Zero-threshold optical gain in electrochemically doped nanoplatelets and the physics behind it

HIGHLIGHTS

• What: Combining electrochemical doping with transient absorption spectroscopy the authors demonstrate that the gain threshold is fully removed over a broad spectral range and gain coefficients of several thousand cm-1 are obtained. The authors demonstrate that limit is in effect ideal for optical gain and that it results in an optimal lateral size of the platelets where the gain threshold per nm2 is minimal. The authors investigate the development of gain in optically excited and electrochemically n-doped CdSe/CdS/ZnS core- shell-shell (CSS) NPLs. The authors demonstrate that the authors can fully bleach the . . .
  

   

  

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