title: High efficiency silicon nanodisk laser based on colloidal CdSe/ZnS QDs.
abstract: BACKGROUND
  Using colloidal CdSe/ZnS quantum dots in the submicron-sized silicon disk cavity, we have developed a visible wavelength nanodisk laser that operates under extremely low threshold power at room temperature.
  
  
  METHODS
  Time-resolved photoluminescence (PL) of QDs; nanodisk by e-beam lithography.
  
  
  RESULTS
  Observation of lasing action at 594 nm wavelength for quantum dots on a nanodisk (750 nm in diameter) cavity and an ultra-low threshold of 2.8 µW.
  
  
  CONCLUSIONS
  From QD concentration dependence studies we achieved nearly sevenfold increase in spontaneous emission (SE) rate. We have achieved high efficient and high SE coupling rate in such a QD nanodisk laser.
authors: Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei, Taiwan.
authors: Yao-Chen
authors: YC
authors: Wang
authors: Chi-Tsu
authors: CT
authors: Yuan
authors: Yi-Chun
authors: YC
authors: Yang
authors: Meng-Chyi
authors: MC
authors: Wu
authors: Jau
authors: J
authors: Tang
authors: Min-Hsiung
authors: MH
authors: Shih