Title :
Sequential vs. coherent tunneling in double barrier diodes investigated by differential absorption spectroscopy
Author :
Woodward, T.K. ; Chemla, D.S. ; Bar-Joseph, I. ; Baranger, H.U. ; Sivco, D.L. ; Cho, A.Y.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
Abstract :
The charge distributions in the quantum wells of several double barrier diodes were measured. It is found that the ratio of the stored charge to the current is not equal to the coherent state lifetime and is basically insensitive to the amount of scattering. It was experimentally demonstrated that phase breaking collisions take place in the present structures by observing the energy distribution of the stored charge in both single and double resonance structures.<>
Keywords :
resonant tunnelling devices; tunnel diodes; tunnelling; RTD; charge distributions; coherent state lifetime; coherent tunneling; current; differential absorption spectroscopy; double barrier diodes; energy distribution; phase breaking collisions; quantum wells; sequential tunnelling; stored charge; Charge measurement; Current measurement; Diodes; Particle scattering; Resonance; Tunneling;
Conference_Titel :
Electron Devices Meeting, 1990. IEDM '90. Technical Digest., International
Conference_Location :
San Francisco, CA, USA
DOI :
10.1109/IEDM.1990.237081
