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Volumn 94, Issue 15, 2005, Pages

Control of vertically coupled InGaAs/GaAs quantum dots with electric fields

Author keywords

[No Author keywords available]

Indexed keywords

CONTROLLABLE INTERACTIONS; ELECTRICAL GATES; QUANTUM COMPUTING; QUANTUM INFORMATION TECHNOLOGY;

EID: 18144407302     PISSN: 00319007     EISSN: 10797114     Source Type: Journal    
DOI: 10.1103/PhysRevLett.94.157401     Document Type: Article
Times cited : (141)

References (29)
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    • and references therein
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    • Model results for electrical gates on CQDs have been discussed in G. Burkard et al., Phys. Rev. B 62, 2581 (2000); electric field control of CQDs has been studied in I. Shtrichman et al., Phys. Rev. B 65, 081303 (2002), but evidence for coherent coupling was not obtained there.
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    • Burkard, G.1
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    • Model results for electrical gates on CQDs have been discussed in G. Burkard et al., Phys. Rev. B 62, 2581 (2000); electric field control of CQDs has been studied in I. Shtrichman et al., Phys. Rev. B 65, 081303 (2002), but evidence for coherent coupling was not obtained there.
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    • note
    • The detailed structures of vertical CQDs are not yet known well. Other PL data interpretations are possible such as dot coupled to the wetting layer of other dot.
  • 13
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    • note
    • Interactions between QDs in systems based on gated quantum wells also have been seen, but their coupling typically is small ∼1 meV.
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    • The dephasing of excitons in single QDs has been studied in P. Borri et al., Phys. Rev. Lett. 87, 157401 (2001); and compared to that in CQDs in 91, 267401 (2003).
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    • The dephasing of excitons in single QDs has been studied in P. Borri et al., Phys. Rev. Lett. 87, 157401 (2001); and compared to that in CQDs in 91, 267401 (2003).
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    • note
    • 4 was studied. Splittings up to several 10's of meV were observed, in agreement with calculations such as Fig. 2.
  • 19
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    • note
    • The basis functions |...〉 in Eq. (1) are products of ortho-normalized single electron and hole states for isolated dots that include the effect of the other's potential [14].
  • 20
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    • note
    • eh is the e-h Coulomb interaction [14].
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    • The parameters were obtained from C. Pryor, Phys. Rev. B 60, 2869 (1999), using interpolations for 60% In concentration. Potential offset in growth direction for electrons and holes were 0.35 and 0.07 eV respectively; the lateral potentials were taken to be parabolic with quantization energies of 20 meV for electrons and holes; the masses in lateral direction for both electrons and holes were 0.038 and those in growth direction were 0.06 and 0.4 for electrons and holes, respectively.
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    • note
    • Examples of CQDs have also been studied in which the energies of the two individual QDs are different at E = 0 and are brought into resonance with a field.
  • 24
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    • See, e.g., F. Findeis et al., Phys. Rev. B 63, 121309 (2001).
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.