image: Figure 1. Schematic of imaging under real-frequency and synthesised complex frequency excitation in a superlens. The same object, when imaged through a superlens under different real-frequency ...

Researchers report their insights on the emerging field of complex frequencies excitations, a recently introduced scheme to control light, sound and other wave phenomena beyond conventional limits.

A collaborative research team led by Interim Head of Physics Professor Shuang Zhang from The University of Hong Kong (HKU), along with National Center for Nanoscience and Technology, Imperial College ...

(a-b) Direct detection of multiple vibration modes. (c-d) The detection of silk protein molecular layer based on graphene-based SEIRA sensor; (e-f) The detection of BSA protein solution based on ...

Complex digital modulation on RF signals is not simple to understand, generate, or analyze. DSP-intensive OFDM (orthogonal frequency-division multiplexing) is part of several communication ...