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SUMMARY:Nanopillar Lasers on Silicon and High Contrast Subwavelength Devic
 es
DTSTART:20100921T133000
DTSTAMP:20260928T223455Z
UID:112c555113839080b37d94e0530b9871cd69ce39bc7ec57ba5d2a739
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Connie Chang-Hasnain \nNanoscale semiconductors are prom
 ising platform for monolithic integration of materials with dissimilar lat
 tice constants.  In this talk\, I will discuss the synthesis and character
 istics of GaAs nanoneedles monolithically grown on Si with CMOS compatible
  temperature and process.  I will review results on avalanche photodetecto
 rs with high gain and light emitting diodes.  I will also discuss recent b
 reakthrough of nanopillar lasers on silicon. This new material platform is
  excellent for active Si photonics.  \n\nA second part of my talk will be 
 on high-contrast subwavelength optics as they open up a new window to mani
 pulate wave guiding properties.  I will discuss some extraordinary propert
 ies 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 inst
 ead of conventional distributed Bragg reflectors.  The HCG-VCSELs will bri
 ng cost-effective solution to CWDM local area networks and WDM PON.  The H
 CG also will bring guided-wave optics to a untrespassed regime and find ma
 ny useful applications in lasers\, filters\, waveguides\, lenses\, saturab
 le absorber switches\, and sensors.
LOCATION:MXF-1
STATUS:CONFIRMED
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