Related Experiment Video
Updated: Aug 3, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Two-photon absorption in gapped bilayer graphene with a tunable chemical potential
M K Brinkley1, D S L Abergel2,3, B D Clader1
1Research and Exploratory Development Department, Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20973, USA.
Bilayer graphene offers tunable band gaps and electron densities, making it ideal for optoelectronics. This study details its optical absorption properties, crucial for designing new nonlinear optical devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Optoelectronics
Background:
- Bilayer graphene is a unique 2D material with tunable band gap and electron density.
- Its simple fabrication and tunable properties make it critical for optoelectronic applications.
Purpose of the Study:
- To calculate one- and two-photon absorption coefficients for bilayer graphene.
- To analyze absorptive behavior under varying conditions (photon energy, gap, chemical potential, temperature).
Main Methods:
- Theoretical calculation of absorption coefficients.
- Analysis of degenerate interband absorption in bilayer graphene.
- Characterization over wide ranges of physical parameters.
Main Results:
- The two-photon absorption coefficient exhibits complex behavior due to multiple pathways and band dispersion.
- Comprehensive characterization of optical absorption across various parameters was achieved.
Conclusions:
- The findings are integral for designing bilayer graphene-based nonlinear optical devices.
- This systematic work provides essential data for future optoelectronic applications.
More Related Videos
11:33All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
07:51Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
Published on: February 1, 2022
Related Concept Videos
Molecular Spectroscopy: Absorption and Emission
UV–Vis Spectroscopy: Molecular Electronic Transitions