We employed the contact forces induced by a near-field tip to tune and probe the optical resonances of a mechanically compliant photonic crystal molecule. Here, the pressure induced by the near-field tip is exploited to control the spectral proprieties of the coupled cavities in an ultrawide spectral range, demonstrating a reversible mode shift of 37.5 nm. Besides, by monitoring the coupling strength variation due to the vertical nanodeformation of the dielectric structure, distinct tip-sample interaction regimes have been unambiguously reconstructed with a nano-Newton sensitivity. These results demonstrate an optical method for mapping mechanical forces at the nanoscale with a lateral spatial resolution below 100 nm.

Nanoscale mechanical actuation and near-field read-out of photonic crystal molecules / Petruzzella, M.; La China, F.; Intonti, F.; Caselli, N.; De Pas, M.; Van Otten, F.W.M.; Gurioli, M.; Fiore, A.. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - STAMPA. - 94:(2016), pp. 115413-1-115413-6. [10.1103/PhysRevB.94.115413]

Nanoscale mechanical actuation and near-field read-out of photonic crystal molecules

LA CHINA, FEDERICO;INTONTI, FRANCESCA;CASELLI, NICCOLO';DE PAS, MARCO;GURIOLI, MASSIMO;
2016

Abstract

We employed the contact forces induced by a near-field tip to tune and probe the optical resonances of a mechanically compliant photonic crystal molecule. Here, the pressure induced by the near-field tip is exploited to control the spectral proprieties of the coupled cavities in an ultrawide spectral range, demonstrating a reversible mode shift of 37.5 nm. Besides, by monitoring the coupling strength variation due to the vertical nanodeformation of the dielectric structure, distinct tip-sample interaction regimes have been unambiguously reconstructed with a nano-Newton sensitivity. These results demonstrate an optical method for mapping mechanical forces at the nanoscale with a lateral spatial resolution below 100 nm.
2016
94
115413-1
115413-6
Petruzzella, M.; La China, F.; Intonti, F.; Caselli, N.; De Pas, M.; Van Otten, F.W.M.; Gurioli, M.; Fiore, A.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1081938
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