title: Infrared photochromism in a quantum crystal: laser pumping and probing in solid para-H2 doped with CH3F.
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.
authors: Department of Physics, Tokyo Institute of Technology, Ohokayama 2-12-1, Tokyo 152-8551, Japan.
authors: A R W
authors: AR
authors: McKellar
authors: Asao
authors: A
authors: Mizoguchi
authors: Hideto
authors: H
authors: Kanamori