title: Laser-induced transient grating setup with continuously tunable period.
abstract: We present a modification of the laser-induced transient grating setup enabling continuous tuning of the transient grating period. The fine control of the period is accomplished by varying the angle of the diffraction grating used to split excitation and probe beams. The setup has been tested by measuring dispersion of bulk and surface acoustic waves in both transmission and reflection geometries. The presented modification is fully compatible with optical heterodyne detection and can be easily implemented in any transient grating setup.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: A
authors.initials: A
authors.lastname: Vega-Flick
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: J K
authors.initials: JK
authors.lastname: Eliason
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Maznev
authors.affiliation: Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, USA.
authors.forename: A
authors.initials: A
authors.lastname: Khanolkar
authors.affiliation: Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, USA.
authors.forename: M
authors.initials: M
authors.lastname: Abi Ghanem
authors.affiliation: Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, USA.
authors.forename: N
authors.initials: N
authors.lastname: Boechler
authors.affiliation: Applied Physics Department, CINVESTAV-Unidad Mérida, Carretera Antigua a Progreso Km 6, Cordemex, Mérida, Yucatán 97310 Mexico.
authors.forename: J J
authors.initials: JJ
authors.lastname: Alvarado-Gil
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: K A
authors.initials: KA
authors.lastname: Nelson