Abstract
Silicon (111) [Si(111)] surfaces both with and without a thin film of polystyrene are investigated with sum-frequency generation (SFG) spectroscopy with -polarized visible and -polarized infrared inputs. On uncoated Si, the nonresonant polarization changes from to , with the maximum signal in each polarization component repeating every 60° of sample rotation. With polystyrene on Si(111), the resonant features go in and out of phase with the nonresonant signal every 120°. The resonant response is only polarized, as expected; however, the nonresonant response again switches between and polarizations. Implications for proper collection and interpretation of SFG spectra from crystalline substrates are discussed.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Bolei Xu, Yajing Wu, Dezheng Sun, Hai-Lung Dai, and Yi Rao
Opt. Lett. 40(19) 4472-4475 (2015)
Isaac G. Prichett and Aaron M. Massari
Opt. Lett. 43(19) 4747-4750 (2018)
Timothy C. Anglin and Aaron M. Massari
Opt. Lett. 37(10) 1754-1756 (2012)