Effects of Temperature, Pressure, and Size on Different Transitions of Optical Properties of Spherical Quantum Dot
| Autor: | Hosein Mokhtari, Alireza Keshavarz, Erfan Owji |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Condensed matter physics Chemistry Band gap General Mathematics Hydrostatic pressure Physics::Optics General Physics and Astronomy 02 engineering and technology General Chemistry Dielectric Photon energy 021001 nanoscience & nanotechnology 01 natural sciences Effective mass (solid-state physics) Atomic electron transition Quantum dot 0103 physical sciences General Earth and Planetary Sciences 0210 nano-technology General Agricultural and Biological Sciences Refractive index |
| Zdroj: | Iranian Journal of Science and Technology, Transactions A: Science. 42:1669-1675 |
| ISSN: | 2364-1819 1028-6276 |
| DOI: | 10.1007/s40995-017-0153-9 |
| Popis: | In this paper, the effects of temperature, pressure, and size on the maximum of optical absorption coefficients and refractive index changes of GaAs quantum dots with a hydrogen impurity for different electronic transitions are calculated. For this propose, the effects of temperature, pressure, and size on the bandgap energy, the effective mass, and the dielectric constant are studied. Using Runge–Kutta numerical method, the eigenenergies and the eigenstates are calculated. Results show that increasing the pressure (temperature) shifts the optical properties to high photon energy and leads to decreasing (increasing) of its peak, while increasing the size shifts it to low photon energy and fluctuates its peak. Also, the s–p transition occurs in lower photon energy than the other transitions. Additionally, one can see stability behavior in fluctuations of temperature for the optical properties of s–p transition compare to the other transition. Finally, the maximum value of optical properties for different transition is fluctuated by changing the size. |
| Databáze: | OpenAIRE |
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