scholarly journals Molecular Polaritons Generated from Strong Coupling between CdSe Nanoplatelets and a Dielectric Optical Cavity

2021 ◽  
Author(s):  
Liangyu Qiu ◽  
Arkajit Mandal ◽  
Ovishek Morshed ◽  
Mahilet T. Meidenbauer ◽  
William Girten ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Hybrid System ◽  
Optical Cavity ◽  
Bragg Reflector ◽  
Strong Coupling Regime ◽  
Classical Dynamics ◽  
Distributed Bragg Reflector ◽  
Dynamics Simulations ◽  
Adiabatic Transitions ◽  
Physical And Chemical

We demonstrate the formation of CdSe nanoplatelet (NPL) exciton-polaritons in a distributed bragg reflector (DBR) cavity. The molecule-cavity hybrid system is in the strong coupling regime with an 83 meV Rabi splitting, characterized from angle-resolved reflectance and photoluminescence measurements. Mixed quantum-classical dynamics simulations are used to investigate the polariton photo-physics of the hybrid system by treating the electronic and photonic degree of freedom (DOF) quantum mechanically, and the nuclear phononic DOF classically. Our numerical simulations of the angle-resolved photoluminescence (PL) agree excellently with the experimental data, providing a fundamental explanation of the asymmetric intensity distribution of the upper and lower polariton branches. Our results also provide mechanistic insights into the importance of phonon-assisted non-adiabatic transitions among polariton states which are reflected in the various features of the PL spectra. Our work proves the feasibility of coupling nanoplatelets into a dielectric cavity to form a hybrid system and provides a new platform for investigating cavity-mediated physical and chemical processes.

Molecular Polaritons Generated from Strong Coupling between CdSe Nanoplatelets and a Dielectric Optical Cavity

2021 ◽  
Author(s):  
Liangyu Qiu ◽  
Arkajit Mandal ◽  
Ovishek Morshed ◽  
Mahilet T. Meidenbauer ◽  
William Girten ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Hybrid System ◽  
Optical Cavity ◽  
Bragg Reflector ◽  
Strong Coupling Regime ◽  
Classical Dynamics ◽  
Distributed Bragg Reflector ◽  
Dynamics Simulations ◽  
Adiabatic Transitions ◽  
Physical And Chemical

We demonstrate the formation of CdSe nanoplatelet (NPL) exciton-polaritons in a distributed bragg reflector (DBR) cavity. The molecule-cavity hybrid system is in the strong coupling regime with an 83 meV Rabi splitting, characterized from angle-resolved reflectance and photoluminescence measurements. Mixed quantum-classical dynamics simulations are used to investigate the polariton photo-physics of the hybrid system by treating the electronic and photonic degree of freedom (DOF) quantum mechanically, and the nuclear phononic DOF classically. Our numerical simulations of the angle-resolved photoluminescence (PL) agree excellently with the experimental data, providing a fundamental explanation of the asymmetric intensity distribution of the upper and lower polariton branches. Our results also provide mechanistic insights into the importance of phonon-assisted non-adiabatic transitions among polariton states which are reflected in the various features of the PL spectra. Our work proves the feasibility of coupling nanoplatelets into a dielectric cavity to form a hybrid system and provides a new platform for investigating cavity-mediated physical and chemical processes.

scholarly journals Molecular Polaritons Generated from Strong Coupling between CdSe Nanoplatelets and a Dielectric Optical Cavity

2021 ◽  
Author(s):  
Liangyu Qiu ◽  
Arkajit Mandal ◽  
Ovishek Morshed ◽  
Mahilet T. Meidenbauer ◽  
William Girten ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Hybrid System ◽  
Degrees Of Freedom ◽  
Optical Cavity ◽  
Bragg Reflector ◽  
Strong Coupling Regime ◽  
Classical Dynamics ◽  
Distributed Bragg Reflector ◽  
Dynamics Simulations ◽  
Photon States

We demonstrate the formation of CdSe nanoplatelet (NPL) exciton-polaritons in a distributed bragg reflector (DBR) cavity. The molecule-cavity hybrid system is in the strong coupling regime with an 83 meV Rabi splitting, characterized from angle-resolved reflectance and photoluminescence measurements. Mixed quantum-classical dynamics simulations are used to investigate the polariton photophysics of the hybrid system by treating the electronic and photonic degrees of freedom (DOF) quantum mechanically, and the nuclear phononic DOF classically. Our numerical simulations of the angle-resolved photoluminescence (PL) agree extremely well with the experimental data, providing a fundamental explanation of the asymmetric intensity distribution of the upper and lower polariton branches. Our results also provide mechanistic insights into the importance of phonon-assisted non-adiabatic transitions among polariton states which are reflected in the various features of the PL spectra. This work proves the feasibility of coupling nanoplatelet electronic states with the photon states of a dielectric cavity to form a hybrid system and provides a new platform for investigating cavity-mediated physical and chemical processes.

scholarly journals III-Nitrides Resonant Cavity Photodetector Devices

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4428
Author(s):  
Susana Fernández ◽  
Fernando B. Naranjo ◽  
Miguel Ángel Sánchez-García ◽  
Enrique Calleja
Keyword(s):  
Spectral Response ◽  
Optical Cavity ◽  
Resonant Cavity ◽  
Schottky Contact ◽  
Bragg Reflector ◽  
Planar Geometry ◽  
Distributed Bragg Reflector ◽  
Frequency Plasma ◽  
Wavelength Selectivity ◽  
Conventional Device

