By Sheng Liu
Today there were a couple of standouts that I’d like to highlight.
SM2J.5 Nanowire-based LEDs and Photovoltaics
Lars Samuelson reported the recent progress of LEDs and photovoltaics devices by his group and company (glō). Great advancements have been made in blue-green LEDs utilizing core-shell InGaN nanowires with external quantum efficiency of ~20%, similar as commercial products. Although more work is needed for these LEDs to achieve high power output, they are great for applications such as displaying. High performance photovoltaic devices are also demonstrated with axial GaN nanowires (InGaN quantum wells), while core-shell InGaN quantum well structures are under investigation with potentially better performances. Lars Samuelson also showed a novel fabrication process of GaAs nanowires using continuous gas-phase synthesis technique. This technique produces nanowires with tunable properties at phenomenal 1 μm/s growth rate.
SM2O Symposium on large-scale silicon photonic integration I&II
Very interesting symposium with all invited presentations. Presenters from universities and companies showed their most recent efforts in large scale silicon photonic integration which has extremely broad applications. According to Jifeng Liu from Dartmouth College (topic: Ge-on-Si integrated photonics): Integrated nanophotonics devices for high-bandwidth, ultra-low energy photonic data links offer solutions to the increase in energy consumption from computation and communication systems that has come with the rapid growth of information technology in the 21st century. Optical interconnection does not have bandwidth limit or resistive losses as its electrical counterpart, thereby providing an idea solution to high bandwidth, ultralow energy data links. Techniques are proposed to realize direct bandgap Ge so the large scale integration can be achieved with potentially <10 fJ/bit energy consumption.
I am looking forward to more exciting talks throughout the week.
CLEO: 2014 takes place 8-13 June 2014.
Posted: 10 June 2014 by
Sheng Liu
| with 0 comments