Principles of THz Direct Detection, Chapter 5 in "Semiconductor THz Technology, Devices and Systems at RoomTemperature Operation
Abstract
This chapter is a comprehensive review of the physical principles and engineering techniques associated with room-temperature THz direct detectors. It starts with the basic detection mechanisms,both rectifying and thermal. It then addresses the noise mechanisms using both classical and quantum principles, and the THz coupling using impedance-matching and antenna-feed considerations. Fundamental analyses are provided of the noise mechanisms because of lacking coverage in the popular literature. All THz detectors can then be described with a common performance formalism based on two metrics: noise-equivalent power (NEP) and noise-equivalent temperature difference (NETD). A summary is then provided of the typical, and best, detector performance reported to date, including the various CMOS-based detectors. The chapter concludes with a comparison of the bestTHz detector results at room temperature, and demonstrates that none of the existing detector typesare operating anywhere near fundamental theoretical limits, so there is room for significant performance advances.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 16, 2015
- Accession Number
- AD1056826
Entities
People
- D. Segovia-vargas
- E. R. Brown
Organizations
- Wright State University