Infrared photochromism in a quantum crystal: laser pumping and probing in solid para-H2 doped with CH3F |
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Authors: | McKellar A R W Mizoguchi Asao Kanamori Hideto |
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Institution: | Department of Physics, Tokyo Institute of Technology, Ohokayama 2-12-1, Tokyo 152-8551, Japan. |
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Abstract: | Solid para-H(2) doped with CH(3)F at 1.8 K is studied in the ν(3) region (~1040 cm(-1)) using a quantum cascade laser source. Residual ortho-H(2) gives rise to distinct spectral features due to CH(3)F-(ortho-H(2))(N) clusters with N = 0, 1, 2, etc. The laser power (~30 mW) is sufficient to significantly affect the sample, enabling novel photochromism experiments to be performed on a solid para-H(2) matrix-isolated sample. It is found that population can be reversibly transferred between the N = 1 line and satellite features close to the N = 0 line. |
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