{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["6"],"submitter":["Li P"],"pubmed_abstract":["Hyperbolic materials exhibit sub-diffractional, highly directional, volume-confined polariton modes. Here we report that hyperbolic phonon polaritons allow for a flat slab of hexagonal boron nitride to enable exciting near-field optical applications, including unusual imaging phenomenon (such as an enlarged reconstruction of investigated objects) and sub-diffractional focusing. Both the enlarged imaging and the super-resolution focusing are explained based on the volume-confined, wavelength dependent propagation angle of hyperbolic phonon polaritons. With advanced infrared nanoimaging techniques and state-of-art mid-infrared laser sources, we have succeeded in demonstrating and visualizing these unexpected phenomena in both Type I and Type II hyperbolic conditions, with both occurring naturally within hexagonal boron nitride. These efforts have provided a full and intuitive physical picture for the understanding of the role of hyperbolic phonon polaritons in near-field optical imaging, guiding, and focusing applications."],"journal":["Nature communications"],"pagination":["7507"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC4491815"],"repository":["biostudies-literature"],"pubmed_title":["Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging and focusing."],"pmcid":["PMC4491815"],"pubmed_authors":["Lewin M","Caldwell JD","Gaussmann F","Li P","Watanabe K","Novoselov KS","Taniguchi T","Taubner T","Kretinin AV"],"additional_accession":[]},"is_claimable":false,"name":"Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging and focusing.","description":"Hyperbolic materials exhibit sub-diffractional, highly directional, volume-confined polariton modes. Here we report that hyperbolic phonon polaritons allow for a flat slab of hexagonal boron nitride to enable exciting near-field optical applications, including unusual imaging phenomenon (such as an enlarged reconstruction of investigated objects) and sub-diffractional focusing. Both the enlarged imaging and the super-resolution focusing are explained based on the volume-confined, wavelength dependent propagation angle of hyperbolic phonon polaritons. With advanced infrared nanoimaging techniques and state-of-art mid-infrared laser sources, we have succeeded in demonstrating and visualizing these unexpected phenomena in both Type I and Type II hyperbolic conditions, with both occurring naturally within hexagonal boron nitride. These efforts have provided a full and intuitive physical picture for the understanding of the role of hyperbolic phonon polaritons in near-field optical imaging, guiding, and focusing applications.","dates":{"release":"2015-01-01T00:00:00Z","publication":"2015 Jun","modification":"2025-04-04T11:06:41.4Z","creation":"2019-03-27T01:54:34Z"},"accession":"S-EPMC4491815","cross_references":{"pubmed":["26112474"],"doi":["10.1038/ncomms8507"]}}