| Autor: |
K. Thonke, K. Pressel, A. Dörnen, Gerhard Pensl |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Physical review. B, Condensed matter. 43(3) |
| ISSN: |
0163-1829 |
| Popis: |
We present highly resolved photoluminescence (PL) and absorption spectra of the internal d-d-shell transitions at ${\mathrm{Fe}}^{2+}$ in InP and the related phonon sidebands. By use of the Fourier-transform-infrared technique, the signal-to-noise ratio (SNR) is improved by about two orders of magnitude as compared to conventional dispersive techniques. Thus we are able to resolve new fine structure in the zero-phonon lines of ${\mathrm{Fe}}^{2+}$ in both absorption and PL. This fine structure is identified as shift induced by different iron isotopes. A better SNR also reveals several new features in PL spectra of the phonon sidebands. In absorption measurements ${\mathrm{Fe}}^{2+}$ related spectra in the energetic range of 2800 to 3400 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ (\ensuremath{\approxeq}0.35--0.4 eV) are recorded, which can be partly attributed to anti-Stokes lines of phonon coupling in emission. Additional peaks at 3103 and 3117 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ are interpreted as transitions from the $^{5}$E ground state to an excited state of the $^{5}$${\mathit{T}}_{2}$ manifold of ${\mathrm{Fe}}^{2+}$. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
