Polarization-dependent optomechanics mediated by chiral microresonators.
Chirality is one of the most prominent and intriguing aspects of nature, from spiral galaxies down to aminoacids. Despite the wide range of living and non-living, natural and artificial chiral systems at different scales, the origin of chirality-induced phenomena is often puzzling. Here we assess the onset of chiral optomechanics, exploiting the control of the interaction between chiral entities. We perform an experimental and theoretical investigation of the simultaneous optical trapping and rotation of spherulite-like chiral microparticles. Due to their shell structure (Bragg dielectric resonator), the microparticles function as omnidirectional chiral mirrors yielding highly polarization-dependent optomechanical effects. The coupling of linear and angular momentum, mediated by the optical polarization and the microparticles chiral reflectance, allows for fine tuning of chirality-induced optical forces and torques. This offers tools for optomechanics, optical sorting and sensing and optofluidics.
CNR-IPCF, Istituto per i Processi Chimico-Fisici, 98158 Messina, Italy.
M G
MG
Donato
Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
J
J
Hernandez
CNR-IPCF, UOS Cosenza, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
A
A
Mazzulla
Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
C
C
Provenzano
Dipartimento di Fisica e Scienze della Terra, Università di Messina, 98166 Messina, Italy.
R
R
Saija
1] CNR-IPCF, Istituto per i Processi Chimico-Fisici, 98158 Messina, Italy [2] Dipartimento di Fisica e Scienze della Terra, Università di Messina, 98166 Messina, Italy.
R
R
Sayed
1] CNR-IPCF, Istituto per i Processi Chimico-Fisici, 98158 Messina, Italy [2] Dipartimento di Fisica e Scienze della Terra, Università di Messina, 98166 Messina, Italy.
S
S
Vasi
1] CNR-IPCF, Istituto per i Processi Chimico-Fisici, 98158 Messina, Italy [2] Dipartimento di Fisica e Scienze della Terra, Università di Messina, 98166 Messina, Italy.
A
A
Magazzù
1] Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy [2] CNR-IPCF, UOS Cosenza, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
P
P
Pagliusi
1] Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy [2] CNR-IPCF, UOS Cosenza, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy [3] Centro Interdisciplinare 'B. Segre' dell'Accademia Nazionale dei Lincei, 00165 Roma, Italy.
R
R
Bartolino
CNR-IPCF, Istituto per i Processi Chimico-Fisici, 98158 Messina, Italy.
P G
PG
Gucciardi
CNR-IPCF, Istituto per i Processi Chimico-Fisici, 98158 Messina, Italy.
O M
OM
Maragò
1] Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy [2] CNR-IPCF, UOS Cosenza, Ponte P. Bucci, Cubo 33B, 87036 Rende (CS), Italy.
G
G
Cipparrone