Located in David McIntyre's lab Weniger 118.

The Scanning Monochromator can make transmission, specular reflection, and diffuse reflection measurements on thin film, single crystal, and powder samples.

There are two broadband sources for the Scanning Monochromator. The W-halogen lamp is used in the visible and NIR (note spectrum depends on filters and grating used):

and the Xe lamp in the UV-and visible.

There are two detectors for the Scanning Monochromator. The Silicon detector is 13 mm^2 and works in the UV-Vis range 350-1100 nm (down to ~1.1 eV).

The InGaAs detector is used for NIR measurements and is 3.1 mm^2 and thus it's is much more difficult, compared to the Si detector, to capture all the light. This detector can work in the range of 800-1800 nm.

There are five sets of gratings for the monochromators - 0.25 µm, 0.5 µm, 1.0 µm, 2.0 µm, and 4.0 µm. The number indicates the wavelength at which the gratings perform the best. Typically, for UV-Vis measurements, you want to use the 0.5µm gratings, because the lamp is fairly weak at this wavelength, yet very intense at 1.0 µm. Thus, you're unlikely to get a usable signal at 500 nm with the 1.0 µm gratings, but you will still get a strong a signal at 1 µm when using the 0.5 µm gratings.

The Scanning Monochromator has an Oriel 70491 integrating sphere to make diffuse reflection measurements.

The Ocean Optics Spectrometer can make transmission, specular reflection, and diffuse reflection measurements on thin film, single crystal, and powder samples. Diffuse reflection measurements can only be made on strongly diffusely reflecting materials.

The Ocean Optics spectrometer has two detectors: Ocean Optics HR 4000 and Ocean Optics NIR256-2.5.

An Ocean Optics HR 4000 spectrometer was used to take the ultraviolet-visible spectra. The HR 4000 has a 3648-element CCD-array detector with optical resolution of 0.27 nm. The ultraviolet-visible measurements spanned a wavelength range from 200 nm to 1150 nm.

Ocean Optics NIR256-2.5 spectrometer was used to take the visible-near infer red spectra. The NIR256-2.5 has an InGaAs detector array with an optical resolution of 6.85 nm. The visible-near infer red measurements spanned a wavelength range of 850 nm to 2600 nm.

An Ocean Optics Mikropack DH-2000-BAL Deuterium Tungsten Halogen Light Source was used for the ultraviolet-visible measurements and an Ocean Optics Mikropack HL-2000 Tungsten Halogen Light Source was used for the visible-near infer red measurements. The spot size and incidence angle for both instruments are approximately 1.5 mm and 0 º.

• Levi Kilcher wrote an Excel sheet called index calc (2006 version is here) to analyze R & T data from the grating spectrometer, to get index, band gaps etc. Here is a help file for the index calc spreadsheet. See also Reports page for presentation, and Levi Kilcher's thesis on thesis page.
• Scout software is being implemented by Aaron Kratzer (2013). Working user manual

There is a manual for the OO spectrometer located permanently in Wngr 118. Never remove it from that room. The manual is based on some of the following documentation:

• HR4000_detector.pdf
• NIR256-2.5_detector.pdf
• OO Fiber Optic Spectrometer Manual written by Josh Russell; last updated 2009.
• Ocean Optics Walkthrough - Emmeline Altschul, 2011
• Filmetrics F20
• Filmetrix technical note