TDTR Process Flow Chart

TDTR Data Process

• Basically this just sets up the ability to analyze different things
• Each section starts with setting variables, then asks for the config file, then ask for data files
• Then they use a fitting file to fit the data for whatever method it is
• Then it saves all the files
• That's about it in terms of set up

5. Parameter Scan

3. Two Freq Fitting

1. Fitting

2. Theory Curve

7. Mapping

4. Sensitivity

6. Phonon-Electron Coupling Factor

This mode fits the data to the model

i. TDTRdataTwoFreFitting

i. Theory Data

i. getlabel_S

i. getLabel

ii. Theory Data

Fits the data to multiple frequencies

i. getLabel

• Calculates data from the theoretical model
• Laser frequency (80Mhz specified)
• Use k to be 3.27 for accumulation
• Kmax_n = 5000 -> considered the maximum accumulation number
• HeatTransferModel_1
• Real imaginary part
• Z = output of the lockin
• swit_fun

i.getLabel_EP

ii. Theory Data

a. dealRawData

a.1. switFunc

Crazy it gets a label for different parameters

• Calculates data from the theoretical model
• Laser frequency (80Mhz specified)
• Use k to be 3.27 for accumulation
• Kmax_n = 5000 -> considered the maximum accumulation number
• HeatTransferModel_1
• Real imaginary part
• Z = output of the lockin
• swit_fun

a. Heat Transfer Model

ii. dealTDTRrawData

ii. TDTRDataFitting

ii.TDTR_EP_FittingData

• Feser Videos
• Main Calulations for the heat transfer model
• Fourier Transform to Hankel Transform

• Calculates data from the theoretical model
• Laser frequency (80Mhz specified)
• Use k to be 3.27 for accumulation
• Kmax_n = 5000 -> considered the maximum accumulation number
• HeatTransferModel_1
• Real imaginary part
• Z = output of the lockin
• swit_fun

a. Heat Transfer Model

• Feser Videos
• Main Calulations for the heat transfer model
• Fourier Transform to Hankel Transform

b. switFunc

• dealRawData
• Changes the data from 4 inputs to 2
• Value_0 = config.fit_para( :, 3)’
• All rows 3rd column and transposed
• Switch cases for different indexes of column 2
• Evaluate if they are equal
• Lower bound lb = all rows 4th column / value_0
• Upper bound ub = all rows 5th column/ value_0
• Costfunction_assist
• @ beta defines a variable for the function
• Then gaoptimset - with no input or output arguments displays a complete list of options with their valid values
• Beta = ga finds minimum
• Loss = func(beta)
• Exports results

• Convert time to picoseconds
• Converting values to correct units
• Costfunction_EP_assit.m
• Costfunction_EP
• Sum of squares between theory and data
• Display results

b. Costfunction_assist

Prep data for cost function

b.1. Costfunction

Sum of squares of differences between theory and data

Statistical measure of std

b.i. Theory Data

b.a. HeatTransfer 1

b.b. switFunc

a. Heat Transfer Model

iii. dealFileList

• Switches function
• Based off case (r, p, a, x, amp)
• Ratio = absolute val (-x/y)
• P = arctan(y/x) *180pi - converts to radians
• X = X Temp/ max temp
• Amp = amplitude / maximum amplitude

b. switFunc

• Feser Videos
• Main Calulations for the heat transfer model
• Fourier Transform to Hankel Transform

• Switches function
• Based off case (r, p, a, x, amp)
• Ratio = absolute val (-x/y)
• P = arctan(y/x) *180pi - converts to radians
• X = X Temp/ max temp
• Amp = amplitude / maximum amplitude

ii. getlabel_S

a. DealRawData

b. switFunc

a. dealRawData

iii. getColors

• Switches function
• Based off case (r, p, a, x, amp)
• Ratio = absolute val (-x/y)
• P = arctan(y/x) *180pi - converts to radians
• X = X Temp/ max temp
• Amp = amplitude / maximum amplitude

• Separates and converts raw data into tau_raw in (ns) , X_raw, Y_raw
• Finds the zero point mode of time
• This is when dx or X is maximum is zero
• Shift the phase for Y to have minimum skip at zero
• Then use SetPhaseRatio
• Apply the phase shift to the raw data
• Set data to be in the range of minimum to maximum

b. CostFunction_EP_assist

i. Theory Data

c. CostfunctionTwoFreq_assist

Calculate the cost function for a variable beta

Use costFunction_ assist an a loop to sum the cost function

c.1. Costfunction_assist

c.i. Costfunction

c.a. TheoryData

c.1.1. HeatTransfer1

c.1.2.switFunc

a.1. switFunc

a.1. CostFunction_EP

• Calculates data from the theoretical model
• Laser frequency (80Mhz specified)
• Use k to be 3.27 for accumulation
• Kmax_n = 5000 -> considered the maximum accumulation number
• HeatTransferModel_1
• Real imaginary part
• Z = output of the lockin
• swit_fun

• Switches function
• Based off case (r, p, a, x, amp)
• Ratio = absolute val (-x/y)
• P = arctan(y/x) *180pi - converts to radians
• X = X Temp/ max temp
• Amp = amplitude / maximum amplitude

c.TheoryFun_assist

a. Heat Transfer Model

• Feser Videos
• Main Calulations for the heat transfer model
• Fourier Transform to Hankel Transform

a.1. TheoryData_EP

b. switFunc

d. TheoryFun_assist

Preps Data for theoryData

d.1. TheoryData

d.i. HeatTransferModel

d.ii. switFunc

• Switches function
• Based off case (r, p, a, x, amp)
• Ratio = absolute val (-x/y)
• P = arctan(y/x) *180pi - converts to radians
• X = X Temp/ max temp
• Amp = amplitude / maximum amplitude