Anisotropic nonlinear optical response in a graphene oxide-gold nanohybrid
| Autor: | Rituraj Sharma, J. Aneesh, Tuhin Kumar Maji, Debjani Karmakar, K. V. Adarsh, Rajesh Kumar Yadav |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Graphene Oxide Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Absorbance chemistry.chemical_compound Nonlinear optical Optics chemistry law 0103 physical sciences Limiter Optoelectronics 0210 nano-technology business Absorption (electromagnetic radiation) Anisotropy Order of magnitude |
| Zdroj: | Optics letters. 45(24) |
| ISSN: | 1539-4794 |
| Popis: | In this Letter, we report for the first time, to the best of our knowledge, the anisotropic optical response in a graphene oxide (GO)-gold (Au) nanohybrid. Polarization-sensitive nonlinear optical absorption measurements revealed that nanohybrids are highly anisotropic, ( β ⊥ − β ‖ ) ≈ 28 c m / G W , which is more than one order of magnitude higher than that of control GO (2 cm/GW). The first-principle analysis of absorbance at nanohybrid interfaces with varying functional ligand concentrations corroborates with the experimentally observed intrinsic linear anisotropy. Thus, this Letter enables new routes to realize smart and high-performing nonlinear optical systems selectively and directionally such as tunable optical limiters and optical data processing devices. |
| Databáze: | OpenAIRE |
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