SQOD

On the period between 1 June (2010) and 31 May (2012), I have been leading the project Solid-state Quantum Optical Devices (SQOD), project ID 254331, in the group of Prof. Jonathan Finley (head of the Nanostructure Photonics Group and scientist in charge) in the context of a European Union grant, a so-called Intra-European Fellowships (IEF) for Career Development, in the FP7--PEOPLE-2009-IEF call.

Main topics

1. Frequency correlations (with Elena del Valle et al.)
2. Quantum nonlinearities (with Michael Schrapp & Arne Laucht).
3. Fluctuation-induced luminescence from QDs (with Vase Jovanov et al.)

Results

By far, the most important result has been the successful implementation of the theory of time- and frequency-resolved multiphoton correlations. The following excerpt from the vision shared with the European Union's panel of experts, gives the basic picture I had at the time:

It doesn't explain how this could be achieved, and I had close to little idea. I later formulated it as a problem of putting detectors since the integral approach was repelling to me, but the main insight of the "sensors" (and this terminology) as a mathematical limit from putting detectors, as well as the proof of equivalency with photodetection integrals, came from Elena, whom I had interested into the problem and who readily solved it. We had invited Tejedor's PhD student Alejandro Gonzalez Tudela for a research stay and the main results were obtained at home, where he was also staying, with his support on checking calculations and implementing numerical routines.

In my original version, there was more physics from the detection than should really be, like the possibility to saturate them. In fact, it turns out the original idea was not that mistaken as it could actually be implemented but using the cascaded formalism that "disconnects" the detectors from the system, what Elena had independently discovered with her sensing approach that works great for Glauber correlators which compute limits anyway of ratio of vanishing quantities. We would need, and rediscover independently, the cascaded approach when we wanted to implement a Monte Carlo version, which we would later do with Camilo.

Scientific Output

Publications

1. Mollow Triplet under Incoherent Pumping. E. del Valle and F. P. Laussy in Phys. Rev. Lett. 105:233601 (2010).
2. Luminescence spectra of quantum dots in microcavities. III. Multiple quantum dots. F.P. Laussy, A. Laucht, E. del Valle, J. J. Finley and J. M. Villas-Bôas in Phys. Rev. B 84:195313 (2011).
3. Phase-Space of Strong Coupling of Two Bosonic Modes. F. P. Laussy and E. del Valle in AIP Conf. Proc. 1399:585 (2011).
4. Microcavities, A. Kavokin, J. J. Baumberg, G. Malpuech and F. P. Laussy, Oxford University Press (2011).
5. Regimes of strong light-matter coupling under incoherent excitation. E. del Valle and F. P. Laussy in Phys. Rev. A 84:043816 (2011).
6. Generation of a two-photon state from a quantum dot in a microcavity. E. del Valle, A. González-Tudela, E. Cancellieri, F. P. Laussy and C. Tejedor in New J. Phys. 13:113014 (2011).
7. Dephasing of strong coupling in the nonlinear regime. A. González-Tudela, E. del Valle, E. Cancellieri, C. Tejedor, D. Sanvitto and F. P. Laussy in AIP Conf. Proc. 1399:975 (2011).
8. Correlation between emission intensity of self-assembled germanium islands and quality factor of silicon photonic crystal nanocavities. N. Hauke, S. Lichtmannecker, T. Zabel, F. P. Laussy, A. Laucht, M. Kaniber, D. Bougeard, G. Abstreiter, J. J. Finley and Y. Arakawa in Phys. Rev. B 84:085320 (2011).
9. Exciton-polaritons in microcavities. F.P. Laussy in Exciton-polaritons in microcavities 172:1-42 (2012).
10. Luminescence spectra of quantum dots in microcavities. F. P. Laussy, E. del Valle, A. Laucht, A. González-Tudela, M. Kaniber, J. J. Finley and C. Tejedor in Chap. 9 of "Quantum optics with semiconductor nanostructures", Woodhead Publishing (2012).
11. Superconductivity with excitons and polaritons: review and extension. F. P. Laussy, T. Taylor, I. A. Shelykh and A. V. Kavokin in J. Nanophoton. 6:064502 (2012).
12. Universal signatures of lasing in the strong coupling regime. F. P. Laussy, E. del Valle and J.J. Finley in Proc. SPIE 8255:82551G (2012).
13. Generation of a two-photon state from a quantum dot in a microcavity under incoherent and coherent continuous excitation. E. del Valle, A. González-Tudela and F. P. Laussy in Proc. SPIE 8255:825505 (2012).
14. Quantum dynamics of damped and driven anharmonic oscillators. M. Schrapp, E. del Valle, J. J. Finley and F. P. Laussy in Phys. Stat. Sol. C 9:1296 (2012).
15. Universal signatures of lasing in the strong coupling regime. F. P. Laussy, E. del Valle and J.J. Finley in Proc. SPIE 8255:82551G (2012).
16. Climbing the Jaynes-Cummings ladder by photon counting. F. P. Laussy, E. del Valle, M. Schrapp, A. Laucht and J. J. Finley in J. Nanophoton. 6:061803 (2012).
17. Theory of Frequency-Filtered and Time-Resolved $N$-Photon Correlations. E. del Valle, A. González-Tudela, F. P. Laussy, C. Tejedor and M. J. Hartmann in Phys. Rev. Lett. 109:183601 (2012). 

