Signatures of quantum exciton transport in two-dimensional coherent optical signals of photosynthetic complexes

2010 ◽  
Author(s):  
Darius Abramavicius ◽  
Shaul Mukamel
Keyword(s):  
Two Dimensional ◽  
Optical Signals ◽  
Exciton Transport ◽  
Photosynthetic Complexes

scholarly journals Efficient Interlayer Exciton Transport in Two-Dimensional Metal-Halide Perovskites.

2020 ◽  
Author(s):  
Alvaro J Magdaleno ◽  
Michael Seitz ◽  
Michel Frising ◽  
Ana Herranz de la Cruz ◽  
Antonio I. Fernández-Domínguez ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Carrier ◽  
Carrier Transport ◽  
Energy Transport ◽  
Diffusion Length ◽  
Charge Carrier Transport ◽  
Two Dimensional ◽  
Exciton Transport ◽  
Halide Perovskites ◽  
Excitonic Energy

We present transient microscopy measurements of interlayer energy transport in (PEA)<sub>2</sub>PbI<sub>4</sub> perovskite. We find efficient interlayer exciton transport (0.06 cm<sup>2</sup>/s), which translates into a diffusion length that exceeds 100 nm and a sub-ps timescale for energy transfer. While still slower than in-plane exciton transport (0.2 cm<sup>2</sup>/s), our results show that excitonic energy transport is considerably less anisotropic than charge-carrier transport for 2D perovskites.

scholarly journals Efficient Interlayer Exciton Transport in Two-Dimensional Metal-Halide Perovskites.

2020 ◽  
Author(s):  
Alvaro J Magdaleno ◽  
Michael Seitz ◽  
Michel Frising ◽  
Ana Herranz de la Cruz ◽  
Antonio I. Fernández-Domínguez ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Carrier ◽  
Carrier Transport ◽  
Energy Transport ◽  
Diffusion Length ◽  
Charge Carrier Transport ◽  
Two Dimensional ◽  
Exciton Transport ◽  
Halide Perovskites ◽  
Excitonic Energy

We present transient microscopy measurements of interlayer energy transport in (PEA)<sub>2</sub>PbI<sub>4</sub> perovskite. We find efficient interlayer exciton transport (0.06 cm<sup>2</sup>/s), which translates into a diffusion length that exceeds 100 nm and a sub-ps timescale for energy transfer. While still slower than in-plane exciton transport (0.2 cm<sup>2</sup>/s), our results show that excitonic energy transport is considerably less anisotropic than charge-carrier transport for 2D perovskites.

scholarly journals Giant enhancement of exciton diffusivity in two-dimensional semiconductors

2020 ◽  
Vol 6 (51) ◽  
pp. eabb4823
Author(s):  
Yiling Yu ◽  
Yifei Yu ◽  
Guoqing Li ◽  
Alexander A. Puretzky ◽  
David B. Geohegan ◽  
...  
Keyword(s):  
Threshold Value ◽  
Great Promise ◽  
Two Dimensional ◽  
Incident Power ◽  
Many Body ◽  
Device Development ◽  
Exciton Transport ◽  
2D Semiconductors ◽  
Many Body Interactions ◽  
Exciton Scattering

Two-dimensional (2D) semiconductors bear great promise for application in optoelectronic devices, but the low diffusivity of excitons stands as a notable challenge for device development. Here, we demonstrate that the diffusivity of excitons in monolayer MoS2 can be improved from 1.5 ± 0.5 to 22.5 ± 2.5 square centimeters per second with the presence of trapped charges. This is manifested by a spatial expansion of photoluminescence when the incident power reaches a threshold value to enable the onset of exciton Mott transition. The trapped charges are estimated to be in a scale of 1010 per square centimeter and do not affect the emission features and recombination dynamics of the excitons. The result indicates that trapped charges provide an attractive strategy to screen exciton scattering with phonons and impurities/defects. Pointing towards a new pathway to control exciton transport and many-body interactions in 2D semiconductors.

Probing Exciton Transport in Squaraine Polymers Using Fifth-Order Two-Dimensional Spectroscopy

2020 ◽  
Author(s):  
Julian Lüttig ◽  
Pavel Malý ◽  
Arthur Turkin ◽  
Katja Mayershofer ◽  
Simon Büttner ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Exciton Transport ◽  
Fifth Order

scholarly journals Dynamic localization of electronic excitation in photosynthetic complexes revealed with chiral two-dimensional spectroscopy

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Andrew F. Fidler ◽  
Ved P. Singh ◽  
Phillip D. Long ◽  
Peter D. Dahlberg ◽  
Gregory S. Engel
Keyword(s):  
Electronic Excitation ◽  
Two Dimensional ◽  
Dynamic Localization ◽  
Photosynthetic Complexes

scholarly journals Two-dimensional spatiotemporal Fourier transform with femtosecond pulses for on-chip devices

2021 ◽  
Author(s):  
Yulong Wang ◽  
Changjun Min ◽  
Yuquan Zhang ◽  
Xiaocong Yuan
Keyword(s):  
Fourier Transform ◽  
Surface Plasmon Polariton ◽  
Optical Computing ◽  
Spatial Modulation ◽  
Two Dimensional ◽  
Optical Pulses ◽  
Optical Signals ◽  
Temporal Domain ◽  
Ring Shape ◽  
On Chip

Abstract On-chip manipulation of the spatiotemporal characteristics of optical signals is important in the transmission and processing of information. However, the simultaneous modulation of on-chip optical pulses, both spatially at the nano-scale and temporally over ultra-fast intervals, is challenging. Here, we propose a two-dimensional spatiotemporal Fourier transform (FT) method for on-chip control of the propagation of femtosecond optical pulses and verify this method employing surface plasmon polariton (SPP) pulses on metal surface. By varying space- and frequency-dependent parameters, we demonstrate that the traditional SPP focal spot may be bent into a ring shape, and that the direction of propagation of a curved SPP-Airy beam may be reversed at certain moments to create an S-shaped path. Compared with conventional spatial modulation of SPPs, this method offers potentially a variety of extraordinary effects in SPP modulation especially associated with the temporal domain, thereby providing a new platform for on-chip spatiotemporal manipulation of optical pulses with applications including ultrafast on-chip photonic information processing, ultrafast pulse/beam shaping, and optical computing.

Electrochemically Probing Exciton Transport in Monolayers of Two-Dimensional Semiconductors

2021 ◽  
Author(s):  
Chloe L. Tolbert ◽  
Caleb Hill
Keyword(s):  
Thick Films ◽  
Wide Area ◽  
Two Dimensional ◽  
Exciton Transport ◽  
Catalytic Applications

Two-dimensional semiconductors (2DSCs) are attractive for a variety of optoelectronic and catalytic applications due to their ability to be fabricated as wide-area, monolayer-thick films and their unique optical and electronic...

Sign in / Sign up

Export Citation Format

Share Document