Abstract
The influence of the surrounding cavity on the efficiency of different types of polaritonic emitters of THz radiation has been analysed. It is demonstrated that THz lasing threshold in realistic structures cannot be achieved without a THz cavity, due to destruction of polaritons via excitonic Mott transition. Even modest values of cavity quality factor (not exceeding 50) provide significant quantum efficiency.
Highlights
The influence of the surrounding cavity on the efficiency of different types of polaritonic emitters of THz radiation has been analysed
This paper is aimed to compare the efficiency of the THz emission of polaritonic THz devices operating in the regime of single bosonic stimulation when stimulation is provided by formation of only polaritonic condensate, and in the regime of double bosonic stimulation when the populations of both polariton condensate and the THz mode are above the threshold
Confinement of the THz photons in the cavity leads to increasing photon lifetime t, which become proportional to the cavity quality factor Q: t 5 t0Q, where t0 is the lifetime of THz photons without the THz cavity
Summary
The influence of the surrounding cavity on the efficiency of different types of polaritonic emitters of THz radiation has been analysed. Polaritonic emitters of THz radiation have been proposed where the THz radiative transition occurs into a polariton condensate state and experiences bosonic stimulation[8]. The occupancy numbers of the electronic states does not exceed unity In this case, lasing threshold is achieved when the population of the optical photonic (bosonic) mode reaches a threshold value[16]. In polaritonic THz devices, the radiative THz transition can be stimulated via two different mechanisms: either when (i) the population of a polaritonic condensate state or (ii) a THz mode reaches threshold value. This paper is aimed to compare the efficiency of the THz emission of polaritonic THz devices operating in the regime of single bosonic stimulation when stimulation is provided by formation of only polaritonic condensate, and in the regime of double bosonic stimulation when the populations of both polariton condensate and the THz mode are above the threshold
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