Strong resonant luminescence from Ge quantum dots in photonic crystal microcavity at room temperature

作者：Xia J S^*; Ikegami Y; Shiraki Y; Usami N; Nakata Y

来源：Applied Physics Letters, 2006, 89(20): 201102.

DOI：10.1063/1.2386915

Freestanding hexagonal two-dimensional photonic crystal (PhC) microcavities with Ge self-assembled quantum dots were fabricated on silicon-on-insulator substrates. Strong photoluminescence associated with Ge quantum dots was observed in the wavelength region of 1.2-1.6 mu m at room temperature. Sharp peaks dominated the spectrum, showing strong optical resonance inside the cavity. A resonant peak with a quality factor of 560 was observed at 1.58 mu m along with a significant enhancement of the luminescence in the microphotoluminescence spectrum. The peaks were also observed to reasonably shift when the structural parameter of PhC was changed.

• 出版日期2006-11-13