure}}, publisher = {{AIP Publishing}}, url = {{}}, year = {{1994}}, month = {{5}}, author = {{Cockburn JW and Skolnick MS and Whittaker DM and Buckle PD and Willcox ARK and Smith GW}}, doi = {{10.1063/1.111627}}, volume = {{64}}, journal = {{Applied Physics Letters}}, issue = {{18}}, pages = {{2400-2402}}, note = {{Accessed on 2025/06/27}}}