75 citations · 399 across the 16 of their papers we have counts for
9 papers · 1 filter
Harmonic to anharmonic tuning of moiré potential leading to unconventional Stark effect and giant dipolar repulsion in WS/WSe heterobilayer
Suman Chatterjee, Medha Dandu, Pushkar Dasika +6
Excitonic states trapped in harmonic moiré wells of twisted heterobilayers is an intriguing testbed. However, the moiré potential is primarily governed by the twist angle, and its…
Highly nonlinear biexcitonic photocurrent from ultrafast inter-layer charge transfer
Sarthak Das, Garima Gupta, Suman Chatterjee +3
Strong Coulomb interaction in monolayer semiconductors allows them to host optically active large many-body states, such as the five-particle state, charged biexciton. Strong nonli…
Trion-trion annihilation in monolayer WS
Suman Chatterjee, Garima Gupta, Sarthak Das +3
Strong Coulomb interaction in monolayer transition metal dichalcogenides can facilitate nontrivial many-body effects among excitonic complexes. Many-body effects like exciton-excit…
Probing biexciton in monolayer WS through controlled many-body interaction
Suman Chatterjee, Sarthak Das, Garima Gupta +3
The monolayers of semiconducting transition metal dichalcogenides host strongly bound excitonic complexes and are an excellent platform for exploring many-body physics. Here we dem…
Highly tunable layered exciton in bilayer WS: linear quantum confined Stark effect versus electrostatic doping
Sarthak Das, Medha Dandu, Garima Gupta +6
In 1H monolayer transition metal dichalcogenide, the inversion symmetry is broken, while the reflection symmetry is maintained. On the contrary, in the bilayer, the inversion symme…
Anharmonicity in Raman-active phonon modes in atomically thin MoS
Suman Sarkar, Indrajit Maity, H. L. Pradeepa +10
Phonon-phonon anharmonic effects have a strong influence on the phonon spectrum; most prominent manifestation of these effects are the softening (shift in frequency) and broadening…
Strong Single- and Two-Photon Luminescence Enhancement by Nonradiative Energy Transfer across Layered Heterostructure
Medha Dandu, Rabindra Biswas, Sarthak Das +5
The strong light-matter interaction in monolayer transition metal dichalcogenides (TMDs) is promising for nanoscale optoelectronics with their direct band gap nature and the ultra-…
Layer degree of freedom for excitons in transition metal dichalcogenides
Sarthak Das, Garima Gupta, Kausik Majumdar
Layered transition metal dichalcogenides (TMDCs) host a variety of strongly bound exciton complexes that control the optical properties in these materials. Apart from spin and vall…
Inter-layer charge transport controlled by exciton-trion coherent coupling
Sangeeth Kallatt, Sarthak Das, Suman Chatterjee +1
The possibility of electrical manipulation and detection of charged exciton (trion) before its radiative recombination makes it promising for excitonic devices. Using a few-layer g…