Effects of Valence-Band Mixing on the Franz-Keldysh Spectra in Quantum Well : Condensed Matter: Electronic Properties, etc.
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概要
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Using 4 × 4 Luttinger Hamiltonian, we compute the opto-absorption spectra for a 200 Å quantum well. The mixing between heavy-hole and light-hole renders non-parabolic valence subbands, therefore deforms the stair-like spectra. The electric field modulation spectra exhibit oscillatory feature, but the oscillations is different in nature from the bulk Franz-Keldysh oscillation. Stark shift of confine levels brings about the oscillations. Imposing a 10 meV broadening, it is impractical to determine the confine energies from the modulation spectra. Instead, we find that the polarization-modulation spectra contain more clear information about the confine levels.
- 社団法人日本物理学会の論文
- 2000-03-15
著者
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LU Yan-Ten
Department of Physics, National Cheng Kung University
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Lu Yan-ten
Department Of Physics National Cheng Kung University
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CHEN R.B.
Department of Physics, National Cheng Kung University
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SHYU F.L.
Department of Physics, National Cheng Kung University
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Chen R.b.
Department Of Physics National Cheng Kung University:department Of Physics Yung Ta Institute Of Tech
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Shyu F.l.
Department Of Physics Chinese Military Academy Feng-shang Kaohsiung 830
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Shyu F.l.
Department Of Physics National Cheng Kung University
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