Hyperspectral infrared imaging of surface phonon-polaritons in 
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Lahneman, David; Qazilbash, M. M.

doi:10.1103/physrevb.104.235433

Cited by 13 publications

(14 citation statements)

References 84 publications

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“…While the high quality factor PhPs have been observed in intrinsically layered MoO 3 flakes [246], highly confined PhPs are also predicted in the monolayer films of non-layered TMOs [247]. Surface PhPs have been recently observed in SrTiO 3 [248] in a wide range of frequencies from THz to mid-infrared. Moreover, the artificial TMO superlattices exhibit hyperbolic properties [249] which can serve as a precursor for the confined PhPs.…”

Section: Light-matter Interactionsmentioning

confidence: 99%

Freestanding complex-oxide membranes

Pesquera

Fernández

Khestanova

et al. 2022

J. Phys.: Condens. Matter

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Complex oxides show a vast range of functional responses, unparalleled within the inorganic solids realm, making them promising materials for applications as varied as next-generation field-effect transistors, spintronics, electro-optic modulators, pyroelectric detectors, or oxygen reduction catalysts. Their stability in ambient conditions, chemical versatility, and large susceptibility to minute structural and electronic modifications make them ideal subjects of study to discover emergent phenomena and to generate novel functionalities for next-generation devices. Recent advances in the synthesis of single-crystal, freestanding complex oxide membranes provide an unprecedented opportunity to study these materials in a nearly-ideal system (e.g., free of mechanical/thermal interaction with substrates) as well as expanding the range of tools for tweaking their order parameters (i.e., (anti-)ferromagnetic, (anti-)ferroelectric, ferroelastic), and increasing the possibility of achieving novel heterointegration approaches (including interfacing dissimilar materials) by avoiding the chemical, structural, or thermal constraints in synthesis processes. Here, we review the recent developments in the fabrication and characterization of complex-oxide membranes and discuss their potential for unraveling novel physicochemical phenomena at the nanoscale and for futher exploiting their functionalities in technologically relevant devices.

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Section: Light-matter Interactionsmentioning

confidence: 99%

Freestanding complex-oxide membranes

Pesquera

Fernández

Khestanova

et al. 2022

J. Phys.: Condens. Matter

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“…Graphene aligned with hBN hosts two electronic bands with a small gap, 42 while the SrTiO 3 surface provides surface phonon polaritons at a similar frequency as the gap. 43,44 We estimate that photo-induced pairing in graphene could be found up to a critical temperature of around 15K.…”

Section: Introductionmentioning

confidence: 97%

Theory of resonantly enhanced photo-induced superconductivity

Michael,

Eckhardt,

Chattopadhyay

et al. 2023

Preprint

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Optical driving of materials has emerged as a versatile tool to control their properties, with photo-induced superconductivity being among the most fascinating examples. In this work, we show that light or lattice vibrations coupled to an electronic interband transition naturally give rise to electron-electron attraction that may be enhanced when the underlying boson is driven into a non-thermal state. We find this phenomenon to be resonantly amplified when tuning the boson’s frequency close to the energy difference between the two electronic bands. This result offers a simple microscopic mechanism for photo-induced superconductivity and provides a recipe for designing new platforms in which light-induced superconductivity can be realized. We propose a concrete setup consisting of a graphene hBN-SrTiO3 heterostructure, for which we estimate a superconducting Tc that may be achieved upon driving the system.

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“…Niobium (Nb)-doped STO materials, which exhibit electrical conductivity [22] and a negative real permittivity within the 8-14 µm atmospheric window band [23], have been extensively utilized in civilian sectors, including infrared thermography [24], medical applications [25], and remote sensing [26]. This distinctive property renders them highly advantageous for phonon enhancement applications in the development of infrared detectors.…”

Section: Introductionmentioning

confidence: 99%

Enhancing mid-infrared surface phonon polariton modes: optimization of structural parameters in Nb-doped SrTiO₃ with hole array structures for advanced infrared sensors

Zhang,

Wan,

Cheng

et al. 2024

J. Phys. D: Appl. Phys.

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This study utilized the Finite Difference Time Domain (FDTD) method to investigate the mid infrared surface phonon polarity (SPhPs) and localized surface phonon resonance (LSPhRs) in undoped and niobium (Nb)-doped SrTiO3 (STO) with planar and hole array structures. Research has shown that Nb-doped STO operates in the Reststrahlen band of 8.06-18.48 µm, providing a wider spectral response than undoped STO (12.58-18.26 µm) and effectively covering the atmospheric window of long wave infrared. This indicates that the increase in virtual permittivity has the least impact on spectral broadening, indicating that the new infrared sensor technology has broad prospects. The optimization of structural parameters, including the period, filling factor, and depth of STO hole arrays, as well as the response to changes in incident light angle, is crucial for guiding the design of high-performance optoelectronic devices. In addition, this study explored the excitation of four resonant modes within a hole array and analysed their relationship with array parameters to enhance the design of optoelectronic applications.

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Hyperspectral infrared imaging of surface phonon-polaritons in SrTiO3

Cited by 13 publications

References 84 publications

Freestanding complex-oxide membranes

Freestanding complex-oxide membranes

Theory of resonantly enhanced photo-induced superconductivity

Enhancing mid-infrared surface phonon polariton modes: optimization of structural parameters in Nb-doped SrTiO₃ with hole array structures for advanced infrared sensors

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Hyperspectral infrared imaging of surface phonon-polaritons in SrTiO3

Cited by 13 publications

References 84 publications

Freestanding complex-oxide membranes

Freestanding complex-oxide membranes

Theory of resonantly enhanced photo-induced superconductivity

Enhancing mid-infrared surface phonon polariton modes: optimization of structural parameters in Nb-doped SrTiO3 with hole array structures for advanced infrared sensors

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Product

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Enhancing mid-infrared surface phonon polariton modes: optimization of structural parameters in Nb-doped SrTiO₃ with hole array structures for advanced infrared sensors