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Optical bistability and hysteresis of hybrid metal-semiconductor nano-dimer | | A. V. Malyshev
; V. A. Malyshev
; | | Date: |
8 Jun 2011 | | Abstract: | Optical response of an artificial composite nano-dimer comprising a
semiconductor quantum dot and a metal nanosphere is analyzed theoretically. We
show that internal degrees of freedom of the system can manifest bistability
and optical hysteresis as functions of the incident field intensity. We argue
that these effects can be observed for the real world systems, such as a CdSe
quantum dot and an Au nanoparticle hybrids. These properties can be revealed by
measuring the optical hysteresis of the Rayleigh scattering. We show also that
the total dipole moment of the system can be switched abruptly between its two
stable states by small changes in the excitation intensity. The latter promises
various applications in the field of all-optical processing at nanoscale, the
most underlying of them being the volatile optical memory. | | Source: | arXiv, 1106.1598 | | Services: | Forum | Review | PDF | Favorites | |
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