[14a-2Q-1~13] 9.2 Nanowires and Nanoparticles

△ [14a-2Q-5] Quantum resonance in periodically-ordered superlattice of CdTe quantum dots

〇Taichi Watanabe¹, Shougo Tomita¹, Kazuma Ohshiro¹, Chang I-Ya^2,3, Hyeon-Deuk Kim^2,3, DaeGwi Kim¹ (1.Osaka City Univ., 2.Kyoto Univ., 3.JST Sakigake)

Keywords:quantum dots,Layer-by-layer method,quantum resonance

We study the pure quantum resonance in the CdTe quantum dot (QD) superlattice deposited by a layer-by-layer assembly of positively charged polyelectrolytes and negatively charged CdTe QDs. From XRD measurements, existence of the periodical ordering of QDs both in the lamination and in-plane directions, that is, the formation of the 3D periodic QD superlattice was confirmed. The lowest excitation energy decreases exponentially with decreasing the nano space between the CdTe QD layers and also with decreasing the QD size, which is apparently indicative of the quantum resonance between the QDs rather than a dipole-dipole Coulomb coupling.