Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session K40: Meta Structures and PropertiesFocus
|
Hide Abstracts |
Sponsoring Units: DMP Chair: Weidong Zhou, University of Texas at Arlington; Igal Brener, Sandia National Laboratories Room: Room 232 |
Tuesday, March 7, 2023 3:00PM - 3:36PM |
K40.00001: Prof. Lan Yang (yang@seas.wustl.edu; Washington University in St. Louis), Invited Speaker: Lan Yang
|
Tuesday, March 7, 2023 3:36PM - 3:48PM |
K40.00002: Invertible Optical Nonlinearity in Epsilon-near-zero Materials Xinyu Tian, Chentao Li, Guoce Yang, Sukrith U Dev, Monica S Allen, Jeffery W Allen, Hayk Harutyunyan Epsilon-near-zero (ENZ) materials have attracted great interest recently for their astonishing optical properties, especially the potential in realizing large nonlinearities. Indium tin oxide(ITO), as one of the most popular ENZ materials, is known for its mature fabrication technology and easy tunability of plasma frequency. In the talk, we present our exploration on the origin of a large, spectrally-invertible nonlinearity in ITO thin films. We investigate the two underlying competing factors, Fermi energy shift and band nonparabolicity. We propose a theoretical model including both interband and intraband transitions in ITO during nonlinear generation. It is confirmed by femtosecond pump-probe experiments on a series of ITO films with various ENZ wavelengths under UV/NIR excitations. Typically, the spectral inversion of nonlinearity based on this competing mechanism is observed for the first time. Our work provides a useful insight of tailoring the intrinsic material properties of ENZ materials to create a large optical nonlinearity. |
Tuesday, March 7, 2023 3:48PM - 4:00PM |
K40.00003: Thermally tunable cavity resonance of the propagating surface phonon polaritons based on vanadium dioxide-silicon carbide metasurfaces SATYANARAYANA R KACHIRAJU, Myoung-Hwan Kim, Ayrton A Bernussi, Vladimir Kuryatkov, Zach M Brown, Imtiaz Ahmad, Yejin Kwon, Long Chang, Aiping Chen, Sundar Kunwar, Pinku Roy Vanadium dioxide (VO2) is a promising candidate as a tunable optical material realizing reconfigurable metasurfaces. The dramatic change in the complex refractive index across the insulator-to-metal phase transition (IMT) at room temperature enables optical resonance tuning and switching in photonic devices. VO2 has been widely used in visible and near-infrared photonics applications, but not for longer infrared because of the lossy metallic behavior of VO2. Here, we propose a new way to utilize VO2 in long-wave infrared applications. We experimentally and numerically demonstrated thermally tunable metal(gold)-active dielectric (VO2)-polar dielectric (SiC) cavity hosting a propagating surface phonon polaritons which are very sensitive to the dielectric refractive index of VO2. Below the IMT temperature, the complex index grows rapidly with temperature which results in resonance shift. We fabricated 40 nm thick gold grating (periodicity = 900 nm, gap = 100 nm) patterned on 100 nm thick VO2 film on 6H-SiC. The cavity resonance at 835 cm-1 shows a 25 cm-1 redshift at 50 C because the higher refractive index allows longer wavelength confined in the cavity. This work benefits the development of mid-/far infrared reconfigurable metasurfaces and active photonic devices. |
Tuesday, March 7, 2023 4:00PM - 4:12PM |
K40.00004: Confined plasmonic waves in the multicoaxial metamaterial cables: Zero magnetic field Manvir S Kushwaha, Bahram Djafari-Rouhani We use an elegant response function theory, which does not require matching of the messy boundary conditions, to investigate the surface plasmon excitations in the multicoaxial cylindrical cables made up of negative-index metamaterials. The multicoaxial cables with {em dispersive} metamaterial components exhibit rather richer (and complex) plasmon spectrum with each interface supporting two modes: one TM and the other TE for (the integer order of the Bessel function) $m e 0$. The cables with {em nondispersive} metamaterial components bear a different tale: they do not support simultaneously both TM and TE modes over the whole range of propagation vector. The computed local and total density of states enable us to substantiate spatial positions of the modes in the spectrum. Such quasi-one dimensional systems as studied here should prove to be the milestones of the emerging optoelectronics and telecommunications systems1. 1. M.S. Kushwaha and B. Djafari-Rouhani, J. Opt. Soc. Am. B 27, 148 (2010); 27, 605 (2010). |
