Physics Department Calvin College

Stanley L. Haan

Professor of Physics
Calvin College
3201 Burton SE
Grand Rapids, MI 49546

Phone: 616-526-6339
Office: SB-160
Fax: 616-526-6501

email: haan@calvin.edu


Introduction
I've been at Calvin College since 1983. Before then I was a postdoc at JILA in Boulder, Colorado, and an assistant professor at the University of Colorado at Denver. My training is in theoretical atomic physics (Ph.D., Colorado), and I have an active research project in atomic physics. I'm also interested in science education, particularly as relating to elementary-school science education.

I summarize my professional activities below.

My research
I've run a Calvin-based research project since 1987, with continuous support from the National Science Foundation. I've supervised at least one fulltime student assistant every summer, except for one year when I was away on sabbatical. Through summer 2009, I've supervised 27 different fulltime students, filling 40 fulltime summer research positions.

Science Education
In spring of 1986 I began teaching a course specifically designed for elementary education students. I soon realized that I needed to adapt my teaching techniques to meet the needs of students without a science background, so I started reading about educational psychology and science education. Almost very semester since then, I have taught at least one course specifically for elementary education students. I've also been involved in hiring other faculty to work specifically with elementary education students, and together we've developed new content and methods courses for elementary education students. I have 3 papers relating to science education or science teaching, including one Viewpoint in "APS News" and one paper that describes a course for elementary education students that Professor Jim Jadrich and I developed [Stanley L. Haan and James Jadrich,, "A thematic integration of physical and earth science for elementary education students," Journal of College Science Teaching 28, 331-335 (March/April 1999)].

More details about my research

In the past few years my primary research focus has been on double ionization of atoms by intense laser fields. This work is done in cooperation with Professor J.H. Eberly of the University of Rochester. We've collaborated ever since I spent a sabbatical in Rochester during 1992-3. I also have an interest in photorecombination (a process in which an electron "recombines" with a postive ions and emits light), but have not published or presented in this area since 2004. The photorecombination work was done with Dr. Verne Jacobs of the Naval Research Lab.

Off-campus presentations by me or my students, 2003-present (* indicates Calvin student), in reverse chronological order. Presentations by Rochester collaborators are NOT included:

"Non-Sequential Double Ionization of Atoms by Intense Infrared and Visible-Wavelength Lasers: A Fully Classical Analysis" S.L. Haan, Physics Department Colloquium, Western Michigan University, October, 2009.

"3D Classical Modelling of Non-Sequential Double Ionization: Recollision Excitation, Escape, Drift, and Possible Reattachment," S.L. Haan, Z.S. Smith,* K.N. Shomsky,* P.W. Plantinga,* and T.L. Atallah,* Super Intense Laser Atom Physics (SILAP) conference, Zion Park, USA, invited presentation, September 2009.

"Classical modeling of non-sequential double ionization: recollision, time-delayed ionization, drift, and possible reattachment," S.L. Haan, Z.S. Smith,* K.N. Shomsky,* and P.W. Plantinga*, Poster Presentation, XXVI International Conference on Photonic, Electron, and Atomic Collisions (ICPEAC), Kalamazoo, MI, July 2009.

"Classical Modeling of Non-Sequential Double Ionization: Recollision, Ionization, Drift, and Possible Reattachment," S.L. Haan, Z.S. Smith,* K.N. Shomsky,* and P.W. Plantinga,* invited presentation, 18th International Laser Physics Workshop, Barcelona, Spain, July 2009.

"Double Ionization of Atoms by Strong Laser Fields: Classical Physics Works," S.L. Haan, Quantum Optics Seminar, University of Rochester, Rochester NY, November 2008.

"Correlated Electron Pairs in Double Ionization of Atoms by Strong Laser Fields," S.L. Haan, Z.S. Smith,* K.N. Shomsky,* and P.W. Plantinga,* poster presentation, ICOMP 2008, Heidelberg, Germany, September 2008.

"Recollision Excitation, Correlated Electron Pairs, and High-Energy Electrons in Classical Ensemble Studies of Double Ionization," S.L. Haan, Z. Smith,* and J. VanDyke,* invited presentation, 17th International Laser Physics Workshop (LPHYS'08), Trondheim, Norway, July 2008.

"Correlated Electron Pairs and Recollision Excitation in Double Ionization," S.L. Haan, Z. Smith,* and J. VanDyke,* oral presentation at DAMOP, Penn State University, May, 2008. (http://meetings.aps.org/Meeting/DAMOP08/Event/85057)

"Double Ionization of Atoms in Intense Laser Fields," S.L. Haan, KITP Miniprogram: Theoretical Physicists at Primarily Undergraduate Institutions, Kavli Institute for Theoretical Physics, Santa Barbara, CA, July 2007. (Tallk available online (check7/17, 4:30pm))

"Classical Ensemble Studies of Double Ionization of Atoms at =390 nm," S.L. Haan and Zach Smith, oral presentation at DAMOP, Calgary, Alberta, June 2007. (Bull. Am. Phys. Soc. 52, No. 7, 132 Q2 (2007)).

"Classical Ensemble Studies of Strong-Field Double Ionization of Atoms," Zach Smith* and S.L. Haan, contributed talk by student Zach Smith at the Ohio Section of the American Physical Society, May, 2007.

"Recollision, Time Delay, and Double Ionization studied with 3-D Classical Ensembles," S.L. Haan. A. Karim,* and J.H. Eberly, invited presentation at Laser Physics 2006, Lausanne, Switzerland, July 2006. Click here to view the talk.

