Observation of Phase-Matched Relativistic Harmonic Generation

Phase dependence of Thomson scattering in an ultraintense laser field

“…As the laser intensity increases, various nonlinear phenomena emerge, [1][2][3][4] such as ''figure-8'' orbits, [5][6][7][8][9] nonlinear Thomson scattering, 2,4 -10 harmonic generation, 2,6,[10][11][12][13][14][15][16] self-focusing of the laser pulse in a plasma channel, [17][18][19][20] etc. These nonlinear phenomena play key roles in proposed table-top accelerators and x-ray sources.…”

Backscattering of an Intense Laser Beam by an Electron

“…Colliding such energetic photons to create particles through the inverse process has advantages over direct particle collisions because of reduced beamstrahlung and disruption. The results of numerous experiments [1][2][3][4][5][6], theories [7][8][9][10][11][12][13][14][15][16][17][18][19][20], and reviews [21,22] related to these topics have been published.…”

Relativistic Nonlinear Thomson Scattering: Toward Intense Attosecond Pulse

“…This is referred to as relativistic nonlinear Thomson scattered (RNTS) radiation. The RNTS radiation has been investigated in analytical ways (Esarey et al, 1993a;Chung et al, 2009;Vachaspati, 1962;Brown et al, 1964;Chen et al, 1998;Ueshima et al, 1999;Chen et al, 2000;Kaplan & Shkolnikov, 2002;Banerjee et al, 2002). Recently, such a prediction has been experimentally verified by observing the angular patterns of the harmonics for a relatively low laser intensity of 4.4x10 18 W/cm 2 (Lee et al, 2003a(Lee et al, , 2003b.…”

“…In fact, for wider exploration and manipulation of electron dynamics in a vast spectrum of natural phenomena, attosecond or a few fs keV pulses are demanded. Several schemes have been proposed and/or demonstrated to generate an ultrashort keV xray pulse: the relativistic Doppler shift of a backscattered laser pulse by a relativistic electron beam Hartemann, 1998;Esarey et al, 1993a;Chung et al, 2009), the harmonic frequency upshift of a laser pulse by relativistic nonlinear motion of electrons (Vachaspati, 1962;Brown & Kibble, 1964;Esarey et al,, 1992;Chen et al, 1998Chen et al, , 2000Ueshima et al, 1999;Kaplan & Shkolnikov, 2002;Banerjee et al, 2002;Lee et al, 2003aLee et al, , 2003bLee et al, , 2005Lee et al, , 2008Phuoc et al, 2003;Kim et al, 2009), high order harmonic generation in the interaction of intense laser pulse with solids (Linde et al, 1995(Linde et al, , 1996Norreys et al, 1996;Lichters et al, 1996;Tarasevitch et al, 2000) and x-ray laser using inner shell atomic transitions (Kim et al, 1999(Kim et al, , 2001. Ultrafast high-intensity X-rays can be generated from the interaction of high intensity femtosecond laser via Compton backscattering (Hartemann et al, 2005), relativistic nonlinear Thomson scattering (Ueshima et al, 1999;Kaplan & Shkolnikov 2002;Banerjee et al, 2002) and laser-produced betatron radiation (Phuoc et al, 2007).…”