scholarly journals Transient exciton-polariton dynamics in WSe2by ultrafast near-field imaging

2019 ◽  
Vol 5 (2) ◽  
pp. eaat9618 ◽  
Author(s):  
M. Mrejen ◽  
L. Yadgarov ◽  
A. Levanon ◽  
H. Suchowski
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Coherent Control ◽  
Near Field ◽  
Imaging Method ◽  
Strong Light ◽  
Pump Probe ◽  
Near Field Imaging ◽  
Light Matter Interaction ◽  
Field Imaging

Van der Waals (vdW) materials offer an exciting platform for strong light-matter interaction enabled by their polaritonic modes and the associated deep subwavelength light confinement. Semiconductor vdW materials such as WSe2are of particular interest for photonic and quantum integrated technologies because they sustain visible–near-infrared (VIS-NIR) exciton-polariton (EP) modes at room temperature. Here, we develop a unique spatiotemporal imaging technique at the femtosecond-nanometric scale and observe the EP dynamics in WSe2waveguides. Our method, based on a novel ultrafast broadband intrapulse pump-probe near-field imaging, allows direct visualization of EP formation and propagation in WSe2showing, at room temperature, ultraslow EP with a group velocity ofvg~ 0.017c. Our imaging method paves the way for in situ ultrafast coherent control and extreme spatiotemporal imaging of condensed matter.

NEAR FIELD IMAGING OF THE TRANSIENT COLLISIONAL EXCITATION Ni-LIKE Ag X-RAY LASER

2002 ◽  
Vol 09 (01) ◽  
pp. 641-644 ◽  
Author(s):  
MOMOKO TANAKA ◽  
TETSUYA KAWACHI ◽  
MASATAKA KADO ◽  
NOBORU HASEGAWA ◽  
KOUTA SUKEGAWA ◽  
...  
Keyword(s):  
Near Field ◽  
Target Surface ◽  
Imaging Method ◽  
Collisional Excitation ◽  
Spatial Profile ◽  
X Ray ◽  
Near Field Imaging ◽  
Field Imaging

The spatial profile of the transient collisional excitation Ni-like Ag X-ray laser in various plasma lengths was observed using the near field imaging method. The gain region was the size of 50 μm and 30–50 μm distant from the target surface. The shapes of the gain region were crescent shape or consisted of two spots.

Characterization of thin-film optical properties by THz near-field imaging method

2019 ◽  
Vol 36 (9) ◽  
pp. 2593 ◽  
Author(s):  
F. Amirkhan ◽  
R. Sakata ◽  
K. Takiguchi ◽  
T. Arikawa ◽  
T. Ozaki ◽  
...  
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Near Field ◽  
Imaging Method ◽  
Near Field Imaging ◽  
Field Imaging

scholarly journals Efficient Near-Field Imaging Using Cylindrical MIMO Arrays

2021 ◽  
pp. 1-1
Author(s):  
Shiyong Li ◽  
Shuoguang Wang ◽  
Moeness G. Amin ◽  
Guoqiang Zhao
Keyword(s):  
Near Field ◽  
Near Field Imaging ◽  
Mimo Arrays ◽  
Field Imaging
Sign in / Sign up

Export Citation Format

Share Document