Nanopillar Lasers on Silicon and High Contrast Subwavelength Devices
Event details
| Date | 21.09.2010 |
| Hour | 13:30 |
| Speaker | Prof. Connie Chang-Hasnain |
| Location |
MXF-1
|
| Category | Conferences - Seminars |
Nanoscale semiconductors are promising platform for monolithic integration of materials with dissimilar lattice constants. In this talk, I will discuss the synthesis and characteristics of GaAs nanoneedles monolithically grown on Si with CMOS compatible temperature and process. I will review results on avalanche photodetectors with high gain and light emitting diodes. I will also discuss recent breakthrough of nanopillar lasers on silicon. This new material platform is excellent for active Si photonics.
A second part of my talk will be on high-contrast subwavelength optics as they open up a new window to manipulate wave guiding properties. I will discuss some extraordinary properties of high contrast gratings (HCG) including ultra broad band reflectors, resonators and a new integrated optics using HCG as a platform. I will discuss tunable and multi-wavelength VCSEL array fabricated using HCG instead of conventional distributed Bragg reflectors. The HCG-VCSELs will bring cost-effective solution to CWDM local area networks and WDM PON. The HCG also will bring guided-wave optics to a untrespassed regime and find many useful applications in lasers, filters, waveguides, lenses, saturable absorber switches, and sensors.
Practical information
- General public
- Free
Contact
- Yvonne Cotting