Academic Journal
Mid-Infrared Mapping of Four-Layer Graphene Polytypes Using Near-Field Microscopy
| العنوان: | Mid-Infrared Mapping of Four-Layer Graphene Polytypes Using Near-Field Microscopy |
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| المؤلفون: | Daniel Beitner, Shaked Amitay, Simon Salleh Atri, Andrew McEllistrim, Tom Coen, Vladimir I. Fal’ko, Shachar Richter, Moshe Ben Shalom, Haim Suchowski |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Biophysics, Medicine, Microbiology, Neuroscience, Biotechnology, Immunology, Environmental Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, Information Systems not elsewhere classified, 5 – 11, tunable optical properties, finite dipole model, calculated optical conductivity, binding model suggests, distinct tetralayer polytypes, 5 μm range, binding model, optical response, utilize scattering, significant discrepancy, scanning near, promising platforms, polytype obtained, particularly interesting, observation implies, noncentrosymmetric abcb, intrinsic bandgap, internal polarization, increased potential |
| الوصف: | The mid-infrared (MIR) spectral region attracts attention for accurate chemical analysis using photonic devices. Few-layer graphene (FLG) polytypes are promising platforms, due to their broad absorption in this range and gate-tunable optical properties. Among these polytypes, the noncentrosymmetric ABCB/ACAB structure is particularly interesting, due to its intrinsic bandgap (8.8 meV) and internal polarization. In this study, we utilize scattering-scanning near-field microscopy to measure the optical response of all three tetralayer graphene polytypes in the 8.5–11.5 μm range. We employ a finite dipole model to compare these results to the calculated optical conductivity for each polytype obtained from a tight-binding model. Our findings reveal a significant discrepancy in the MIR optical conductivity response of graphene between the different polytypes than what the tight-binding model suggests. This observation implies an increased potential for utilizing the distinct tetralayer polytypes in photonic devices operating within the MIR range for chemical sensing and infrared imaging. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | https://figshare.com/articles/journal_contribution/Mid-Infrared_Mapping_of_Four-Layer_Graphene_Polytypes_Using_Near-Field_Microscopy/24635316 |
| DOI: | 10.1021/acs.nanolett.3c02819.s001 |
| الاتاحة: | https://doi.org/10.1021/acs.nanolett.3c02819.s001 https://figshare.com/articles/journal_contribution/Mid-Infrared_Mapping_of_Four-Layer_Graphene_Polytypes_Using_Near-Field_Microscopy/24635316 |
| Rights: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.2893C626 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acs.nanolett.3c02819.s001 |
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