Enhancement of electron-wave reflection by superlattices with multiple stacks of multiquantum barriers

Shun-Tung Yen*, Chia-Ming Tsai, C. P. Lee, D. C. Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We report a superlattice (SL) with multiple stacks of multiquantum barriers (MQB), which can reflect electrons more effectively than with a single stack of MQB. The reflectivities are calculated and compared with one another for a variety of potential barrier structures. The multistack SL has a wider energy spectrum within which electrons are reflected. Four types of n-GaAs/i-barrier/n-GaAs diodes were fabricated to confirm the calculated results. The current-voltage characteristics measured at 77 K for these diodes show that the turn-on voltage increases with the number of stacks of MQBs in the SL. This is in agreement with our calculated results.

Original languageEnglish
Pages (from-to)1108-1110
Number of pages3
JournalApplied Physics Letters
Volume64
Issue number9
DOIs
StatePublished - 1 Dec 1994

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