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

Anno: 2017

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

Affiliazione autori: 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.


Volume: 19 (4)      Da Pagina: 043902-1  A: 043902-6

DOI: 10.1103/PhysRevLett.119.043902

Citazioni: 14
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2022-06-19
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