Browse > Article
http://dx.doi.org/10.3807/COPP.2017.1.1.060

All-optical Polarization Phase Modulation in Coupled Quantum Dots  

Je, Ku Chul (Department of Opto-mechatronics, Pusan National University)
Kyhm, Kwangseuk (Department of Opto-mechatronics, Pusan National University)
Publication Information
Current Optics and Photonics / v.1, no.1, 2017 , pp. 60-64 More about this Journal
Abstract
We have considered optical nonlinearities of coupled quantum dots theoretically, where an exciton dipole-dipole interaction is mediated between the adjacent large and small quantum dots. For increasing a pump pulse area in resonance with the large quantum dot exciton the induced nonlinear refractive index of the small quantum dot exciton has been obtained. As the exciton dipole-dipole interaction depends on the relative orientation of two exciton dipoles, the optical nonlinearities for the directions parallel and perpendicular to the coupling axis of the two quantum dots are compared. The directional imbalance of optical nonlinearities in coupled quantum dots can be utilized for a polarization phase modulator by controlling a pump pulse area and propagation length.
Keywords
Optical nonlinearities; Exciton; Polarization; Quantum dots;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M. Bayer, P. Hawrylak, K. Hinzer, S. Fafard, M. Korkushinski, Z. R. Wasilewski, O. Stern, and A. Forchel, "Coupling and entangling of quantum states in quantum dot molecules" Science 291, 451 (2001)   DOI
2 W. Sheng and J. Leburton, "Spontaneous localization in InAs/GaAs self-assembled quantum dot molecules" Applied Rev. Lett. 81, 4449 (2002)   DOI
3 G. Bester, J. Shumway, and J. Zunger, "Theory of excitonic spectra and entanglement engineering in dot molecules" Phys. Rev. Lett. 93, 047401 (2004)   DOI
4 X. R. Zhou, J. H. Lee, G. J. Salamo, M. Royo, M. Climente, and M. Doty, "Coulomb interaction signatures in self-assembled lateral quantum dot molecules" Phys. Rev. B 87, 125309 (2013).   DOI
5 M. F. Doty, J. I. Climente, M. Korkushinski, M. Scheibner, A. Bracker, P. Hawrylak, and D. Gammon, "Antibonding ground states in InAs quantum dot molecules" Phys. Rev. Lett. 102, 047401 (2009).   DOI
6 L. Wang, A. Rastelli, S. Kiravittaya, M. Benyoucef, and O. G. Schmidt, "Self-assembled quantum dot molecules" Adv. Mater. 21, 2601 (2009).   DOI
7 T. Unold, K. Mueller, C. Lienau, T. Elsaesser, and A. D. Wieck, "Optical control of excitons in a pair of quantum dots coupled by the dipole-dipole interaction" Phys. Rev. Lett. 94, 137404 (2005).   DOI
8 Victor I. Klimov, Semiconductor and Metal Nanocrystals (Marcel Dekker, Inc., New York-Basel, 2004).
9 H. Htoon, S. A. Crooker, M. Furis, S. Jeong, Al. L. Efros, and V. I. Klimov, "Anomalous circular polarization of photoluminescence spectra of individual CdSe nanocrystals in an applied magnetic field" Phys. Rev. Lett. 102, 017402 (2009).   DOI
10 M. Furis, H. Htoon, M. A. Petruska, V. I. Klimov, T. Barrick, and S. A. Crooker, "Bright-exciton fine structure and anisotropic exchange in CdSe nanocrystal quantum dots" Phys. Rev. B 73, 241313(R) (2006).   DOI
11 H. Htoon, M. Furis, S. A. Crooker, S. Jeong, and V. I. Klimov, "Linearly polarized fine structure of the bright exciton state in individual CdSe nanocrystal quantum dots" Phys. Rev. B 77, 035328 (2008).   DOI
12 D. J. Norris, Al. L. Efros, M. Rosen, M. G. Bawendi, Phys, Rev. B 53, 16347 (1996).   DOI
13 Al. L. Efros, M. Rosen, M. Kuno, M. Nirmal, D. J. Norris, and M. G. Bawendi, "Size dependence of exciton fine structure in CdSe quantum dots" Phys. Rev. B 54, 4843 (1996).   DOI
14 K. C. Je, "Optical excionic absorption spectrum in coupled quantum dots due to dipole-dipole interactions" J. Kor. Phys. Soc. 67, 896 (2015).   DOI
15 K. C Je, I. C. Shin, J. H. Kim, and K. S. Kyhm, "Surfaceplasmon-assisted modal gain enhancement in Au-hybrid CdSe/ZnS nanocrystal quantum dots"Appl. Phys. Lett. 97, 103110 (2010).   DOI
16 H. Haug and S. W. Koch, Quantum theory of the optical and electric properties of semiconductors, 4th Edition (World Scientific, Singapore, 2004)