Tuesday, March 7, 2023 4:12PM - 4:24PM |
K40.00005: Silicon Nitride Metagratings for Self-Stabilizing Lightsails Ramon Gao, Michael D Kelzenberg, Yonghwi Kim, Lior Michaeli, Ognjen Ilic, Harry Atwater Accelerating lightsails to relativistic speeds with laser radiation pressure will foster interstellar exploration as envisioned by the Breakthrough Starshot Initiative. Such ultralight spacecrafts must ride the laser beam without external corrective actions, which can be achieved by tailoring their light scattering anisotropy. |
Tuesday, March 7, 2023 4:24PM - 4:36PM |
K40.00006: Local wavefront manipulation with high quality factor metasurfaces Claudio U Hail, Morgan Foley, Ruzan Sokhoyan, Lior Michaeli, Harry Atwater We report on an all-dielectric higher-order Huygens metasurface for local wavefront manipulation in two dimensions with high quality factor at near-infrared wavelengths. Our metasurface consists of a subwavelength-spaced array of high index nanopillars exhibiting spectrally overlapped electric dipole and electric octupole modes. The local control over these modes enables modulating the phase of the transmitted light with only a ±1% change in the nanopillar dimensions. Based on this, we experimentally realize beam deflection along two perpendicular dimensions with quality factors ranging between Q = 300–1472, and radial metalenses with quality factors up to Q = 916. The local control over the wavefront allows operation with finite illumination apertures and angled illumination. Our results contrast with other high-quality-factor optical metasurfaces which rely on guided mode resonances or bound states in the continuum, limiting their application to one-dimensional wavefront shaping or geometric phase tuning, respectively. |
Tuesday, March 7, 2023 4:36PM - 4:48PM |
K40.00007: Shaping contactless mechanical forces through anomalous metasurface scattering Ognjen Ilic, Matthew Stein, Sam Keller, Yujie Luo Waves impart momentum and exert force on obstacles in their path. The transfer of wave momentum is a fundamental mechanism for contactless manipulation, yet the rules of conventional scattering intrinsically limit the radiation force based on the shape and the size of the manipulated object. In this work, we show that this intrinsic limit can be broken for acoustic waves with subwavelength-structured surfaces (metasurfaces), where the force becomes controllable by the arrangement of surface features, independent of the object's overall shape and size. We will discuss how such anomalous metasurface scattering can be harnessed to demonstrate complex actuation phenomena, such as self-guidance, where a metasurface object is autonomously guided by an acoustic wave, and tractor beaming, where a metasurface object is pulled by the wave. Our results show that bringing metasurface physics of acoustic waves, and its full arsenal of tools, to the domain of mechanical manipulation opens new frontiers in contactless actuation and enables diverse actuation mechanisms that are beyond the limits of traditional wave-matter interactions. |
Tuesday, March 7, 2023 4:48PM - 5:00PM |
K40.00008: Nonlinear Strong Coupling by Second-Harmonic Generation Enhancement in Plasmonic Nanopatch Antennas Bryson J Krause, Dhananjay Mishra, Jiyang Chen, Christos Argyropoulos, Thang B Hoang Electromagnetic enhancements generated in plasmonic nanocavities have enabled many interesting photonic phenomena which are widely applicable to emerging technologies in both the linear and nonlinear optical regimes. In the present study, strong second-harmonic generation (SHG) is demonstrated in plasmonic nanopatch antennas (NPAs) formed with silver nanocubes separated from a smooth gold film by a nm-scale zinc oxide gap layer. When compared to the SHG generated by the zinc oxide layer on gold film, the NPAs display a 104-fold increase in the intensity of the SHG signal at resonant plasmon frequency. More importantly, by integrating quantum emitters with an absorption energy matched to the fundamental frequency of the NPAs, a second-order exciton-polariton strong coupling response with a Rabi splitting energy of 19 meV is reported. As such, the nonlinear frequency-converting NPAs fabricated in this study could be utilized for the control of the light−matter interactions in both weak and strong coupling regimes, providing a powerful tool for use in emerging optical engineering and information processing technologies. |
