Tag: phonon polaritons
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Directing Interfacial Heat Flow via Hyperbolic Phonon Polaritons in Hexagonal Boron Nitride
Saman ZareUniversity of Virginia, Charlottesville, Virginia, USA _______________________________________ With the continued miniaturization of electronic devices to the nanoscale, heat generation approaches quantum limits, leading to significant increases in scattering and subsequent reductions in conventional thermal conduction. In parallel, ongoing advancements in nanoscale thermal engineering have identified radiative mechanisms as potential pathways to precisely tune both…
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hBN-Based Photonic Crystal Cavities for Photonic Integrated Circuits
Sunjung AnKyung Hee University, Seoul, Republic of Korea _______________________________________ We report narrowband thermal radiation from a graphene emitter integrated with a hexagonal boron nitride (hBN) photonic crystal cavity (PCC). The graphene emitter, encapsulated by hBN,shows broadband thermal radiation[1]. By fabricating hBN PCCs with a designed array of holes,including defects, and integrating the graphene emitter into…
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Gate-tunable polariton reflection in hBN-graphene heterostructures
Siyuan DaiAuburn University – Auburn, Alabama, USA_______________________________________ The variation of optical momentum determines light propagation across material interfaces. Evident momentum mismatch at the two sides of the interface results in inefficient energy transfer due to the lack of phase matching, thereby causing light reflection or scattering. In this work, we demonstrate an electrically tunable polaritonic…
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Phonon polaritons for twistoptics and strong vibrational coupling at the nanoscale
Pablo Alonso-González University of Oviedo – Asturias, Spain_______________________________________ Strong coupling between light and molecular vibrations (Vibrational Strong Coupling, VSC) is of great fundamental and technological interest, as it promises the ability to manipulate molecular properties such as chemical reactivity, selectivity, and photostability. Recent experiments have studied VSC at the nanoscale using phonon polaritons in h-BN,…
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Strong thermal effects of phonon polaritons in low-loss boron nitride nanotubes
Deyu LiVanderbilt University – Nashville, Tennessee, USA_______________________________________ Phonon polaritons (PhPs) have attracted extensive attention in the study of light-matter interactions because of their origin as the hybrid modes generated from coupling between infrared photons and optically active phonons. In terms of energy transport, while the contribution of surface phonon polaritons (SPhPs) to near-field radiation has…