As optical counterpart of microwave antennas, optical nano-antennas are important devices for converting propagating radiation into confined/enhanced fields at nanoscale. The recent advances in resonant sub-wavelength optical antennas have now offered researchers a continuum of electromagnetic spectrum—from radio frequencies all the way up to X-rays—to design, analyze and predict new phenomena ...

Whispering-Gallery-Mode (WGM) resonators are emerging as an excellent platform to study optical phenomena resulting from enhanced light-matter interactions due to their superior capability to confined photons. The monolithic fabrication process to achieve ultra-high-Q WGM resonators without the need to align multiple optical components as requested in traditional design of resonators based on p...

The peculiar nature of topological surface states, such as absence of backscattering, weak anti-localization, and quantum anomalous Hall effect, has been demonstrated mainly in bulk and film of topological insulator (TI), using surface sensitive probes and bulk transport probes. However, it is equally important and experimentally challenging to confine massless Dirac fermions with nano-steps on...

Physical characterization of nanoparticles is required for a wide range of applications. Nanomechanical resonators can quantify the mass of individual particles with detection limits down to a single atom in vacuum. However, applications are limited because performance is severely degraded in solution. Suspended micro- and nanochannel resonators have opened up the possibility of achieving vacuu...

An ultrabroad absorber based on double-ring-shaped titanium nitride (TiN) nanoresonators, which can work in high temperatures, is proposed and numerically studied. The with some optimal parameters exhibits an averaged absorption of 94.6% the range 200 - 4000 nm (from ultraviolet to mid-infrared) a band from 3518 having > 90%. We have demonstrated detail physical mechanisms ultra-broad absorptio...

Temperature is one of the most relevant physical quantities that affects almost all processes in nature. However, realization accurate temperature standards using current references, like triple point water, difficult due to requirements on material purity and stability environment. In addition, harsh environments, sensors with electrical readout, platinum resistors, are implement, urging devel...