TY - GEN
T1 - Regrowth of InAs on the sides of in-situ etched InAs/AlSb superlattices
AU - Kolasa, B.
AU - Savvidis, P.
AU - Ulrichs, E.
AU - Allen, S. J.
AU - Chow, D.
AU - Daniel, E.
N1 - Publisher Copyright:
© 2002 IEEE.
PY - 2002
Y1 - 2002
N2 - We propose to bias uniformly a superlattice by etching mesas of an InAs/AlSb superlattice in-situ and subsequently regrowing InAs on the sidewalls. A uniformly biased semiconductor superlattice produces a Stark ladder which can support gain for frequencies just below the Stark splitting. Since the Stark ladder can be easily tuned with the applied bias, the superlattice can be the basis for a terahertz frequency solid state oscillator. Unfortunately, charge accumulation, electric field instabilities, and electric field domain formation occur in superlattices. "Circuit models" of the domain formation suggest that a thin (4-40 nm) layer of InAs on the sidewall of a ∼1 μm wide InAs/AlSb mesa could suppress domain formation without compromising the gain at terahertz frequencies.
AB - We propose to bias uniformly a superlattice by etching mesas of an InAs/AlSb superlattice in-situ and subsequently regrowing InAs on the sidewalls. A uniformly biased semiconductor superlattice produces a Stark ladder which can support gain for frequencies just below the Stark splitting. Since the Stark ladder can be easily tuned with the applied bias, the superlattice can be the basis for a terahertz frequency solid state oscillator. Unfortunately, charge accumulation, electric field instabilities, and electric field domain formation occur in superlattices. "Circuit models" of the domain formation suggest that a thin (4-40 nm) layer of InAs on the sidewall of a ∼1 μm wide InAs/AlSb mesa could suppress domain formation without compromising the gain at terahertz frequencies.
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U2 - 10.1109/MBE.2002.1037840
DO - 10.1109/MBE.2002.1037840
M3 - Conference contribution
AN - SCOPUS:84968610496
T3 - MBE 2002 - 2002 12th International Conference on Molecular Beam Epitaxy
SP - 223
EP - 224
BT - MBE 2002 - 2002 12th International Conference on Molecular Beam Epitaxy
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th International Conference on Molecular Beam Epitaxy, MBE 2002
Y2 - 15 September 2002 through 20 September 2002
ER -