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Anisotropic Generation and Detection of Coherent $A_{g}$ Phonons in Black Phosphorus
| Content Provider | MDPI |
|---|---|
| Author | Lee, Seong-Yeon Yee, Ki-Ju |
| Copyright Year | 2021 |
| Description | Black phosphorus (BP) has attracted great attention due to its layer-tuned direct bandgap, in-plane anisotropic properties, and novel optoelectronic applications. In this work, the anisotropic characteristics of BP crystal in terms of the Raman tensor and birefringence are studied by investigating polarization dependence in both the generation and detection of Ag mode coherent phonons. While the generated coherent phonons exhibit the typical linear dichroism of BP crystal, the detection process is found here to be influenced by anisotropic multiple thin film interference, showing wavelength and sample thickness sensitive behaviors. We additionally find that the Ag 1 and Ag 2 optical phonons decay into lower frequency acoustic phonons through the temperature-dependent anharmonic process. |
| Starting Page | 1202 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11051202 |
| Journal | Nanomaterials |
| Issue Number | 5 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-05-01 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Quantum Science and Technology Black Phosphorus Optical Anisotropy Coherent Ag Phonons |
| Content Type | Text |
| Resource Type | Article |
