Entity

Time filter

Source Type


Kuehn W.,Max Bom Institute For Nichtlineare Optikund Kurzzeitspektroskopie | Reimann K.,Max Bom Institute For Nichtlineare Optikund Kurzzeitspektroskopie | Woerner M.,Max Bom Institute For Nichtlineare Optikund Kurzzeitspektroskopie | Elsaesser T.,Max Bom Institute For Nichtlineare Optikund Kurzzeitspektroskopie | Hey R.,Paul Drade Institute For Festkorperelektronik
Journal of Physical Chemistry B | Year: 2011

We discuss a novel approach for nonlinear two-dimensional (2D) spectroscopy in the terahertz (THz) frequency range which is based on a collinear interaction geometry of a sequence of THz pulses with the sample. The nonlinear polarization is determined by a phase-resolved measurement of the electric field transmitted through the sample as a function of the delay T between two phase-locked pulses and the "real" time t. The information provided by a single 2D scan along the T and t axes is equivalent to that from a noncollinear photon-echo setup equipped with four local oscillators, each interacting with adifferent diffracted order. We address basic concepts of collinear 2D THz spectroscopy, in particular data analysis and phasing issues. Different rephasing and nonrephasing contributions to the third-order response are separated and 2D correlation spectra derived. As a prototype application, 2D correlation spectra of intersubband excitations of electrons in semiconductor quantum wells are presented. © 2010 American Chemical Society. Source

Discover hidden collaborations