Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 38: 2D materials: Chalcogenides II (joint session HL/DS)

HL 38.3: Talk

Thursday, March 15, 2018, 10:00–10:15, A 151

Optical properties of TMDC semiconductors in the 1,55µm telecom wavelength range — •Michael Lorke and Frank Jahnke — Institute für theoretische Physik, Universität Bremen

In the context of the current interest in atomically thin semiconductors, we study optical properties of highly excited and/or highly doped transition-metal dichalcogenides (TMDCs). We show that under such excitation conditions, transitions between the first and higher conduction bands are possible. These transitions are analogous to inter-subband transitions in conventional quantum well devices. In this work we discuss the carrier density and temperature dependence of such transitions and show that they can be tuned into the technologically relevant 1,55µm telecom wavelength range. This opens the possibility to utilize TMDCs in novel devices ranging from quantum cascade lasers to novel infra-red photodetectors.