Sequential multiphoton strategy for semiconductor-based terahertz detectors

Terahertz detection schemes based on sequential multiphoton absorption

Semiconductor terahertz detectors and absorption enhancement using plasmons

As novel applications using terahertz radiation are developed, there is an increased demand for sensitive terahertz detectors. This has led to new approaches for enhancing the response of terahertz detectors. Results were recently reported on the terahertz response of a p-type AlGaAs/GaAs, n-type GaAs/AlGaAs, n-type GaN/AlGaN, and p-type GaSb/GaSb Interfacial Workfunction Internal Photoemission...

All-electric detection of the polarization state of terahertz laser radiation

Two types of room-temperature detectors of terahertz laser radiation have been developed which allow, in an all-electric manner, the determination of the plane of polarization of linearly polarized radiation and the Stokes parameters of elliptically polarized radiation, respectively. The operation of the detectors is based on photogalvanic effects in semiconductor quantum well structures of low...

Design of a Lock-in Amplifier For Terahertz Detector And Imager Arrays on Monolithic CMOS

This work describes the design and integration of a lock-in amplifier with a terahertz detector array. Research in the terahertz region, which lies between the microwave and infrared portion of the electromagnetic spectrum, has been on the rise due to its potential applications as a biologically-safe replacement for X-Ray imaging and other non-invasive applications such as spectroscopy. Cryogen...

Transport in semiconductor superlattices: from quantum kinetics to terahertz-photon detectors

Semiconductor superlattices are interesting for two distinct reasons: the possibility to design their structure (band-width(s), doping, etc.) gives access to a large parameter space where different physical phenomena can be explored. Secondly, many important device applications have been proposed, and then subsequently successfully fabricated. A number of theoretical approaches has been used to...