Compact terahertz radiation source using a bimodal laser and plasmonic photomixer

Abstract

Combining a plasmonic photomixer with a novel two-section digital distributed feedback laser diode enables generation of high-power, wavelength-tunable terahertz radiation at room temperature.

Review of terahertz photoconductive antenna technology

“…In addition to THz PCAs with gap-located nanostructures, several works have investigated nanostructuring of the antenna electrodes directly. 66,71,72,76,140,[163][164][165][166] The key distinction here is that, in this configuration, the nanostructured regions are electrically continuous with either the anode or cathode, rather than being electrically isolated. An example of this from the work of Moon et al 167 is shown in Fig.…”

“…164 This concept was expanded on in several works. 71,72,76,140,166 Utilizing a 3 × 3 array of log-periodic dipoles with nanograting electrodes, high average output THz power of 1.9 mW was demonstrated under a 320-mW optical pump power. These antennas, fabricated on LT-GaAs, required a microlens array for individual focusing of the incident optical pump onto the active area of each device.…”