Fractal energy spectrum of a polariton gas in a Fibonacci quasiperiodic potential

We report on the study of a polariton gas confined in a quasiperiodic one-dimensional cavity, described by a Fibonacci sequence. Imaging the polariton modes both in real and reciprocal space, we observe features characteristic of their fractal energy spectrum such as the opening of minigaps obeying...

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Bibliographic Details
Published in:Physical review letters 2014-04, Vol.112 (14), p.146404-146404, Article 146404
Main Authors: Tanese, D, Gurevich, E, Baboux, F, Jacqmin, T, Lemaître, A, Galopin, E, Sagnes, I, Amo, A, Bloch, J, Akkermans, E
Format: Article
Language:English
Subjects:
Fractal analysis
Fractals
Holes
Optics
Oscillations
Physics
Polaritons
Reciprocal space
Schroedinger equation
Simulation
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Summary:We report on the study of a polariton gas confined in a quasiperiodic one-dimensional cavity, described by a Fibonacci sequence. Imaging the polariton modes both in real and reciprocal space, we observe features characteristic of their fractal energy spectrum such as the opening of minigaps obeying the gap labeling theorem and log-periodic oscillations of the integrated density of states. These observations are accurately reproduced solving an effective 1D Schrödinger equation, illustrating the potential of cavity polaritons as a quantum simulator in complex topological geometries.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.112.146404