Tuesday, March 7, 2023 5:00PM - 5:12PM |
K40.00009: Characterization of Lightsail Light-Matter Interaction and Nonlinear Dynamics by Microscopic Common-Path Vibrometry Lior Michaeli, Ramon Gao, Michael D Kelzenberg, Claudio U Hail, Harry Atwater Dynamic control of macroscopic objects with light has recently became a flourishing research front, largely catalyzed by the ambitious goal of the Breakthrough Starshot Initiative to launch laser-driven lightsails for space exploration. However, for a high-intensity optical drive the heat generated in the lightsail will inevitably affect its dynamics. We have developed a method based on a microscopic common path vibrometer to perform sensitive optical measurements and characterize the light-matter interaction and heat-induced nonlinearity of lightsails. We report the observation of rich nonlinear dynamics in optically pumped tethered silicon nitride lightsails. These include high-order parametric instabilities, injection locking, frequency-mixing and hysteresis induced by Duffing nonlinearity. We find that the spectral positions of the parametric instability tongues deviate from the expected subharmonic 2ω0/n law due to an interplay between the alternating and averaged heat distribution within the samples. We show that this effect can be used to quantify the rate of heat dissipation within the subwavelength thick lightsails. Our results advance the understanding of lightsail nonlinear dynamics and pave the way towards judicious heat management of optically manipulated objects. |
Tuesday, March 7, 2023 5:12PM - 5:24PM |
K40.00010: Bio-Inspired Nanonetwork-Structured Materials from Bottom-Up Approach as Mechanical Metamaterials Hassan Sadek, Rong-Ming Ho, suhail siddique, Chang-Chun Lee, Chi-Wei Wang, Shou-Yi Chang Nature has long been an outstanding source for inspiring structural designs for fabricating materials with unrivaled mechanical properties, outperforming man-made materials. Inspired by Mantis shrimp, this work aims to suggest a bottom-up approach for the fabrication of well-ordered nanonetwork hydroxyapatite (HAp) thin film using self-assembled polystyrene-block-polydimethylsiloxane (PS-b-PDMS) block copolymer (BCP) with a diamond nanostructure as a template for templated sol-gel reaction. Based on nanoindentation uniaxial micro-compression results, the well-ordered nanonetwork HAp shows high energy dissipation, high energy absorption per volume, and high compression strength, outperforming many cellular materials due to the topologic effect at the nanoscale. Interestingly, similar approach can be applied to mimic the skeleton structure of knobby starfish, providing a bottom-up approach for fabricating nanonetwork-structured single-crystal calcite. The diamond-structured calcite exhibits exceptional specific energy absorption superior to natural materials from a bottom-up approach and artificial counterparts from a top-down approach due to the deliberate structuring at the nanosize. This work highlights the potential of exploiting BCP templated synthesis to fabricate well-ordered nanonetwork monoliths, giving rise to the brittle-to-ductile transition, and thus appealing mechanical properties with the character of mechanical metamaterials. |
Tuesday, March 7, 2023 5:24PM - 5:36PM |
