Excitation source: Argon-Krypton mixed ion gas laser. MODEL 2018 RM (Make Spectra Physics, USA) 

Spectrometer : MODEL T64000 (Make Jobin Yvon Horiba, France) 

Detector : Thermoelectric cooled front illuminated 1024 256 CCD. MODEL SynpseTM (Make Jobin Yvon Horiba, France) 

Collection Optics: Optical Microscope MODEL BX41 (Make Olympus, Japan)

TECHNICAL SPECIFICATIONS:

Basic Configuration Optical Diagram for the Spectrometer

1. Axial entrance slit
2. Aberration corrected holographic grating
3. Fixed mirror
4. Intermediate slit
5. Fixed mirror
6. Aberration corrected holographic grating
7. Slit to spectrograph
8. Manual intermediate slit
9. Fixed mirror
10. Aberration corrected holographic grating
11. Fixed mirror

     Round plates: Fixed mirrors

Presently Available Configuration: Single Monochromator Configuration (Double Subtractive Mode)

The double subtractive foremonochromator is used as an tunable filter in the spectral range defined by the scanning mechanism and the gratings. A polychromatic radiation enters the first monochromator through the entrance slit S1 and is dispersed by the grating G1. The exit slit of the first monochromator (entrance slit of the 2nd monochromator) Si1/2 selects a bandpass between l₁ and l₂. The grating G2 in the 2nd monochromator recombines all the dispersed radiations on the exit slit Si2/3 giving again a polychromatic radiation, but limited to only the spectral range between l₁ and l₂. The polychromatic radiation selected by the foremonochromator between l₁ and l₂  is dispersed by the grating G3 of the spectrograph. The spectrum is acquired with a multichannel detector which is mounted in the plane of the exit image or with a monochannel detector through an exit slit. See following diagram.

Focal length of the spectrometer for present configuration: 640mm

Low frequency: < 100 cm^-1

Step size: 0.00066 nm (0.03 cm^-1)

Grating: 1800 grooves/mm

Grating efficiency curve

Table for dispersion and resolution

*dimension of the chip 26 mm´26 mm ** CCD format 1024´256

Basic specification for the CCD

CCD format: 1024´256 Front illuminated open electrode CCD

Pixel size: 26 mm´26 mm

     Quantum efficiency

Basic specification for the laser

Wavelength and Maximum Power

(note: it is only  power not power density on the sample)

Collection optics

Visible confocal microscope with X-Y manual mechanical stage

and a revolver equipped with 3 achromatic objectives

10´ visible, NA= 0.25, WD=10.6 mm

50´ visible, NA= 0.75, WD=0.37 mm

100´ visible, NA= 0.90, WD=0.21 mm

Measurements will be carried out at room temperature

PURCHASE SOURCE:

Institute Funding, Year Of Installation September 2011