Raman

1 Overview
2 General information
3 Booking System
4 Technical details
5 Pdf manuals and software
6 User List

Overview

The LabRAM HR UV-NIR instrument is a single stage dispersive Raman microscope system with an 800 mm high-resolution spectrograph. The Raman/laser filtering is based on edge filters in an injection/rejection configuration. The system is adapted to a PARK XE-100 AFM system.

General information

Location of the Raman in Nanotalo (black square)

Device: Horiba Jobin-Yvon Labram HR Raman spectrometer, coupled to a Park Systems XE-100 AFM
Contact person: Alexander Savin
Location: AFM Room (room 170b in Nanotalo)
Status: Working

Booking System

Booking is done in the Aalto infrabooking system.

In order to obtain booking rights for the Raman, contact Alexander Savin to organize a training session.

Technical details

Lasers and optics

powers given below are approximate powers hitting the sample when using the 100x objective, no attenuation filters, and standard settings of the laser
Helium-neon laser:
- 633 nm, 6 mW
Argon laser:
- 488 nm, 11 mW
- 514 nm, 14 mW
- possible upgrade: 457 nm (new notch and edge filters required)
Infrared diode laser:
- 785 nm, 15 mW
Laser spot diameter: < 1 μm
Laser filter: edge filter allowing Stokes measurements above 100 cm^-1
Attenuation filter absorbances: --- (D0, no filter), D0.3, D0.6, D1, D2, D3, D4 (motorized)
- $P_\mathrm{filtered}=P_0\cdot10^{-D}$
Optics spectral range: 220...1600 nm

Optical microscope

Model: Olympus BX41
Stage: motorized XYZ stage with PC and joystick control
- scan area 75 × 50 mm (X × Y)
- step size 0.1 μm
- allows automated acquisition of Raman maps
Light source: top and bottom
Objectives:
- 10x, NA = 0.25, WD = 10.6 mm
- 20x, NA = 0.35, long-WD (SLMPL)
- 50x, NA = 0.75, WD = 0.37 mm
- 100x, NA = 0.9, WD = 0.21 mm
Optical camera: μEye UI-1540SE-C-BG

Spectrograph

Focal length: 800 mm
Gratings:
- Visible light: 600 gr/mm and 1800 gr/mm (76x76 mm, motorized)
- Infrared: 1200 gr/mm (76x76 mm, has to be changed manually)
Spectral resolution: 0.35 cm^-1/pixel (at 633 nm with 1800 gr/mm grating)
Motorized entrance slit used as a confocal pinhole (continuously adjustable)
Axial confocal performance: < 2 μm (dependent on pinhole size)

Detector

Type: CCD
Resolution: 1024x256 (pixel size 26x26 μm)
Operating temperature: -70 °C
Spectral range: 200...1050 nm
Quantum efficiency: > 30 % (500...800 nm)
Typical read-out noise: 4 e^- (rms)
Dark noise: < 0.002 e^-/(pixel⋅s)

Raman

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