K40.00011: Direct Observation of Kirchhoff Thermal Radiation Law Violation Komron J Shayegan, Bo Zhao, Souvik Biswas, Shanhui Fan, Harry Atwater Thermal emission, the process through which all objects with finite temperature radiate electromagnetic energy, has generally been thought to obey reciprocity whereby absorbed and emitted radiation from a body are equal for a given wavelength and angular channel. We report direct experimental measurement of an inequality between the thermal emissivity and absorptivity for a photonic structure that supports a transverse magnetic guided-mode resonance (GMR) coupled to a magneto-optic material. This inequality occurs under the application of an in-plane magnetic field that changes the permittivity of the magneto-optic InAs to a non-diagonal tensor. The non-diagonal permittivity tensor results in an antisymmetric angular relationship where the magnetic tuning of stronger thermal emission for a given angle of incidence correlates to stronger absorption in the opposite channel. We relate this to the Onsager-Casimir relations for a nonreciprocal absorber. Using an angle-resolved thermal emission spectroscopy (ARTES) setup, we observe that the Kirchhoff-violating behavior is most pronounced where the GMR and the InAs’ Brewster mode spectrally overlap (12.8 – 12.5 um) for an angular range of 60 - 80°. The tuning of larger emissivity saturates at the blackbody limit; the lower bounds of the emissivity tuning is limited by the low-emissivity limit of the InAs. We also discuss the conical diffraction mounting of the sample in an external magnetic field and its implications for future Kirchhoff-violating emitters. |
Tuesday, March 7, 2023 5:36PM - 5:48PM |
K40.00012: Multiple Landau polariton branches in the ultrastrong coupling regime in a multi-mode three-dimensional photonic-crystal cavity Fuyang Tay, Ali Mojibpour, Shuang Liang, Andrey Baydin, Arash Ahmadivand, Geoff C Gardner, Michael J Manfra, David Hagenmüller, Junichiro Kono One-dimensional (1D) photonic-crystal cavities (PCCs) have been widely used to study the strong coupling and ultrastrong coupling (USC) of matter with high Q-factor cavity photons. Three-dimensional (3D) PCCs can possess several unique features as compared to 1D PCCs, such as the existence of: (i) a complete photonic band gap, and (ii) multiple cavity modes within a narrow frequency range in the band gap. However, a 3D-PCC coupled system operating beyond the weak coupling regime has never been reported due to challenges in fabrication. Here we have fabricated a terahertz 3D-PCC through deep reactive ion etching and studied Landau polariton dispersions reflecting the complex interactions between multiple cavity modes in the 3D-PCC and the cyclotron resonance of a high-mobility two-dimensional electron gas. Our data showed good agreement with calculations based on a microscopic model that takes into account multiple cavity modes. We show that the observed Landau polariton branches can be well understood in terms of photonic modes that are either decoupled or coupled together via inter-Landau-level excitations, depending on the polarization of the probe. Our findings highlight features that are unique to 3D-PCC and will enable further explorations of the USC regime in novel geometries where multiple photonic modes in a narrow frequency range contribute to the light-matter coupling. |
Tuesday, March 7, 2023 5:48PM - 6:00PM |
K40.00013: Plasmonic origami: tuning optical properties by periodic folding of plasmonic substrate: Gold's and graphene's cases Rémi VINCENT Surface plasmon polaritons (SPPs) have attracted great interest over the past decades, more recently graphene plasmon polaritons (GPPs) have renewed this interest owing to its electrical and optical properties, such as electrically tunable property, extreme confinement, ultrabroad tuning spectrum, and low intrinsic loss. While many have focused on the planar structure of graphene, in this work we introduce a novel plasmonic metasurface based on the periodic folding of polaritonic material considered as 2D. In this work the case of a gold nano-layer is also presented. The fabrication procedure can be broken down into two main parts: first, the fabrication of a W- shaped silicon (Si) matrix, and second, the use of this matrix to mold a gold film or to deform a monolayer graphene by transfer. As a result, tailored periodic is widely implemented to produce localized surface plasmon resonances (LSPRs). We found that the proposed structures exhibits strong and tunable resonances in broad spectral range, and that the folding angle play a critical role. |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700