Experimental evidence for a spontaneously generated effective mass lateral superlattice

Mascarenhas, A.; Alonso, R.G.; Horner, G.S.; Froyen, Sverre; Hsieh, K. C.; Cheng, K. Y.

doi:10.1016/0749-6036(92)90220-y

Cited by 18 publications

(16 citation statements)

References 12 publications

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“…We also observed a spectral blue-shift while changing the polarization direction. These effects are similar to those for LCM-mode-grown InP-GaP lateral superlattice structures [9][10][11].…”

Section: Introductionsupporting

confidence: 72%

“…1(b) shows normal quantum dots (bright spots) aligned along the [1][2][3][4][5][6][7][8][9][10] direction. Closely-located quantum dots along the [1][2][3][4][5][6][7][8][9][10] direction are linked and form a string-like structure. However, the figure shows that some QDs remain as isolated normal QDs.…”

Section: Methodsmentioning

confidence: 99%

“…Two pronounced photoluminescence (PL) emission peaks emerge, which are identified as transitions of normal QDs and SQDs. We found that under the strain field, such aligned SQDs and normal QDs exhibit strong optical polarization anisotropy while rotating the PL probe polarizer from the [1][2][3][4][5][6][7][8][9][10] to the [110] crystal direction. We also observed a spectral blue-shift while changing the polarization direction.…”

Section: Introductionmentioning

confidence: 99%

“…Lateral composition modulation (LCM) in compound semiconductors is an example of the consequence of a strain-induced heterostructure [1][2][3] wherein different atoms cross-penetrate and develop a periodic modulation of the quantum structure along the lateral [110] crystal direction; hence, the [1][2][3][4][5][6][7][8][9][10] crystal direction becomes the plane of the well and the barrier. Such lateral semiconductor heterostructures exhibit pronounced optical properties such as optical polarization anisotropy or spectral energy shifts along the [110] and the [1][2][3][4][5][6][7][8][9][10] directions due to the biaxial strain fields [4][5][6]. Another example is the growth of Stranski-Krastanov (SK)-mode self-assembled quantum dots (QDs).…”

Section: Introductionmentioning

confidence: 99%

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Optical anisotropy in InP string-like aligned quantum dots

Kim

Song

Han

2014

Journal of the Korean Physical Society

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InP quantum dots were grown by using the molecular beam epitaxy technique. The quantum dots were connected and composed a string-like one-dimensional structure in the [1-10] crystal direction due to the strain field along the [110] direction. Two prominent photoluminescence transitions from normal quantum dots and string-like one-dimensional structures were observed and showed strong optical emission anisotropy. Both peaks also showed blue-shifts while rotating the emission polarization from the [1-10] to the [110] direction. Such optical transition behaviors are the consequence of valence band mixing caused by the strain field along the [110] crystal direction.

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Section: Introductionsupporting

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical anisotropy in InP string-like aligned quantum dots

Kim

Song

Han

2014

Journal of the Korean Physical Society

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“…Recent studies have demonstrated LCM in a number of III-V semiconductor ternary alloys, both in ABC 2 single-layer structures 1,2 and in vertical short-period superlattice ͑SPS͒ structures consisting of two lattice mismatched components (AB) m /(CD) n , i.e., (InP) m /(GaP) n , 3,4 where m and n denote the number of atomic monolayers. Typical lateral wavelengths range from 100 to 400 Å.…”

Section: Introductionmentioning

confidence: 99%

Lateral composition modulation in InAs/GaSb superlattices

Stokes

Forrest

et al. 2003

Journal of Applied Physics

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We report the analysis of lateral composition modulation in (InAs) m /(GaSb) m superlattices by x-ray diffraction. Vertical and lateral satellite peaks for a 140 period structure were observed. The lateral modulation wavelength, average superlattice composition, and vertical superlattice wavelength were determined. The lateral modulation was observed only along one in-plane direction resulting in quantum wire-like structures along the ͓110͔ direction. The unconventional structure of the lateral composition modulation, in which the stacking of the layers leads to a doubling of the vertical superlattice period, is discussed.

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