Hole-Burning Spectroscopy
   
   
John R. Lombardi and Larry Johnson
   
  
  Hole-burning spectroscopy utilizes the high resolution, high intensity properties 
  of a dye laser to remove from an inhomogeneously broadened spectral line a 
  narrow, homogenous line causing the appearance of a dip (hole) in the resultant 
  spectrum. The hole may be either photochemical or photophysical. This enables 
  high resolution studies of biologically important molecules which normally have 
  only low resolution spectroscopy at low temperatures. Our work has included 
  Stark effects to determine accurate excited state dipole moments, as well as 
  studies of the effect of amorphous surroundings on the effective dipole moment 
  of the molecule. 
     
 

  1. "Stark Hole-Burning Spectroscopy," with L. Johnson, The Laser Journal,
       7, 1 (1986).

  2. "Stark Effect on the 580 nm S1 - S0 Transition of Isobacteriochlorin Using
      Photochemical Hole-Burning  Spectroscopy" with L.W. Johnson,M.D. Murphy,
      C. Pope, and M. Foresti, J. Chem. Phys., 86, 4335 (1987).

3. "Stark Effect on the S1 - S0 Transition of 1,4 Dihydroxyanthraquinone" with L.W.
    Johnson, M.D. Murphy, C. Pope, and M. Foresti, J. Chem. Phys., 86,3048 (1987).

4. "On the Comparason of Solvatochromic Shifts with Gas Phase Stark Effect
     Measurements", Spectrochim. Acta, 43A, 1323 (1987).

5. "Effective Dipole Moment Changes as a Probe of Guest-Host Interactions in
    Amorphous Materials at Low Temperatures", Abdullah Cavus and John R.
    Lombardi, J.Phys. Chem., 97, 9977 (1993).

6. "Effective Dipole Moment Changes as a Probe of Guest-Host Interactions
     in Amorphous Materials at Low Temperatures", Abdullah Cavus and John R.
     Lombardi, J.Phys. Chem., 97, 9977 (1993).

7. "Stark Hole Burning Spectroscopy of Cresylviolet Perchlorate in
     Amorphous  Hosts", Abdullah Cavus, Michelle Wright, Fuat Bayrakceken,
     John R.  Lombardi, Spectroscopy Lett. 32,1 (1999).

8. "Excitation, Hole-burning, and Stark Spectroscopy of Free Base Isobacteriochlorin in
     an n-Octane Matrix at Liquid Heluim Temperatures", Benjamin L., Davis and John
     R. Lombard, J. Phys. Chem., 105, 6581 (2001).

 
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