Generation of Single Dispersion Precompensated 1-fs Pulses by Shaped-Pulse Optimized High-Order Stimulated Raman Scattering

Abstract

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Colloquium: Aligning molecules with strong laser pulses

“…During the past few years the field of intense laser alignment has been growing rapidly, with an ever increasing number of contributions from both experimental Felker, 1996, 1997;Larsen et al, 1998Larsen et al, , 2000Sakai, Safvan, 1998;Lappas and Marangos, 2000;Baumfalk, Nahler, and Buck, 2001;Rosca-Pruna and Vrakking, 2001, 2002a, 2002bVelotta et al, 2001;Bartels et al, 2002;Poulsen, Skovsen, and Stapelfeldt, 2002;Sakai et al, 2002) and theoretical (Friedrich and Herschbach, 1995aSeideman, 1995bSeideman, , 1999aSeideman, , 1999bSeideman, , 2001aSukharev and Krainov, 1998;Andryushin and Fedorov, 1999;Dion, Bandrauk, Atabek, Keller, Umeda, and Fujimura, 1999;Henriksen, 1999;Ortigoso et al, 1999;Yan and Seideman, 1999;Keller, Dion, and Atabek, 2000;Larsen et al, 2000;Legare, Chelkowski, and Bandrauk, 2000;Averbukh and Arvieu, 2001;Cai, Marango, and Friedrich, 2001;Dion, Keller, and Atabek, 2001;Hoki and Fujimura, 2001;Machholm, 2001;Machholm and Henriksen, 2001;Dion et al, 2002;Guerin et al, 2002;Kalosha et al, 2002;Van Leuven, Malvaldi, and Persico, 2002) research. Recent work has analyzed the role played by various system...…”

“…Recent work has analyzed the role played by various system properties (Ortigoso et al, 1999), developed a genetic algorithm to optimize strong field orientation Ben Haj Yedder et al, 2002;Dion et al, 2002), discussed the alignment of vibrationally excited states (Legare, Chelkowski, and Bandrauk, 2000), and introduced a variety of new and exciting applications of laser alignment (Seideman, 1997a(Seideman, , 2001bLappas and Marangos, 2000;Velotta et al, 2001;Bartels et al, 2002;Kalosha et al, 2002). Several of these applications are discussed in Sec.…”

Mapping the evolution of optically generated rotational wave packets in a room-temperature ensemble ofD2

“…Traditional 'brute force' techniques employing strong DC fields [2,3] have recently yielded to new, more subtle and yet more powerful and versatile techniques using intense laser systems [4,5]. In particular intense femtosecond pulses have been successfully used to align molecules along an axis for application in areas such as the study of fragmentation dynamics [6,7], high harmonic generation [8,9] and the creation of single cycle laser pulses [10]. In this case the alignment of a molecule (or spatial ordering of an ensemble of molecules) evolves temporally following the creation of a rotational wavepacket by a linearly polarized laser pulse of far shorter duration than the natural period of rotation.…”

“…This can allow time-and energy-resolved measurements of the electronic and nuclear motion with spectroscopic accuracy. Considerable efforts are underway to perfect ultrashort (≤ 5 femtoseconds) pulse generation through molecular phase modulation [10]. By impulsively aligning a high pressure Raman-active gas (short rotational period makes D 2 a natural choice) in a hollow waveguide with an ultrafast pump pulse, a locally-aligned rotational revival propagates along the waveguide at the speed of light in the medium, and the molecular motion causes a strong phase modulation due to the refractive index change.…”

Orienting coupled quantum rotors by ultrashort laser pulses

“…Furthermore, a specially designed sequence of pulses is known to achieve an enhanced angular focusing in quantum rotors [12,13]; this has been realized experimentally in optical lattices [14]. These types of alignment, which differ from the adiabatic, are important for manifold applications requiring transient molecular alignment under field-free conditions, such as the generation of laser pulses [15,16] and the control of high harmonic generation as a source of coherent radiation [17].…”