S-Space College of Natural Sciences (자연과학대학) Dept. of Physics and Astronomy (물리·천문학부) Physics (물리학전공) Journal Papers (저널논문_물리학전공)
Near-field measurement of spectral anisotropy and optical absorption of isolated ZnO nanorod single-quantum-well structures
- Yatsui, Takashi; Ohtsu, Motoichi; Yoo, Jinkyoung; An, Sung Jin; Yi, Gyu-Chul
- Issue Date
- American Institute of Physics
- Appl. Phys. Lett. 87, 033101 (2005)
- We report low-temperature near-field spectroscopy of isolated ZnO/ZnMgO single-quantum-well structures (SQWs) on the end of ZnO nanorod to define their potential for nanophotonics. First, absorption spectra of isolated ZnO/ZnMgO nanorod SQWs with the Stokes shift as small as 3 meV and very sharp photoluminescent peaks indicate that the nanorod SQWs are of very high optical quality. Furthermore, we performed polarization spectroscopy of isolated ZnO SQWs, and observed valence-band anisotropy of ZnO SQWs in photoluminescence spectra directly. Since the exciton in a quantum structure is an ideal two-level system with long coherence times, our results provide criteria for designing nanophotonic devices.
- 0003-6951 (print)