As the number of cores in a processor continues to grow, so too does the challenge of connecting them all together. Traditional electrical networks fall short due to latency, limited bandwidth, and high-power consumption. Researchers have long sought for a better alternative, and on-chip nanophotonic systems have emerged as a promising substitute for traditional electrical networks.
image of a nanowire array with highly uniform morphology, respectively.
Figure 2 Schematic of fabricated nanowire array LED. L-I and I-V curves of a representative nanowire array LED. Voltage-dependent EL spectra at room temperature. Normalized voltage-dependent EL spectra from . Simulated voltage-dependent spontaneous emission spectra. Simulated emission spectrum at the bias of 1.2 V, showing the decoupled contribution from axial and radial quantum wells.
The nanowire array LEDs with pitch sizes of 0.8, 1.0, and 2.0 μm were then fabricated on the same substrate, with the corresponding electroluminescence spectra at a bias of 1.5 V as shown in Figure 3, showing a consistent trend as in the PL spectra. The EL emission from larger pitch nanowire array LED was observed at a longer wavelength, with the peak wavelength of the bias-dependent EL spectra extended from ~1.57 μm to ~1.67 um , which covers the telecommunication C band.
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