Tailoring Correlations of the Local Density of States in Disordered Photonic Materials

Year: 2017

Authors: Riboli F., Uccheddu F., Monaco G., Caselli N., Intonti F., Gurioli M-, Skipetrov SE.

Autors Affiliation: Univ Trento, Dept Phys, Via Sommarive 14, I-38050 Povo, TN, Italy; CNR, Ist Nazl Ott, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy; European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; Univ Florence, Dept Ind Engn, Via Santa Marta 5, I-50139 Florence, Italy; Univ Florence, Dept Phys, Via G Sansone 1, I-50019 Sesto Fiorentino, FI, Italy; CSIC, Inst Ciencia Mat Madrid, Calle Sor Juana Ins Cruz 3, Madrid, Spain; Univ Grenoble Alpes, LPMMC, F-38000 Grenoble, France; CNRS, LPMMC, F-38000 Grenoble, France

Abstract: We present experimental evidence for the different mechanisms driving the fluctuations of the local density of states (LDOS) in disordered photonic systems. We establish a clear link between the microscopic structure of the material and the frequency correlation function of LDOS accessed by a near-field hyperspectral imaging technique. We show, in particular, that short- and long-range frequency correlations of LDOS are controlled by different physical processes (multiple or single scattering processes, respectively) that can be-to some extent-manipulated independently. We also demonstrate that the single scattering contribution to LDOS fluctuations is sensitive to subwavelength features of the material and, in particular, to the correlation length of its dielectric function. Our work paves a way towards complete control of statistical properties of disordered photonic systems, allowing for designing materials with predefined correlations of LDOS.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 19 (4)      Pages from: 043902-1  to: 043902-6

KeyWords: MEDIA; SCATTERING; DIFFUSION; ABSENCE; MODES; LIGHT
DOI: 10.1103/PhysRevLett.119.043902

Citations: 16
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