III-nitride resonant cavity-enhanced Schottky barrier photodetectors were fabricated on 2 µm thick GaN templates by radio frequency plasma-assisted molecular beam epitaxy. The optical cavity was formed by a bottom distributed Bragg reflector based on 10 periods of Al0.3Ga0.7N/GaN, an Au-based Schottky contact as top mirror, and an active zone of 40 nm-thick GaN layer. The devices were fabricated with planar geometry. To evaluate the main benefits allowed by the optical cavity, conventional Schottky photodetectors were also processed. The results revealed a planar spectral response for the conventional photodetector, unlike the resonant devices that showed two raised peaks at 330 and 358 nm with responsivities of 0.34 and 0.39 mA/W, respectively. Both values were 80 times higher than the planar response of the conventional device. These results demonstrate the strong effect of the optical cavity to achieve the desired wavelength selectivity and to enhance the optical field thanks to the light resonance into the optical cavity. The research of such a combination of nitride-based Bragg mirror and thin active layer is the kernel of the present paper.

scholarly journals Strong optomechanical coupling at room temperature by coherent scattering

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Andrés de los Ríos Sommer ◽  
Nadine Meyer ◽  
Romain Quidant
Keyword(s):  
Strong Coupling ◽  
Coupling Strength ◽  
Room Temperature ◽  
Quantum Control ◽  
Optical Cavity ◽  
Coherent Scattering ◽  
Strong Coupling Regime ◽  
Cavity Decay ◽  
Decoherence Rate ◽  
Optomechanical Coupling

AbstractQuantum control of a system requires the manipulation of quantum states faster than any decoherence rate. For mesoscopic systems, this has so far only been reached by few cryogenic systems. An important milestone towards quantum control is the so-called strong coupling regime, which in cavity optomechanics corresponds to an optomechanical coupling strength larger than cavity decay rate and mechanical damping. Here, we demonstrate the strong coupling regime at room temperature between a levitated silica particle and a high finesse optical cavity. Normal mode splitting is achieved by employing coherent scattering, instead of directly driving the cavity. The coupling strength achieved here approaches three times the cavity linewidth, crossing deep into the strong coupling regime. Entering the strong coupling regime is an essential step towards quantum control with mesoscopic objects at room temperature.

Advances in the Realisation of GaN-Based Microcavities: Towards Strong Coupling at Room Temperature

2003 ◽  
Vol 798 ◽  
Author(s):  
F. Semond ◽  
D. Byrne ◽  
F. Natali ◽  
M. Leroux ◽  
J. Massies ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Strong Coupling ◽  
Silicon Substrate ◽  
Room Temperature ◽  
Molecular Beam ◽  
Optical Cavity ◽  
Strong Coupling Regime ◽  
Rabi Splitting ◽  
Dielectric Mirror ◽  
High Finesse

ABSTRACTIn a recent paper [Phys. Rev. B 68, 153313 (2003)], we reported the first experimental observation of the strong coupling regime in a GaN-based microcavity. The λ/2 GaN optical cavity was grown by molecular beam epitaxy on a Si(111) substrate. The upper mirror is a SiO2/Si3N4 dielectric mirror and the silicon substrate acts as the bottom mirror. With such a relatively simple and low-finesse microcavity, a Rabi splitting of 31 meV was measured at 5K. On the basis of this very encouraging result, approaches to fabricate high-finesse GaN-based cavities exhibiting strong coupling with stable polaritons at room temperature are discussed.

scholarly journals Superconducting resonator and Rydberg atom hybrid system in the strong coupling regime

2016 ◽  
Vol 94 (6) ◽  
Author(s):  
Deshui Yu ◽  
Alessandro Landra ◽  
María Martínez Valado ◽  
Christoph Hufnagel ◽  
Leong Chuan Kwek ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Hybrid System ◽  
Rydberg Atom ◽  
Strong Coupling Regime ◽  
Superconducting Resonator

Strong Coupling: Polariton Bose Condensation

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Strong Coupling ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Dissipative System ◽  
Bose Condensation ◽  
Einstein Condensation ◽  
Strong Coupling Regime ◽  
Stimulated Scattering ◽  
Exciton Polaritons ◽  
Bose Einstein

In this Chapter we address the physics of Bose-Einstein condensation and its implications to a driven-dissipative system such as the polariton laser. We discuss the dynamics of exciton-polaritons non-resonantly pumped within a microcavity in the strong coupling regime. It is shown how the stimulated scattering of exciton-polaritons leads to formation of bosonic condensates that may be stable at elevated temperatures, including room temperature.

Strong coupling: resonant effects

2017 ◽  
Author(s):  
Alexey V. Kavokin ◽  
Jeremy J. Baumberg ◽  
Guillaume Malpuech ◽  
Fabrice P. Laussy
Keyword(s):  
Strong Coupling ◽  
Experimental Studies ◽  
Strong Coupling Regime ◽  
Theoretical Studies ◽  
Stimulated Scattering ◽  
Quantum Theories ◽  
Pump Probe ◽  
Exciton Polaritons ◽  
Linear Optical Properties ◽  
Experimental And Theoretical Studies

This chapter presents experimental studies performed on planar semiconductor microcavities in the strong-coupling regime. The first section reviews linear experiments performed in the 1990s that evidence the linear optical properties of cavity exciton-polaritons. The chapter is then focused on experimental and theoretical studies of resonantly excited microcavity emission. We mainly describe experimental configuations in which stimulated scattering was observed due to formation of a dynamical condensate of polaritons. Pump-probe and cw experiments are described in addition. Dressing of the polariton dispersion and bistability of the polariton system due to inter-condensate interactions are discussed. The semiclassical and the quantum theories of these effects are presented and their results analysed. The potential for realization of devices is also discussed.

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