Abstract

It has been demonstrated that quantum dots (QDs) can improve the properties of optical communication devices, for example, optical amplifiers having quantum dots show attractive features such as an ultrawide operating wavelength range, suppressed waveform distortion in high power output, and capability of noise reduction by limiting amplification, semiconductor lasers using quantum dots can have temperature-intensitive characteristics. In this presentation, colloid chemistry method was used to to synthesis CdSxSe1-x quantum dots with different contents. X-ray diffraction was used to characterize the crystal structure and ultraviolet-visible absorption spectrometer was used to study optical properties. The results show that the synthesized QDs is zinc blende structure, the particle size is about 3~4 nm in diameter, the band gap was tuned from 1.72 to 2.42 eV by changing the content of S.

© 2013 Optical Society of America