## Description of the "Inverse Polarization Spectrum" script

### Short explanation of operation:

Measures polarization dependent spectra, but in contrast to the Wizard it changes the polarization direction for every Wavelength step. Nevertheless the result is rather the same, a spectrum for vertical and horizontal emission polarization (and optional for magic angle)

### Hardware prerequisites:

FluoTime with

- laser source
- Emission Monochromator
- Emission Polarizer
- DETECTOR_1 (used for measurement)

Note: It is possible to use use DETECTOR_2 for the measurement. Replace all occurrences of DETECTOR_1 in the script by DETECTOR_2

### Software prerequisites:

EasyTau Version > 2.2

### Prior running the script

Please adapt the script to your needs

#### Please set manually:

- Emission monochromator exit port to deliver light to DETECTOR_1
- Emission monochromator slit width / bandwidth to define the detection bandpass
- Electrical switches (if exist) to deliver electrical signal from DETECTOR_1 to TCSPC electronics
- light source settings: repetition frequency, intensity
- Excitation monochromator wavelength, and bandpass
- TCSPC electronics for measurement

#### Values to adjust in the script:

- Sample: Sample name for workspace
- Solvent: Solvent name for workspace
- Container: Name for the File to be saved (gets extension _TRES for the decays and _Spectrum for the spectra file)
- SaveTRES: TRUE = Save a Datafile with all the Decays inside and a formula how to create the 2 spectra from them in Plot (can be used for fitting)
- SaveSpectrum: TRUE = Save a Datafile with the 2 spectra inside if you provide a Correction Curve it will be also saved into the container and a formula is created to correct both spectra
- CorrectionCurve: Name of the correction curve depends on the settings of your FT300: Name consists of 'Ref_' + Detector Name + '_' + Emission monochromator grating number (1,2,3) + '_' + emission polarizer position (V,M,H,U) therefore the default: "Ref_DETECTOR_1_1_M" means: DETECTOR_1, First Grating, Emission Polarizer Magic Angle or "Ref_DETECTOR_2_2_U" means: DETECTOR_2, Second Grating, Emission Polarizer not available (unknown polarization) check your installation folder: EasyTau\ET_SysData\RefCurves for available curves.
- StartWL: Start of emission spectrum in nanometer
- StopWL: End of emission spectrum in nanometer
- DeltaWL: Step size for emission spectrum in nanometer
- TimePerPoint: Integration time for every wavelength step and every polarization direction in seconds
- WithMagic: Include the magic angle to the measurement