Circular dichroism (CD), yielding a different response upon illumination with light having opposite spin angular momentum, is opening the way for many new applications from telecommunications to sensing [1]. Although this phenomenon is extremely weak in natural materials, metasurfaces (MS) considerably enhance CD [2]. In comparison to the linear regime, CD in the nonlinear regime (NLCD), e.g. higher harmonic-generation for one circular light polarization with respect to the opposite one, may exhibit much higher contrast. To date, NLCD demonstrations are still limited to plasmonic structures [3] ; however nonlinear MS based on dielectric materials have the potential to yield high NLCD with superior conversion efficiencies than their plasmonic counterpart.

All-dielectric metasurface with enhanced third-harmonic dichroism driven by quasi-BIC

Gandolfi M.;Tognazzi A.;Rocco D.;Carletti L.;De Angelis C.
2021-01-01

Abstract

Circular dichroism (CD), yielding a different response upon illumination with light having opposite spin angular momentum, is opening the way for many new applications from telecommunications to sensing [1]. Although this phenomenon is extremely weak in natural materials, metasurfaces (MS) considerably enhance CD [2]. In comparison to the linear regime, CD in the nonlinear regime (NLCD), e.g. higher harmonic-generation for one circular light polarization with respect to the opposite one, may exhibit much higher contrast. To date, NLCD demonstrations are still limited to plasmonic structures [3] ; however nonlinear MS based on dielectric materials have the potential to yield high NLCD with superior conversion efficiencies than their plasmonic counterpart.
2021
978-1-6654-1876-8
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/549399
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact