Here is a daily log for Haihao Liu from 2016.6.5 to 2016.8.7 in Saito Lab in Tohoku Univ. #contents *Daily schedule (tentative) [#schedule] - 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 [#goal] - 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 [#QA] 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) [#Q1] ***A: (Placeholder) [#A1] *Report [#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 [#june9] - 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 [#june8] - 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 [#june7] - 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 [#june6] - 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