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High-harmonic generation setup

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Location Contact
Laboratorium für Physikalische Chemie
ETH Zürich
Wolfgang-Pauli-Str. 10
8093 Zürich
 
 Andres Tehlar
Tel +41 44 633 42 61
&anz&drj$esw&.td*ehw-lak1r@c-phk.ysq$.cv/heu6m.r6etw8hze6.co)hz

 

Setup / Configuration

  • Supersonic gas jet for generation of cold molecular samples
  • XUV imaging spectrometer consisting of:
  • concave flat-field grating
  • 80 mm diameter micro-channel plate phosphor screen assembly
  • CCD camera
                                            
 

Literature

  • A. Rupenyan, J. B. Bertrand, D. M. Villeneuve, and H. J. Wörner, "All-optical measurement of high-harmonic amplitudes and phases in aligned N2 molecules", Phys. Rev. Lett. 108, 033903 (2012)
  • D. Kiselev, P. M. Kraus, L. Bonacina, H. J. Wörner and J.-P. Wolf, „Direct shaping of high harmonics in the extreme ultraviolet”, Optics Express 20, 25843 (2012)
  • P.M. Kraus, A. Rupenyan and H. J. Wörner, “High-harmonic spectroscopy of oriented OCS molecules: emission of even and odd harmonics”, Phys. Rev. Lett. 109, 233903 (2012)

                       

W31

The setup consists of two chambers. In the source chamber (right-hand side of the picture), high harmonics are generated in a supersonic gas jet (rotational temperature ~ 10 K) using femtosecond infrared pulses. 
 The generated light propagates into a differentially pumped XUV imaging spectrometer (left side), where a grating disperses the light in the horizontal dimension while allowing free divergence in the vertical dimension. The spectrally-resolved far-field profile is imaged by a MCP-phosphor-screen assembly and a CCD camera. The gas jet can be heated or cooled to reach temperatures between 20 and 150°C. In the source chamber, an ion detector is installed that measures the total ion yield generated during the HHG process. A flexible optical setup in front of the chamber allows for a variety of pump-probe experiments with femtosecond pulses ranging from 200 to 2600 nm.


 
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