Nonradiating sources of energy have traditionally been studied in quantum mechanics and
astrophysics but have received very little attention in the photonics community. This situation …

This work reviews fundamentals and the recent state-of-art achievements in the field of
plasmonic biosensing based terahertz (THz) spectroscopy. Being nonpoisonous and …

In undergraduate courses on classical electromagnetism, it is taught that a perfect conductor
expels the electromagnetic (EM) field, and hence its surface is not able to support the …

The toroidal dipole is a localized electromagnetic excitation, distinct from the magnetic and
electric dipoles. While the electric dipole can be understood as a pair of opposite charges …

Toroidal multipole moments are usually underestimated as they are quite weak in most
cases of light-matter interaction. Herein, we reveal a strong link between the toroidal dipole …

Photoacoustic imaging (PAI) and imaging‐guided photothermal therapy (PTT) in the second
near‐infrared window (NIR‐II, 1000–1700 nm) have received increasing attention owing to …

Perfect lenses, superlenses and time-reversal mirrors can support and spatially separate
evanescent waves, which is the basis for detecting subwavelength information in the far …

Advances in metamaterials have offered the opportunity of engineering electromagnetic
properties beyond the limits of natural materials. A typical example is “spoof” surface …

Engineered terahertz (THz) plasmonic metamaterials have emerged as promising platforms
for quick infection diagnosis, cost-effective and real-time pharmacology applications owing …

A single-layered leaky wave antenna (SL-LWA) exploiting the groundless spoof plasmons
(SPs) structure is presented and validated to achieve consistent scanning beam and …