History of HaihaoLiu-NakataniRIES16(Open) (No. 4)

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  • 3 (2016-06-08 (Wed) 17:48:21)
  • 4 (2016-06-09 (Thu) 18:10:25)
  • 5 (2016-06-20 (Mon) 19:52:36)
  • 6 (2016-06-21 (Tue) 19:05:01)
  • 7 (2016-06-22 (Wed) 18:47:26)
  • 8 (2016-07-11 (Mon) 12:11:52)
  • 9 (2016-07-11 (Mon) 16:53:28)
  • 10 (2016-07-25 (Mon) 12:15:14)
  • 11 (2016-07-25 (Mon) 19:12:05)
  • 12 (2016-07-26 (Tue) 18:37:13)
  • 13 (2016-07-27 (Wed) 18:47:50)
  • 14 (2016-07-28 (Thu) 18:34:50)
  • 15 (2016-08-05 (Fri) 00:51:32)

Here is a daily log for Haihao Liu from 2016.6.5 to 2016.8.7 in Saito Lab in Tohoku Univ.

Daily schedule (tentative)†

• 09:30-10:00 Finishing/continuing any work from previous day
• 10:00-12:00 Discussion with Shoufie-san
• 12:00-13:00 Lunch
• 13:00-14:30 Discussion with Shoufie-san
• 14:30-15:00 Prepare daily report presentation
• 15:00-15:30 Meeting with Saito-sensei
• 15:30-17:30 Continuing work/updating Pukiwiki

Goal of the project†

• To enhance electric field at graphene surface by changing the possible patterns of dielectric thin layers through deep learning algorithms.
• Keywords: graphene, transfer matrix, deep learning.

Questions and Answers†

This section is for posting questions from Haihao-san and answers from other group members.

• Please list here with some simple reasons or details.
• For every problem, give a tag double asterisks (**) in the code so that it will appear in the table of contents.
• For the answer, give a tag triple asterisks (***) in the code below the problem in order to make a proper alignment.
• List from new to old.

Q: (Placeholder)†

A: (Placeholder)†

Report†

This part is basically written by Haihao-san. Any other people can add this. Here the information should be from new to old so that we do not need to scroll.

June 9†

• Wrote MATLAB program to plot intensity of E field in Fibonacci lattice as function of position (z), looked at positions of enhancement

To do:

• Adapt code to calculate transfer matrix and plot transmission and enhancement for any arbitrary sequence
• Design error function (0-100 scale) to measure how close a given transmission or enhancement spectrum is to a target spectrum
• Look into Caffe machine learning

June 8†

• Wrote MATLAB program to construct transfer matrix for n-th Fibonacci lattice
• Plotted transmission probability as a function of frequency, 10th gen made a nice looking fractal

To do:

• Clean up MATLAB code
• Plot E field in Fibonacci lattice as function of distance (z), see points of most enhancement

June 7†

• Walked to campus, took around 30 mins
• Found explicit formula for n-th Fibonacci number, and wrote Python program to generate n-th iteration of the Fibonacci fractal
• Had lunch with Hasdeo-san, bought lunch by weight from cafeteria (entrees 1.4 yen/g, rice .43 yen/g)
• Derived matching (boundary) and propagation matrices in transfer matrix method, used to calculate R and T probabilities for comparison
• Derived E and H relations from Maxwell's equations (Ampere's)
• Introduced myself at group meeting, shared some omiyage from China
• Set up printer over LAN, had to install driver manually

To do:

• Check that theory agrees with Snell's Law
• Construct transfer matrix for n-th Fibonacci lattice

June 6†

• Shoufie-san picked me up from Urban Castle Kawauchi, took me to campus by subway (International Center -> Aobayama, 200 yen ~20 mins total)
• Nugraha-sensei helped me set up lab server access, mail client, etc.
• Bento lunch from Espace Ouvert restaurant (next to 7-11 on bottom floor of new building), ate with Saito-sensei who played his ukulele
• Learned how to derive boundary conditions for EM wave passing from one dielectric media to another, using Maxwell's equations (Faraday's and Ampere's)
• Solved for reflection and transmission probabilities at boundary for normal incident wave

To do:

• Test SHH from dorm room
• Read pages on reflection and transmission of EM waves at boundary, and derive probabilities for both TE and TM both of oblique incident waves