Next-generation cellular technologies, commonly referred to as the sixth generation (6G),
are envisioned to support a higher system capacity, better performance, and network …

Microwave photonics, which brings together the worlds of radiofrequency engineering and
optoelectronics, has attracted great interest from both the research community and the …

Ultra-high bandwidth, negligible latency and seamless communication are envisioned as
milestones that will revolutionize the way by which societies create, distribute and consume …

Microwave photonics offers transformative capabilities for ultra-wideband electronic signal
processing and frequency synthesis with record-low phase noise levels. Despite the intrinsic …

A photodetector (PD) converts optical signals into electrical ones and is widely used in
optical interconnect. High‐speed PDs are in high demand as they are necessary to meet …

Since about one and half centuries ago, at the dawn of modern communications, the radio
and the optics have been two separate electromagnetic spectrum regions to carry data …

Device design for unitraveling-carrier photodiodes (UTC-PDs) and their derivative structures
is reconsidered from the point of view of terahertz (THz) applications. A key design …

Terahertz waves, which lie in the frequency range of 0.1-10 THz, have long been
investigated in a few limited fields, such as astronomy, because of a lack of devices for their …

This paper is divided into two major parts. Following a brief introduction that establishes
some definitions and assumptions, Section II updates our earlier study on the limits of the RF …

In the past year, fifth-generation (5G) wireless technology has seen dramatic growth, spurred
on by the continuing demand for faster data communications with lower latency. At the same …