Set directions for SHG tensor in Lumen

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Set directions for SHG tensor in Lumen

Postby tg825590 » Tue Oct 03, 2017 3:37 am

HI,
I try to do SHG calculation in lumen, but I cannot find a forum for lumen so I ask questions here. I wonder how to set the direction for the SHG tensor chi. As far as I am concerned, Chi_ijk could be expressed as P_i=Chi_ijk E_j E_k, so how can we determine the i,j and k in lumen? I read the tutorial for lumen SHG in AlAs,
http://www.attaccalite.com/lumen/shg_in_AlAs.html and the external field is set as
ExtF_Dir
1.000000 | 1.000000 | 0.000000 |

Does it mean setting j=x and k=y? And the output for x,y,z directions should give Chi_xxy, Chi_yxy, Chi_zxy? If so, why does the tutorial plot give a label as Chi_xyz?
tg825590
 
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Re: Set directions for SHG tensor in Lumen

Postby Daniele Varsano » Tue Oct 03, 2017 6:24 am

Dear tg825590,

I'm sorry but this is not the right place to post questions about lumen. I suggest you to contact Claudio Attaccalite, the developer, or write a post in his blog: for instance here:
https://www.attaccalite.com/lumen-code-is-online/

Finally, pleas sign your posts with your name and affiliation, this is a rule of the forum, as it is not nice to communicate with anonymous users.
Best,

Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/
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Daniele Varsano
 
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Re: Set directions for SHG tensor in Lumen

Postby tg825590 » Tue Oct 03, 2017 4:59 pm

Thanks for your help! By the way how can I sign my post with name and affiliation?

wenshen
Wenshen
Washington University
tg825590
 
Posts: 2
Joined: Wed Sep 27, 2017 6:34 pm

Re: Set directions for SHG tensor in Lumen

Postby Daniele Varsano » Tue Oct 03, 2017 11:51 pm

Dear Weshen,

By the way how can I sign my post with name and affiliation?

The way to do it once for all:
User control panel -> profile -> Edit signature.

Best,

Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/
User avatar
Daniele Varsano
 
Posts: 1950
Joined: Tue Mar 17, 2009 2:23 pm


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