Resonant coupling of quantum dot intersublevel transitions with midinfrared photonic crystal modes

Homeyer, E.; Houel, J.; Checoury, X.; Delgehier, F.; Sauvage, S.; Boucaud, P.; Braive, R.; Le Gratiet, L.; Leroy, L.; Miard, A.; Lemaître, A.; Sagnes, I.
July 2009
Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p041108
Academic Journal
We show that quantum dot intersublevel transitions can be coupled to midinfrared photonic crystal modes. The coupling is observed under optical pumping with S-P intersublevel transitions of InGaAs self-assembled quantum dots resonant around 20 μm wavelength. An enhancement in the intersublevel absorption and a spectral tuning are evidenced when the optical modes of two-dimensional photonic crystals enter in resonance with the photoinduced intersublevel absorption. This effect is illustrated in the case of GaAs two-dimensional photonic crystal membranes with lattice periodicities of 10.5, 9.5, and 8.5 μm containing multilayers of self-assembled quantum dots.


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