"Electron Momentum Distributions in Short-Pulse Double Ionization: Agreement with a Classical Model in 3D," Stan Haan, Llian Breen,* Armin Karim,* and J.H. Eberly, contributed talk at DAMOP 2006, Knoxville, TN, May 2006. This talk was presented by Calvin student Armin Karim. Click here to view the talk. (A photo of Armin and me in Tennessee is at left.)

"Three-Dimensional Classical-Ensemble Modeling of Non-Sequential Double Ionization," S.L. Haan, L. Breen,* D. Tannor,* R. Panfili, Phay J. Ho and J.H. Eberly, invited presentation, Heraus Seminar on High-Field Attosecond Physics, Obergurgl, Austria, January 2005.

"Classical and Quantum Studies of Strong-Field Double Ionization in Model Atoms," S.L. Haan, invited presentation, Laser Physics 2004, Trieste, Italy, July 2004.

"Classical Modeling of Double Ionization of Atoms in Intense Laser Fields," S.L. Haan, A. Vache,* and L. Breen,* oral presentation at DAMOP, Tucson, AZ, May 2004.

"Informal strong-field update -- 3D classical simulations of double ionization of atoms," S.L. Haan, Quantum Optics Seminar, University of Rochester, Rochester, NY, March 2004.

"Quantum Mechanical and Classical Studies of Strong-Field Double Ionization in Model Atoms," S.L. Haan, invited presentation at SILAP (Super-Intense Laser-Atom Physics), Dallas, TX, November, 2003.

"Quantum Mechanical Masking in Strong-Field Double Ionization of Atoms," S.L. Haan and J.H. Eberly, invited presentation at Laser Physics 2003, Hamburg, Germany, August, 2003.

"Classical Analysis of Double Ionizaton of Atoms in Strong Laser Fields: Is Single Ionization Necessary First?," S.L. Haan and C. Cully, * invited talk at Laser Physics 2003, Hamburg, Germany, August, 2003.

"Classical Analysis of Double Ionization of Atoms in Strong Laser Fields: Is Single Ionization Necessary First?", S.L. Haan and C. Cully,* poster presentation at DAMOP, Boulder CO, May, 2003.


Publications, 2004-present, in reverse chronological order, again with * indicating an undergraduate assistant:

S.L. Haan, Z.S. Smith,* K.N. Shomsky,* P.W. Plantinga,* and T.L. Atallah,* "Anticorrelated Electrons from High-Intensity Nonsequential Double Ionization of Atoms," Phys. Rev. A 81, 023409 (2010).

K.N. Shomsky,* Z.S. Smith,* and S.L. Haan, "Frustrated Ionization in Non-Sequential Double Ionization: A Classical Model," Phys. Rev. A 79, 061402(R) (2009).

S.L. Haan, Z.S. Smith,* K.N. Shomsky,* and P.W. Plantinga,* "Electron Drift Directions in Strong-Field Double Ionization of Atoms," J. Phys. B 42, 134009 (2009).

S.L. Haan, Z.S. Smith,* K.N. Shomsky,* and P.W. Plantinga,* "Anticorrelated Electrons from Weak Recollisions in Non-Sequential Double Ionization," J. Phys. B: At. Mol. Opt. Phys. 41 (2008) 211002. This paper was selected for inclusion in IOP Select (November 2008), and was highlighted in Europhysics News 40, Number 1, page 15, (2009).

S.L. Haan, Z.S. Smith,* and J.S. VanDyke,* "Recollision Excitation, Electron Correlation, and the Production of High-Momentum Electrons in Double Ionization," Phys. Rev. Lett. 101, 113001 (2008).

S.L. Haan and Z.S. Smith,* "Classical explanation for electrons above the 2Up cutoff in strong-field double ionization at 390 nm", Phys. Rev. A. 76, 053412 (November 2007).

S.L. Haan, L. Breen,* A. Karim,* and J.H. Eberly, "Recollision Dynamics and Time Delay in Strong-Field Double Ionization," Optics Express 15, 767-778 (February 2007).

S.L. Haan, L. Breen,* A. Karim,* and J.H. Eberly, "Variable time lag and backward ejection in full-dimensional analysis of strong-field double ionization," Physical Review Letters 97, 103008 (8 September 2006). Republished in Journal of Ultrafast Science 5, Issue 10 (October 2006).

S.L. Haan, "Wavefunction Masking and Strong-Field Double Ionization," Laser Physics 15, 1413-1420 (October 2005). Click for a reprint in pdf format.

Phay J. Ho, R. Panfili, S.L. Haan, and J.H. Eberly, "Nonsequential double ionization as a completely classical photoelectric effect," Phys. Rev. Lett. 94, 093002 (2005). Republished in Journal of Ultrafast Science 4, Issue 4 (April 2005).

S.L. Haan, J.C. Cully,* and K. Hoekema,* "Speed-up collisions in strong-field double ionization," Optics Express 12, 4758-4767 (2004).

Ehud Behar, Verne L. Jacobs, Joseph Oreg, Avi Bar-Shalom, and Stanley L. Haan, "Effects of Quantum Interference Between Radiative and Dielectronic Recombination on the Photo-Recombination Cross Section Profiles of the He-Like Ions Ar16+ and Fe24+," Phys. Rev. A 69, 022704-1 (2004).




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