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We present a terahertz quantum cascade laser based on InGaAs/InAlAs/InP material system with double metal waveguide that reaches operating temperature of 123 K with continuous wave power output 4.5 mW at 10 K and slope efficiency comparable to GaAs/AlGaAs counterparts.
A technology for the implementation of electrically tunable optical elements is presented. We illustrate, on the example of a transmission grating (TG), that dielectric elastomer actuators can be used to continuously adjust the properties of diffractive optical elements. The demonstrated TG operates with high transmission, low optical distortion (<lambda/20), high damage threshold (>93 kW/cm...
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