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Photoexcited Coherent Tunneling in a Double-Barrier SuperlatticeChoi, K. K.; Levine, B. F.; Bethea, C. G.; Walker, J.; Malik, R. J. · Physical Review Letters · 1987
Infrared photoelectron tunneling spectroscopy of strongly coupled quantum wellsChoi, K. K.; Levine, B. F.; Bethea, C. G.; Walker, J.; Malik, R. J. · Physical Review B · 1989
Tunneling lifetime broadening of the quantum well intersubband photoconductivity spectrumLevine, B. F.; Bethea, C. G.; Choi, K. K.; Walker, J.; Malik, R. J. · Applied Physics Letters · 1988
Quantum well avalanche multiplication initiated by 10 μm intersubband absorption and photoexcited tunnelingLevine, B. F.; Choi, K. K.; Bethea, C. G.; Walker, J.; Malik, R. J. · Applied Physics Letters · 1987
Strong 8.2 μm infrared intersubband absorption in doped GaAs/AlAs quantum well waveguidesLevine, B. F.; Malik, R. J.; Walker, J.; Choi, K. K.; Bethea, C. G.; Kleinman, D. A.; Vandenberg, J. M. · Applied Physics Letters · 1987