In Wikipedia, it is said that quantum dot laser "avoid some of the negative aspects of device performance associated with traditional semiconductor lasers based on bulk or quantum well active media, Improvements in modulation bandwidth, lasing threshold, relative intensity noise, linewidth enhancement factor and temperature insensitivity have all been observed." However, according to the most recent Nature paper of Prof. Sargent's and his colloidal quantum dots book, it seemed getting cw lasing from colloidal quantum dots is a difficult task, especially for PbS/PbSe QDs and QDs in solvent. However, I do find papers that by filling solvent PbSe QD in hollow glass fiber, some authors could easily get near infrared ASE and lasing with comparablly low pumping threshold. How to understand this?
see link contain a book page 199.
and attachment too.
https://books.google.iq/books?id=RRKAAQAAQBAJ&pg=PA199&lpg=PA199&dq=colloidal+quantum+dots+good+laser+materials?&source=bl&ots=MUrO1OBqqC&sig=zr5DGpLheFtoMi7uyPfENoc0Y7U&hl=ar&sa=X&ved=0ahUKEwiCrdHV_KHTAhWII8AKHV07AksQ6AEIVzAH#v=onepage&q=colloidal%20quantum%20dots%20good%20laser%20materials%3F&f=false
Dear Osamah, Thank you for providing me this new paper! I have read the book you recommended, and the review article of V. I. Klimov (Chem. Rev.) too. For laser engineers, they do have some standards in choosing laser materials, for examle, the classic Nd3+ or Yb3+ system, maybe they are not the best, but do not have fatal disadvantages. And for scientists, things are different, they welcome this challege. Laser techniques are always pushed forward with material scientist.
Dear Hongyan Wang:
this attach file, may be you need it.
Best regard
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