Feb
NanoLund Photons meeting: Nanowire optoelectronics
We will have the first NanoLund photons seminar of this semester. Two PhD students from Synchrotron Radiation Research will talk about nanowire optoelectronic devices.
Vidar Flodgren will talk about “Direct on-Chip Optical Communication between Nano Optoelectronic Devices”
On-chip optical communication between individual nano optoelectronic components is an important step in realising new semiconductor architectures. One such, is a proposed neuromorphic optical broadcasting network, whose analogue weights would mimic the brain operation of an insect during navigation. We demonstrate an example of direct on-chip directional broadcasting of light between individual InP nanowire photodiodes on silicon, identifying where significant improvements to device components need to be made. We find that the nanowire circuit performance parameters will be able to satisfy the quantitative requirements to run the tasks of neural nodes in a bioderived neural network for autonomous navigation.
Nils Lamers will talk about “Deep subwavelength optical imaging with a single vertical nanowire photodetector”
Vertical nanowire devices generally consist of tens to thousands of nanowires contacted in parallel. However, devices using pixels made from single vertical nanowire offer great potential for ultra-high-resolution optoelectronic applications, with potential for optical imaging at spatial resolutions below the wavelength. In this talk, I will describe our process for reliably fabricating such devices in a scalable process that allows for the integration of multiple single nanowire pixels on a substrate. I will then discuss the usage of these devices as photodetectors in sub-wavelength scanning photocurrent imaging. We probe the limits of high-resolution detection by investigating a optical focus created by 633 nm laser with a single 70 nm-diameter pixel device.
Welcome!
Jesper and Donatas
About the event
Location:
k-space
Contact:
jesper [dot] wallentin [at] sljus [dot] lu [dot] se