Second, to reach a quantum-limited sensitivity using an optical phase demodulator in differential configuration.
Using a differential configuration of the CFPI has also been essential to reach a quantum-limited sensitivity by removing both intensity and phase noise of the detection laser.
The heteroshell of CaF2 was chosen as well by us to coat NaYbF4 Tm3+, leading to a 35-fold enhancement of NIR-to-NIR up-conversion intensity and reaching a quantum yield as high as 0.6% under an excitation power density of 0.3 W/cm.
Moreover, designing UCNPs with saturated PL intensity at low excitation density is also favorable to reach a high quantum yield, as this enables a much higher upconverting rate than the decay rate at the intermediate states of the lanthanide dopants.
(I seem to remember, a few years ago, another such group claiming to have reached a similar quantum breakthrough. Nothing really came from it, though).
Forbes and his ilk have reached a sort of quantum theory of food: the more they look, the more they see.
The company gathered headlines recently as it reached a deal with Quanta, a manufacturer used by Apple, to begin building AR displays.
It is likely that for samples grown using TCu = 990 °C, the density of the Cu-Te nano-rods has reached a certain value and quantum tunneling for the hole carriers among neighboring nano-rods arises, leading to the observed sharp fall of the apparent resistivity.
"I call on euro area governments in particular to work actively together to reach agreement on a quantum leap of the effectiveness of their collegial surveillance," Mr. Trichet said.
We need to make a quantum leap".
