Anna_Lyamkina_profile

Technical University of Munich

numares AG

LinkedIn

A research is a long and exciting journey from amusing observations to a solid scientific hypothesis and then new technologies that change the world. Integrated quantum photonics has lots of beautiful physics to uncover, but will also provide a platform for new compact devices, and I am thrilled to contribute there.

Description

Research focus: quantum optics, integrated photonics

My research project in MCQST aims to develop a novel platform for brightening spin-forbidden dark exciton states in TMD monolayers based on ultra-low loss GaP dielectric antennas. Coupling dark states to nanoantennas will enhance their optical detection and, thus, provide new insights in exciton physics in TMDs. We will focus on cavity quantum electrodynamics of hybrid systems and address many-body interactions for excitons that are enabled by long life times associated with dark states.


Current position

Data analyst & Algorithm Developer at numares AG

Publications

Tuning the Optical Properties of a MoSe2 Monolayer Using Nanoscale Plasmonic Antennas

M. M. Petric, M. Kremser, M. Barbone, A. Nolinder, A. Lyamkina, A. V. Stier, M. Kaniber, K. Müller, J. J. Finley

Nano Letters 22 (2), 561-569 (2022).

Show Abstract

Nanoplasmonic systems combined with optically active two-dimensional materials provide intriguing opportunities to explore and control light-matter interactions at extreme subwavelength length scales approaching the exciton Bohr radius. Here, we present room- and cryogenic-temperature investigations of a MoSe2 monolayer on individual gold dipole nanoantennas. By controlling nanoantenna size, the dipolar resonance is tuned relative to the exciton achieving a total tuning of similar to 130 meV. Differential reflectance measurements performed on >100 structures reveal an apparent avoided crossing between exciton and dipolar mode and an exciton-plasmon coupling constant of g = 55 meV, representing g/(h omega(X)) >= 3% of the transition energy. This places our hybrid system in the intermediate-coupling regime where spectra exhibit a characteristic Fano-like shape. We demonstrate active control by varying the polarization of the excitation light to programmably suppress coupling to the dipole mode. We further study the emerging optical signatures of the monolayer localized at dipole nanoantennas at 10 K.

DOI: 10.1021/acs.nanolett.1c02676

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