Extended Data Fig. 6: Higher-order mode devices.
From: Half-wave nanolasers and intracellular plasmonic lasing particles
a-b, Representative devices from different batches of varying sizes (same thickness of 290 nm) for plasmonic (a) and dielectric cavities (b). Dielectric devices with less than 880 nm sizes did not reach lasing threshold even at the highest pump power levels. c, Emission linewidths measured from six different size batches, with a total of 120 devices and 15 samples per batch. The threshold pump fluences of these devices are shown in Fig. 2. The box in the error bar represents the mean value, while the whiskers show the standard deviation. d, The ratio between the peak threshold powers for picosecond and nanosecond pumping of the devices batches, as shown in Fig. 2 and Extended Data Fig. 6c. Again, the box in the error bar represents the mean value, while the whiskers show the standard deviation. e, FDTD results of a 350-nm rhombus-shape showing a second order mode at 1206 nm (top) and a rectangular-shape 500-nm device showing a whispering gallery mode (Q = 94) at 1164 nm (bottom).