Edited volume

1. New Journal of Physics focus issue on Cavity and Circuit Quantum Electrodynamics in Solids, Ed. with J. Finley, Y. Arakawa, J. Vuckovic, E. Solano and R. Gross.

Unpublished

1. Fluctuation induced luminescence sidebands in the emission spectra of resonantly driven quantum dots, F. P. Laussy, V. Jovanov, E. del Valle, A. Bechtold, S. Kapfinger, K. Müller, S. Koch, A. Laucht, T. Eissfeller, M. Bichler, G. Abstreiter, J. J. Finley arXiv:1207.6952

Invited Talks

Talks

1. MIFP March meeting 2011, 18 March (2011).
2. MIFP March meeting 2012, 23 March (2012).
3. XXXV Encontro Nacional de Física da Matéria Condensada (ENFMC 2012) in Águas de Lindóia, May 2012.

Seminars

1. Arbeitsgruppe Theoretische Festkörperphysik seminar of Universität Bremen, Bremen (Germany) 9 November (2010).
2. SFB 787 Halbleiter-Nanophotonik seminar of the Technische Universität Berlin, Berlin (Germany) December (2010).

Contributed Talks

1. 18th International Symposium NANOSTRUCTURES: Physics and Technology, Saint Petersburg (Russia), June 2010.
2. ICPS30, Seoul (Korea), July 2010.
3. SOLID workshop in Garching (Germany), October 2010.
4. PLMCN11 conference in Berlin (Germany), April 2011.
5. LASE SPIE Photonics West in San Francisco (United States), January 2012.
6. DPG Spring Meeting in Stuttgart (Germany) in the Q9: Quanteneffekte: Interferenz und Korrelationen session, March 2012.
7. PLMCN12 conference in Hangzhou (China) June 2012.
8. ICPS 2012 in Zurich (Switzerland), August 2012.

Posters

1. PLMCN11 conference in Berlin (Germany), April 2011.
2. NanoTUM workshop in Garching (Germany), 1st June 2011.
3. ICPS12 in Zurich (Switzerland), August 2012.

Michael Schrapp

Michael was a theory diploma student in the WSI working in the thematics of the SQOD project. He published two papers, one as first-author, attended one international conference and a few other events and presented two posters. He went on to do carry out a Ph.~D in Siemens on "artifact reduction in computed tomography".

Follow-up of the project

I got awarded a Ramón y Cajal position, partly thanks to the outputs of this project. While it is administratively finished, there is still direct scientific collaboration going on, much of it to be directly associated to the SQOD project (?!).

Links

• My page at the WSI.

Proposal

• Part B