Excitons in   superlattices grown by photomodulated MOCVD

Permogorov, S.; Tenishev, L.; Reznitsky, A.; Кузнецов, П. И.; Chernushich, A. P.; Zakharov, L. Yu.; Yakushcheva, G. G.

doi:10.1016/0022-0248(95)00782-2

Cited by 2 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For twodimensional excitons the density of states should have a step-like character. As a result, in the equilibrium case the maximum of the exciton energy distribution should not shift to higher energies with the increase in temperature [4]. Therefore in 2D case the shift of J2LO band in respect of the low energy threshold should not change with temperature (ΔΜ2LO = 0).…”

Section: Discussion Of Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe_1-xS_x/ZnSe_1-yS_ySuperlattices

et al. 1996

Self Cite

View full text Add to dashboard Cite

We studied the luminescence of bulk Zn1-x Cd x Se solid solutions, epitaxial ZnSe films and ΖnSe1-xSx/ΖnSe1-ySy superlattices at Τ = 2-80 K.The analysis of the bands of exciton radiative annihilation with simultaneous emission of 1 or 2 LO phonons shows that the excitons in the studied samples can be considered as free particles with thermalized distribution of kinetic energies. In ZnSe 1 -x S x /ZnSe1-y S y superlattices a three-dimensional character of exciton motion was established. The periodic potential of su -p e r l a t t i c e p e r t u r b s t h e e x c i t o n w a v e v e c t o r a n d i n d u c e s a d d i t i o n a l e l a s t i c scattering of excitons.PACS numbers: 78.20.Ci SamplesBulk samples of cubic Zn 1 -x Cdx Se were grown from vapour phase and had cadmium content x = 0.05-0.07 as determined from the position of exciton reflection hines. High quality epitaxial ZnSe films with thickness up to 10 μm were grown by photoassisted metal-organic chemical vapour deposition (MOCVD) on (100) GaAs substrates using (Et)2Zn, (Met)2Se and (Et)2S as sources.ΖnSe1-x S/ΖnSe1-y Sy superlattices were grown on GaAs at T = 4500C by photomodulated MOCVD [1]. It was found that the photostimulation with blue light during the growth of ZnSeS influences the solution composition and hence the band gap of the growing material. By periodic modulation of the photostimulation intensity the superlattices (SL's) consisting of alternating ZnSeS 1ayers of different composition were grown. Formation of superlattices by this method was confirmed by X-ray analysis. The typical parameters of superlattices were: SL period -120 nm; number of periods -50-300; total thickness -2-7 μm, average sulphur content -2-8%, band-gap modulation -10-20 meV.(959)

show abstract

Section: Discussion Of Resultsmentioning

confidence: 98%

“…The appearance of elastic scattering breaks the correspondence between the wave vectors of exciton and emitted phonon. As a result, due to the averaging of scattering probability over the phonon wave vectors, the allowed scattering appears in J1LO band and its shape can be represented as [4]:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe_1-xS_x/ZnSe_1-yS_ySuperlattices

et al. 1996

Self Cite

View full text Add to dashboard Cite

show abstract

CdSe, ZnSe, (Cd,Zn)Se, and (Zn,Mg)(S,Se) superlattices and coupled quantum wells

Kalt¹

Landolt-Börnstein - Group III Condensed Matter

View full text Add to dashboard Cite

Excitons in superlattices grown by photomodulated MOCVD

Cited by 2 publications

References 6 publications

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe_1-xS_x/ZnSe_1-yS_ySuperlattices

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe_1-xS_x/ZnSe_1-yS_ySuperlattices

CdSe, ZnSe, (Cd,Zn)Se, and (Zn,Mg)(S,Se) superlattices and coupled quantum wells

Contact Info

Product

Resources

About

Excitons in superlattices grown by photomodulated MOCVD

Cited by 2 publications

References 6 publications

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe1-xSx/ZnSe1-ySySuperlattices

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe1-xSx/ZnSe1-ySySuperlattices

CdSe, ZnSe, (Cd,Zn)Se, and (Zn,Mg)(S,Se) superlattices and coupled quantum wells

Contact Info

Product

Resources

About

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe_1-xS_x/ZnSe_1-yS_ySuperlattices

Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe_1-xS_x/ZnSe_1-yS_ySuperlattices