Full text loading...
(Color online) Photo-pumping demonstration of CQDs coated on the patterned CHDV substrate (1.5 × 1.5 cm2): (a) under and (b) above the lasing threshold. Inset of (a): pump spot profile. (c) Angular-dependent measurement of DFB CQD laser emission. The corresponding ’0’ degree (not shown here) represents the normal of the sample surface plane.
(Color online) Typical DFB CQD laser normalized spectra: (a) 0.13-nm resolution spectrum showing multimode operation and (b) tunable lasing peaks using different sizes of CdSe/ZnS CQDs (2.4-nm resolution).
(Color online) DFB CQD laser emission behavior: (a) spectral evolution as the pump fluence increases and (b) its threshold behavior.
(Color online) Lifetime test for the DFB CQD laser (pump fluence: 6 mJ/cm2): (a) spectral evolution, and (b) peak intensity, as a function of the number of pump pulses.
Article metrics loading...