Surface-enhanced Raman spectroscopy (SERS) and related spectroscopies are powered
primarily by the concentration of the electromagnetic (EM) fields associated with light in or …

Surface-enhanced Raman spectroscopy (SERS) is a powerful cross-disciplinary analytical
technique allowing ultrasensitive detection of various analytes with a fingerprint-like …

We experimentally demonstrate the optical trap** of a single bovine serum albumin (BSA)
molecule that has a hydrodynamic radius of 3.4 nm, using a double-nanohole in an Au film …

We provide a review of the main aspects related to surface-enhanced Raman scattering
(SERS) enhancement factors (EFs), from their origins to the important issue of their practical …

Metal nanostructures provide extreme focusing of optical energy that is limited
fundamentally by quantum tunneling. We directly probe the onset of the quantum tunneling …

Light manipulation has been widely employed in lighting, display, and energy storage,
becoming an inseparable part of human lives. However, the conventional optical devices …

Single molecule detection by directivity enhanced Raman scattering is demonstrated using
nanoantennas. Bianalyte Raman scattering is used to confirm the detection of single …

Top-down fabrication of electron-beam lithography (EBL)-defined metallic nanostructures is
a successful route to obtain extremely high electromagnetic field enhancement via …

Controlling light from single emitters is an overarching theme of nano-optics. Antennas are
routinely used to modify the angular emission patterns of radio wave sources.“Optical …

We present near-field measurements of optical Yagi-Uda nanoantennas that are used in
receiving mode. The eigenmode imaging of amplitude and phase by apertureless scanning …