Structural and optical properties of lateral composition modulation in (GaP) n/(InP) n short-period superlattice

Jin Dong Song, Jong Min Kim, Young Woo Ok, Tae Yeon Seong, Yong Tak Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The structural and optical properties of lateral composition modulation (LCM) in (InP) n/(GaP) n short-period superlattice grown by molecular beam epitaxy were studied with transmission electron microscopy (TEM) and photoluminescence (PL) at the growth temperature (T g) of 425 and 490 for n = 1, 1.7, and 2. LCM occurs only in a [1 -1 0] direction at T g = 490 °C for n = 1 and 2. On the contrary, LCM occurs both in [1 -1 0] and [1 1 0] directions, parallel to [1 0 0] direction, at T g ≥ 425 °C for n = 1.7. This is due to the stronger induction of LCM in tensile strain (∼ -10% for n = 1.7) than in compressive strain (∼ 6% for n = 1 and 2). The 9 K-PL measurements show that the LCM experiences the reduction of bandgap up to ∼ 345 meV as both n and T g increase. This is the best data ever reported so far. The origin of bandgap shrinkage is mainly attributed to LCM along with the contribution of CuPt-type ordering.

Original languageEnglish
Title of host publicationConference Proceedings - International Conference on Indium Phosphide and Related Materials
Pages549-551
Number of pages3
Publication statusPublished - 2002
Externally publishedYes
Event14th Indium Phosphide and Related Materials Conference - Stockholm, Sweden
Duration: 2002 May 122002 May 16

Other

Other14th Indium Phosphide and Related Materials Conference
CountrySweden
CityStockholm
Period02/5/1202/5/16

Fingerprint

Structural properties
Optical properties
Modulation
modulation
optical properties
Chemical analysis
Photoluminescence
Energy gap
photoluminescence
Tensile strain
Growth temperature
shrinkage
Molecular beam epitaxy
induction
molecular beam epitaxy
Transmission electron microscopy
transmission electron microscopy
Direction compound
temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Song, J. D., Kim, J. M., Ok, Y. W., Seong, T. Y., & Lee, Y. T. (2002). Structural and optical properties of lateral composition modulation in (GaP) n/(InP) n short-period superlattice In Conference Proceedings - International Conference on Indium Phosphide and Related Materials (pp. 549-551)

Structural and optical properties of lateral composition modulation in (GaP) n/(InP) n short-period superlattice . / Song, Jin Dong; Kim, Jong Min; Ok, Young Woo; Seong, Tae Yeon; Lee, Yong Tak.

Conference Proceedings - International Conference on Indium Phosphide and Related Materials. 2002. p. 549-551.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Song, JD, Kim, JM, Ok, YW, Seong, TY & Lee, YT 2002, Structural and optical properties of lateral composition modulation in (GaP) n/(InP) n short-period superlattice in Conference Proceedings - International Conference on Indium Phosphide and Related Materials. pp. 549-551, 14th Indium Phosphide and Related Materials Conference, Stockholm, Sweden, 02/5/12.
Song JD, Kim JM, Ok YW, Seong TY, Lee YT. Structural and optical properties of lateral composition modulation in (GaP) n/(InP) n short-period superlattice In Conference Proceedings - International Conference on Indium Phosphide and Related Materials. 2002. p. 549-551
Song, Jin Dong ; Kim, Jong Min ; Ok, Young Woo ; Seong, Tae Yeon ; Lee, Yong Tak. / Structural and optical properties of lateral composition modulation in (GaP) n/(InP) n short-period superlattice Conference Proceedings - International Conference on Indium Phosphide and Related Materials. 2002. pp. 549-551
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