Microscopic and Macroscopic Raman Scattering Spectroscopy

Charge coupled device detector (CCD) and solid state laser (DPSS) at 532 nm have been supplied for the first time after my arrival at Wakayama University ten years ago. This enables me to do research Raman spectrosopic measurements on condensed matters. I have written this homepage to congratuate the occasion. I thank Mr. Yatagai of Seishin shoji and Dr. Suzuki of Roper Japan for their skill in adjusting spectrometer and CCD, respectively. In March 2011, after big earthquake in Tohoku, an olympus microscopy has been added to our Raman system.

Picture Caption
Raman spectroscopy set-up. Double spectromator is a Spex 1404 focal length 85 cm with a pair of 1800 mm-1 diffraction gratings. The excitation lasers are dual 457nm and 515nm (both 50mW) from cobolt, a green (532 nm , 150 mW) laser from Elforlight , a yellow(561nm, 50 mW) and red (660 nm, 100mW) from Cobolt, and of no-use red (785 nm, 80 mW) from Crsytalaser. CCD is a Python 100BR from Princeton Insturuments (liquid-N2 cooled, 1350 x 100 pixels, back illumination).

For setting up this macro Raman system, several optical parts and filters had to be prepared. Prof. Harima and Prof. Gu supplied me several optics hardwares. The financial supports from Only-One project and University President's decretion budjet are appreciated. Spectrum below is the very first Raman signal from Si substrate.

Next two figures are Raman signals from single wall cabon nanotubes.

I had demonstrated that our system could obtain Raman spectra from single walled carbon nanotubes on silicon substrate in macro geometry(SWNT sample from Mr. Hirata of KIT.)

Above figure shows microscopic Raman singal of SWNTs (supplied by Prof. Itoh.)

Cyostat for micro Raman spectroscoy

The cryostat below has been equipped with our micro Raman set-up in this March.

Another experimental set-ups

Field-emission SEM(JEOL) JSM-7610F and Raman/AFM/SNOM(WITek) Alpha-RAS+ have just added to our research Group.