SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 35: Focus Session: Transient multi-wave mixing on excitonic resonances
HL 35.5: Talk
Thursday, March 30, 2023, 11:15–11:30, POT 251
Nonlinear all-optical coherent generation and read-out of valleys in atomically thin semiconductors — •Sebastian Klimmer1, Artem Sinelnik1,2, Muhammad Hussain1, Isabelle Staude1,2, Habib Rostami3, and Giancarlo Soavi1 — 1Institute of Solid State Physics, Friedrich Schiller University Jena, Germany — 2Institute of Applied Physics, Friedrich Schiller University Jena, Germany — 3Nordita, KTH Royal Institute of Technology and Stockholm University, Sweden
Over the last few decades, nonlinear optical (NLO) processes have become a pillar for novel photonic devices. In particular, four-wave mixing (FWM) effects can be used to generate quantum optical states of light, such as entangled photons. Transition metal dichalcogenides (TMDs) offer significant advantages compared to conventional nonlinear materials, as their strong light-matter interaction and ease of integration into existing photonic platforms[1] make them perfect for enhancing the performance of integrated NLO devices. In addition, their atomic thickness softens phase matching limits, providing a virtually unlimited bandwidth for FWM[2]. This could be exploited to entangle photons from various spectral regions, making them an ideal source for quantum imaging applications[3]. In this work, we study broadband and exciton enhanced FWM in the telecom spectral range in MoS2, highlighting the capability of TMDs for integrated photonics and communication applications.
[1] He, J. et al., Nano Lett. 21, 7, 2709-2718 (2021)
[2] Trovatello, C. et al., Nat. Photonics. 15, 6-10 (2021)
[3] Gilaberte Basset, M. et al., Laser Photonics Rev. 13, 10 (2019)