A tunable nanosource of continuous wave terahertz (THz) radiation based on difference frequency generation is proposed and investigated. In this work, we extend and optimize surface plasmon-polariton waveguides to confine light to nanoscales. This new structure offers many advantages to produce more efficient THz waves with lower loss. The presented calculations for 0.6 THz indicate that THz efficiency is about three times larger (12×10 −4 W −1 from a 1-cm long device) with lower loss. Indeed, air gap distance variations to find the phase matching condition do not affect overlap factor.
A novel, low loss and tunable source of continuous terahertz (THz) wave radiation based on frequency conversion in GaAs is presented. The tunability of the device can be achieved by varying the distance between quartz slabs (air gap distance). The output THz power at 1.3 THz for different air gap distances and various waveguide widths has been calculated. By tuning the air gap distance in the range of 290 to 320 nm for a device with 4 cm long at 1.3 THz, a relatively high output power of 3 to 9.5 µW is predicted.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.