Size-dependent electronic and optical properties in zinc-blende InGaN/GaN multilayer spherical quantum dot

Ortakaya S., Kirak M., GÜLDESTE A.

JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS, cilt.26, sa.3, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 26 Sayı: 3
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1142/s0218863517500357
  • Dergi Adı: JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Multilayer quantum dot, hydrogenic impurity, optical properties, HYDROGENIC IMPURITY STATES, BINDING-ENERGY, HYDROSTATIC-PRESSURE, ABSORPTION, DONOR, WELL
  • Yozgat Bozok Üniversitesi Adresli: Evet

Özet

A theoretical investigation of the binding energy, the radial probability distribution and optical properties (absorption coefficient (AC) and refractive index change (RIC)) of InGaN/GaN multilayer quantum dot (QD) is presented. The calculations are performed within the effective-mass approximation. A shooting method is presented to obtain numerical values for the eigenvalues and eigenfunctions of the structure. The energy eigenvalue, density of probability and optical absorption are compared for cases without and with impurity. It is also found that the ACs and RICs exhibit blue or redshift with different structure of potential profile. The results indicate that the optical properties can be sensitively adjusted by geometry of structure and the presence of impurity.