Inventor of photonic crystals visited the Nonlinear Optics group

During his trip to Chile, Sajeev John, the prestigous physicist from the University of Toronto (Canada), visited the Nonlinear Optics Division of our Center, located at the University of Chile. He toured the new nonlinear optics laboratory, and in the afternoon he gave a talk titled, “Photonics Band Gap Materials: Light-Trapping Crystals.”

Dr. Mario Molina, responsible researcher of the Nonlinear Optics Division, pointed out that Professor John was selected for the third time by newsgroup Thomson Reuters when predicting possible 2011 Nobel Prize winners.

“Thomson Reuters is known for its correct predictions, so it is hoped that Professor Johns will soon become a Nobel winner,” the researcher added.

The prestigious physicist will visit our Center Divisions at the University of Concepción next Thursday, December 29, where he will later give a talk at 4:30 p.m. The talk will be held in the meeting room of the EMPREUDEC building on the 2nd floor.

You may find more information about Sajeev John and the Nobel in the following link:


Photonic band gap (PBG) materials [1,2] are artificial periodic dielectric microstructures capable of trapping light in three-dimensions [3] on sub-wavelength scales without absorption loss. This offers new opportunities for efficient solar energy trapping and harvesting in suitably micro-structured thin films [4]. It also enables virtually complete control of the flow of light on microscopic scales in a 3D optical chip [5-7] as well as very strong coupling of light to matter where desired. By further engineering the electromagnetic density of states [8-10] within the chip it is possible to realize unprecedented coherent optical control of the quantum state of resonant atoms or quantum dots [11, 12]. This defines a fundamentally new strong-coupling regime for quantum optics. It enables multiple-wavelength channel optical logic to be performed on a chip on picosecond time scales at microwatt power levels. I discuss further consequences of light trapping in classical and quantum electrodynamics. I also discuss the challenges and requirements for materials fabrication to realize these remarkable effects.

1. S. John, Physical Review Letters 58, 2486 (1987)

2. E. Yablonovitch, Physical Review Letters 58, 2059 (1987)

3. S. John, Physical Review Letters 53, 2169 (1984)

4. A. Chutinan and S. John, Physical Review A 78, 023825 (2008)

5. A. Chutinan, S. John, and O. Toader, Phys. Rev. Lett. 90, 123901 (2003)

6. A. Chutinan and S. John, Physical Review B 72, 16, 161316 (2005)

7. A Chutinan and S. John, Optics Express 14 (3), 1266 (2006)

8. D. Vujic and S. John, Physical Review A 76, 063814 (2007)

9. R.Z. Wang and S. John, Physical Review A 70, 043805 (2004)

10. R.Z. Wang and S. John, J. Photonics and Nanostructures (Elsevier) 2, 137 (2004)

11. Xun Ma and Sajeev John, Physical Review Letters 103, 233601 (2009)

12. Xun Ma and Sajeev John, Physical Review A 80, 063810 (2009)

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