Unknown

Dataset Information

0

Subwavelength Terahertz Imaging of Graphene Photoconductivity.


ABSTRACT: Using a spatially structured, optical pump pulse with a terahertz (THz) probe pulse, we are able to determine spatial variations of the ultrafast THz photoconductivity with subwavelength resolution (75 ?m ? ?/5 at 0.8 THz) in a planar graphene sample. We compare our results to Raman spectroscopy and correlate the existence of the spatial inhomogeneities between the two measurements. We find a strong correlation with inhomogeneity in electron density. This demonstrates the importance of eliminating inhomogeneities in doping density during CVD growth and fabrication for photoconductive devices.

SUBMITTER: Hornett SM 

PROVIDER: S-EPMC5115732 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature

altmetric image

Publications

Subwavelength Terahertz Imaging of Graphene Photoconductivity.

Hornett Samuel M SM   Stantchev Rayko I RI   Vardaki Martha Z MZ   Beckerleg Chris C   Hendry Euan E  

Nano letters 20161018 11


Using a spatially structured, optical pump pulse with a terahertz (THz) probe pulse, we are able to determine spatial variations of the ultrafast THz photoconductivity with subwavelength resolution (75 μm ≈ λ/5 at 0.8 THz) in a planar graphene sample. We compare our results to Raman spectroscopy and correlate the existence of the spatial inhomogeneities between the two measurements. We find a strong correlation with inhomogeneity in electron density. This demonstrates the importance of eliminati  ...[more]

Similar Datasets

| S-EPMC5347152 | biostudies-literature
| S-EPMC5607252 | biostudies-literature
| S-EPMC4319153 | biostudies-literature
| S-EPMC4893690 | biostudies-literature
| S-EPMC3514499 | biostudies-literature
| S-EPMC6081463 | biostudies-literature
| S-EPMC4131213 | biostudies-literature
| S-EPMC5590661 | biostudies-literature
| S-EPMC6300605 | biostudies-literature
| S-EPMC5094464 | biostudies-literature