Circular dichroism enhancement in grapheme with planar metal nanostructures: A computational study

Circular Dichroism Enhancement and Biosensing Application of Composite Dielectric Chiral Nanostructures

“…Single-layer planar ACPNs produce planar chirality due to the destruction of the mirror symmetry in the plane. , For example, planar heptameric gold nanostructures break symmetry by rotating the peripheral hexamer to obtain the CD signal . Multi-layer planar ACPNs produce chirality due to the destruction of the spatial symmetry. , For example, the overall unit cell of the conjugated bilayer twisted-semicircle nanostructure exhibits a typical symmetry broken characteristic for light propagation direction with no mirror plane and center of inversion, leading to the strong chirality and multi-band giant CD effect in the THz band . Compared with planar ACPNs, three-dimensional ACPNs show a stronger chiral effect by breaking the symmetry of space. − For example, a planar array of plasmonic ramp-shaped nanostructures with an azimuthal gradient depth breaks the symmetry in the z -direction and exhibits a giant CD at visible frequencies .…”

“…16 Multi-layer planar ACPNs produce chirality due to the destruction of the spatial symmetry. 18,19 For example, the overall unit cell of the conjugated bilayer twistedsemicircle nanostructure exhibits a typical symmetry broken characteristic for light propagation direction with no mirror plane and center of inversion, leading to the strong chirality and multi-band giant CD effect in the THz band. 18 Compared with planar ACPNs, three-dimensional ACPNs show a stronger chiral effect by breaking the symmetry of space.…”

Prospective applications of two-dimensional materials beyond laboratory frontiers: A review

“… 80 For biosensing application, stronger circular dichroism can be attained by enhancing surface plasmonic coupling in planar structured graphene. 81 Che et al. 82 studied the electrical modulating behavior and the capability to switch the absorption behavior of monolayer graphene owing to its optoelectronic applications.…”

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS2 and a Distributed Bragg Reflector

“…The CD signal can be modulated by changing the oblique incident angle. Compared with bilayer chiral nanostructures, multilayer chiral nanostructures can generate stronger CD signals. − For example, the h-type structure of multilayer chiral nanostructures and the nearly perfect extinction chiral metamaterial mirror surface produce a CD signal with an FWHM of 300 nm and an intensity of 0.689 in the visible range . In addition, achiral nanostructures can also generate similar CD signals.…”