Monday - Optical Properties of III-V Nanowire Arrays - McCullough 218 @ 2:30PM-3:00PM

Vijay Kris Narasimhan vijayn at stanford.edu
Mon Aug 20 07:24:01 PDT 2012


Hey All, 


Just a quick reminder about Nicklas's talk this afternoon. Let me know if you'd like to come! 


Vijay 

----- Original Message -----

From: "Vijay Kris Narasimhan" <vijayn at stanford.edu> 
To: "labmembers" <labmembers at snf.stanford.edu>, "cuigroupmaillist" <cuigroupmaillist at lists.stanford.edu>, "Melosh Group" <melosh-group at lists.stanford.edu>, "Paul McIntyre" <pcm1 at stanford.edu>, "James Harris" <jhharris at stanford.edu> 
Cc: "Nicklas Anttu" <nicklas.anttu at ftf.lth.se> 
Sent: Friday, August 17, 2012 7:18:57 AM 
Subject: Monday - Optical Properties of III-V Nanowire Arrays - McCullough 218 @ 2:30PM-3:00PM 


Hi All, 


Nicklas Anttu from Professor Hongqi Xu's group at Lund University will be visiting Stanford on Monday. He will discuss the optical properties of nanowire arrays and present work on characterizing these arrays optically during a half-hour talk at 2:30PM in McCullough 218 followed by a short informal Q&A period. Please see the abstract below and circulate to your colleagues and students if you think they'd be interested. 


Please RSVP to me if you'd be interested in attending. Hope to see you there! 


Cheers, 


Vijay Kris Narasimhan, International Fulbright S&T Fellow 
Cui & Melosh Research Groups 
Department of Materials Science and Engineering Optical Properties of III-V semiconductor nanowire arrays 
Monday, August 20, 2012, 2:30PM~3:00PM, McCullough 218 

Abstract 
Vertical III-V semiconductor nanowire arrays offer the possibility for highly tunable optical response in opto-electronic applications. In this presentation, I review the strongly diameter dependent absorption of light in InAs nanowire arrays. 1 Recent results of a four-fold absorption enhancement by a non-absorbing dielectric shell around the nanowires and the underlying physical mechanism will also be discussed. After that, a method for extracting the nanowire dimensions from measured reflectance spectra is demonstrated for as-grown InP nanowire arrays. Finally, a brief overview of the modeling of nanowire arrays for photovoltaics is given with emphasis on different optical loss mechanisms. 

[1] Wu, P. M.; Anttu, N.; Xu, H. Q.; Samuelson, L.; Pistol, M.-E. Nano Letters 2012 , 12 , 1990. 

Biography 
Nicklas Anttu is a final year PhD student under the supervision of Professor Hongqi Xu at the Division of Solid State Physics at Lund University, Sweden. His research in nanophotonics is focused on the modeling of the optical response of nanostructures with special emphasis on semiconductor nanowires as well as plasmonic systems. 
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