Optical properties of atomically thin transition metal dichalcogenides: observations and puzzles

M Koperski, MR Molas, A Arora, K Nogajewski… - …, 2017 - degruyter.com
Recent results on the optical properties of monolayer and few layers of semiconducting
transition metal dichalcogenides are reviewed. Experimental observations are presented …

[HTML][HTML] Magneto-optics of layered two-dimensional semiconductors and heterostructures: progress and prospects

A Arora - Journal of Applied Physics, 2021 - pubs.aip.org
Beginning with the “conventional” two-dimensional (2D) quantum wells based on III–V and II–
VI semiconductors in the 1970s, to the recent atomically thin sheets of van der Waals …

Indirect-to-Direct Band Gap Crossover in Few-Layer MoTe2

IG Lezama, A Arora, A Ubaldini, C Barreteau… - Nano …, 2015 - ACS Publications
We study the evolution of the band gap structure in few-layer MoTe2 crystals, by means of
low-temperature microreflectance (MR) and temperature-dependent photoluminescence …

Trion fine structure and coupled spin–valley dynamics in monolayer tungsten disulfide

G Plechinger, P Nagler, A Arora, R Schmidt… - Nature …, 2016 - nature.com
Monolayer transition-metal dichalcogenides have recently emerged as possible candidates
for valleytronic applications, as the spin and valley pseudospin are directly coupled and …

Excitonic resonances in thin films of WSe 2: from monolayer to bulk material

A Arora, M Koperski, K Nogajewski, J Marcus… - Nanoscale, 2015 - pubs.rsc.org
We present optical spectroscopy (photoluminescence and reflectance) studies of thin layers
of the transition metal dichalcogenide WSe2, with thickness ranging from mono-to tetra-layer …

Exciton band structure in layered MoSe 2: from a monolayer to the bulk limit

A Arora, K Nogajewski, M Molas, M Koperski… - Nanoscale, 2015 - pubs.rsc.org
We present the micro-photoluminescence (μPL) and micro-reflectance contrast (μRC)
spectroscopy studies on thin films of MoSe2 with layer thicknesses ranging from a …

Spin-polarized electrons in monolayer MoS2

JG Roch, G Froehlicher, N Leisgang, P Makk… - Nature …, 2019 - nature.com
Coulomb interactions are crucial in determining the ground state of an ideal two-
dimensional electron gas (2DEG) in the limit of low electron densities. In this regime …

Valley Zeeman Splitting and Valley Polarization of Neutral and Charged Excitons in Monolayer MoTe2 at High Magnetic Fields

A Arora, R Schmidt, R Schneider, MR Molas… - Nano …, 2016 - ACS Publications
Semiconducting transition metal dichalcogenides (TMDCs) give rise to interesting new
phenomena in external magnetic fields, such as valley Zeeman splitting and magnetic-field …

Giant Faraday rotation in atomically thin semiconductors

B Carey, NK Wessling, P Steeger, R Schmidt… - Nature …, 2024 - nature.com
Faraday rotation is a fundamental effect in the magneto-optical response of solids, liquids
and gases. Materials with a large Verdet constant find applications in optical modulators …

Magneto-optical Kerr effect spectroscopy study of : Evidence for an interlayer -like exciton

D Das, D Jana, T Deilmann, S Ghosh - Physical Review B, 2024 - APS
Magneto-optical Kerr effect spectroscopy has been used to measure the Land e ́ g-factor of
excitons in bulk 2 H-MoS 2. For the ground state A 1 s exciton, the adjacent interlayer ILA …