Joel A Greenberg, Postdoctoral Research Associate  

Joel A Greenberg

Office Location: 183 Physics
Office Phone: 919-660-2512
Email Address:
Web Page:

Atomic, molecular, and optical physics
Nonlinear dynamics and complex systems

PhD, Duke University, 2012
Certificate in Photonics, Duke, 2012
M.A., Duke University, 2008
BSE, Princeton University, 2005

Research Categories: Quantum Optics, Nonlinear Optics, fiber optics, Cold Atoms, quantum information computational imaging, slow light, x-ray imaging

Research Description: Light-based technologies, like fiber optics, have revolutionized how we communicate and receive information. In order to push optical information networks to their fundamental quantum limit, we require the capacity to control the degree to which light and matter interact (even down to the most fundamental, quantum level). To this end, I am looking into new ways to prepare matter (in my case, a gas of atoms) so that incident photons (light particles) interact with the matter with a controllable strength. More specifically, I am investigating new schemes that enable atoms to scatter light in a cooperative manner in order to "super charge" the nonlinear optical interaction between light and matter in a controllable way.

Typical Courses Taught:

  • Physics 265, Advanced optics
    This course presents a rigorous treatment of topics in Photonics and Optics targeted at students with an existing photonics or optics background. Topics will include, Optical Sources, Statistical Optics and Coherence Theory, Detection of Radiation; Nonlinear Optics; Waveguides and Optical Fibers; Modern Optical Modulators; Ultrafast lasers and Applications.

Recent Publications   (More Publications)

  1. J.A. Greenberg and D.J. Gauthier, Steady-state, cavity-less, multimode superradiance, submitted for publication (Submitted, 2012) .
  2. J.A. Greenberg and D.J. Gauthier, High-order optical nonlinearity at low light levels, submitted for publication (Submitted, 2012) .
  3. R. Zhang, J.A. Greenberg, M. C. Fischer and D. J. Gauthier, Controllable ultra-broadband slow light in a warm Rubidium vapor, J. Opt. Soc. Am. B, vol. 28 (2011), pp. 2578 .
  4. J.A. Greenberg, B.L. Schmittberger, and D.J. Gauthier, Bunching-induced optical nonlinearity and instability in cold atoms [Invited], Opt. Express, vol. 19 (2011), pp. 22535 .
  5. J.A. Greenberg and D.J. Gauthier, Superradiance in an Ultracold Thermal Vapor, in OSA Optics and Photonics Congress Technical Digest (2009)  [abs].

Curriculum Vitae

I am interested in studying nonlinear optics at low light levels. Because the nonlinear response of a material is typically very small, large intensities (i.e., large numbers of photons) are needed to see significant nonlinear effects. In my research, I am investigating ways to enhance the material's nonlinear susceptibility by coherently modifying its properties.

Selected Talks

  1. Super-charging nonlinear optical processes via cooperative effects., July 6, 2010, Foz do Iguazu, Brazil    
  2. Lamb-Dicke-enhanced free-space superfluorescence in a cold thermal vapor., May 20, 2010, Houston, TX    
  3. Superradiance in an ultracold thermal vapor, July 15, 2009, OSA NLO (Honolulu, HI)    
  4. Transient enhancement of the nonlinear atom-photon coupling via recoil-induced resonances, May 22, 2009, DAMOP (Charlottesville, VA)    
  5. Investigation of the Saturation Mechanism of Recoil-induced Resonances, July, 2008, DAMOP (State College, PA)    
Selected Other

  1. Momentum-state Engineering via Recoil-Induced Resonances, September, 2008, Poster presented at annual Fitzpatrick Insitute of Photonics meeting (Duke University, NC)    
  2. Nonlinear Beam Shaping in an Anisotropic Magneto-optical Trap, July, 2008, Poster presented at DAMOP (State College, PA)    
  3. Anisotropic MOT for Nonlinear Optical Studies, September, 2007, Poster presented at annual Fitzpatrick Insitute of Photonics meeting (Duke University, NC)    
  4. Anisotropic MOT for Nonlinear Optical Studies, July, 2007, Poster Presented at Atomic Physics Gordon Conference (Tilton School, NH)    
  5. Theoretical Optimization of a DAVLL System in Rubidium Vapor, September, 2006, Poster presented at annual Fitzpatrick Insitute of Photonics meeting (Duke University, NC)    
  6. Determining the ANCs for 13C 12C+n for Nuclear Astrophysics Studies, October, 2004, Poster Presented at APS DNP meeting (Chicago, IL)