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Nader Engheta

Nader Engheta is an Iranian-American applied physicist and electrical engineer renowned for his pioneering contributions to metamaterials, nanophotonics, and the manipulation of electromagnetic waves at the nanoscale. Born in Tehran, Iran, he earned his B.S. in electrical engineering from the University of Tehran, graduating at the top of his class, before emigrating to the United States in 1978 to pursue graduate studies at the California Institute of Technology (Caltech), where he received his M.S. and Ph.D. in electrical engineering and physics by 1982. Engheta joined the faculty of the in 1987, where he currently holds the H. Nedwill Ramsey Professorship and maintains joint appointments in the Departments of Electrical and , and Engineering, Physics and Astronomy, and Bioengineering. His research focuses on innovative concepts such as metamaterials—artificial structures engineered to exhibit electromagnetic properties not found in natural materials—including near-zero-index , plasmonic cloaking, and optical metatronics, which enable nanoscale circuitry using light as an information carrier. These advancements have profound implications for fields like ultrafast , advanced , sensing technologies inspired by animal , and applications in and communications. Engheta holds over 25 patents and has authored seminal works on wave propagation in chiral media and omega media, laying foundational groundwork for modern metamaterial design since the 1980s. Among his numerous accolades, Engheta received the Benjamin Franklin Medal in Electrical Engineering from The Franklin Institute in 2023 for transformative innovations in materials that control electromagnetic waves, enhancing computing and communication technologies. He was awarded the Max Born Award from Optica in 2020 and the Isaac Newton Medal and Prize from the Institute of Physics (UK) in the same year, recognizing his leadership in photonics and metamaterials. In 2024, he was elected to Academia Europaea and received the Chen-To Tai Distinguished Educator Award from the IEEE Antennas and Propagation Society. In 2025, he received the Rolf Landauer Medal from the ETOPIM Association. Engheta is a member of the American Academy of Arts and Sciences and several other prestigious bodies, including as a Fellow of IEEE, Optica, the American Physical Society, and the American Association for the Advancement of Science; he has also received honorary doctorates from institutions such as Aalto University, the University of Stuttgart, and the National Technical University's Kharkov Polytechnic Institute.

Early Life and Education

Early Life

Nader Engheta was born in 1955 in , . He grew up in a secular of Iranian , with both parents also born in , and was the youngest of seven siblings, including four brothers and two sisters. His early childhood was spent in the Chaharrah Aziz Khan neighborhood (later known as Hafez Street), before the family moved at age six to an area near the . From a young age, Engheta displayed a keen fascination with , particularly after encountering a that ignited his curiosity about invisible electromagnetic waves and signals. This interest deepened during high school, where he was inspired by his brother's tinkering with radios, prompting him to explore how everyday devices functioned through principles of electromagnetics and engineering. Engheta's childhood exposure to physics and occurred primarily through Tehran's system, which emphasized a rigorous curriculum in the s. He attended a local for six years, followed by a well-regarded high for another six, where after ninth grade he selected the "" oriented toward and studies. This formative educational environment in shaped his early inclinations toward technical fields.

Education

Nader Engheta received his B.S. degree in from the in June 1978. He graduated ranked first in his class. He continued his studies at the (Caltech), earning an M.S. in in June 1979 and a Ph.D. in and Physics in June 1982. For his doctoral dissertation, titled On the Radiation Patterns of Interfacial Antennas, Engheta worked under the supervision of Charles H. Papas, exploring key aspects of electromagnetics relevant to antenna radiation at interfaces. Following completion of his Ph.D., Engheta served as a Postdoctoral Research Fellow at Caltech from June 1982 to June 1983, conducting research in electromagnetics.

Academic Career

Early Career

After completing his Ph.D. at the in 1982, with a dissertation focused on interfacial antennas, Nader Engheta served as a postdoctoral research fellow at Caltech from 1982 to 1983. He then transitioned to industry, working as a senior research scientist at Kaman Sciences Corporation's Dikewood Division in , from 1983 to 1987, where he conducted research on electromagnetics applications. In July 1987, Engheta joined the as an assistant professor in the Department of . He was promoted to with tenure in 1990 and to full professor in 1995, establishing his primary academic affiliation at the institution. During this early academic period, Engheta's research centered on electromagnetics and wave propagation, exploring interactions between electromagnetic waves and materials, which laid the groundwork for his later contributions in and .

Positions at University of Pennsylvania

Since 2005, he has served as the H. Nedwill Ramsey Professor in the Department of Electrical and Systems Engineering. His primary appointment remains in this department, where he has advanced through various leadership roles, including chairing the graduate group in electrical engineering from 1993 to 1997. Engheta holds secondary appointments in the Department of Bioengineering (since 2005), the Department of Materials Science and Engineering (since 2013), and the Department of Physics and Astronomy (since 2012), reflecting his interdisciplinary contributions across engineering and physical sciences. These affiliations enable collaborative research initiatives spanning multiple fields at the university. As director of the Metamaterials and Nanoscale Optics Lab—housed within the Engheta Group at —Engheta oversees a research team focused on wave physics and nanoscale phenomena. He has been recognized for his inventive work, holding over 25 U.S. patents related to and electromagnetic technologies, and was elected a of the U.S. of Inventors in 2015.

Research Contributions

Metamaterials and Transformation Optics

Nader Engheta's early contributions to in the early 2000s focused on leveraging double-negative materials to achieve , enabling the bending of electromagnetic waves in unconventional directions. In collaboration with Andrea Alù, Engheta explored how such materials could support subwavelength imaging by amplifying evanescent waves, providing physical insights into the mechanisms behind perfect lensing proposed by Pendry. Their work emphasized the circuit equivalence of slabs to explain the "growing" evanescent fields necessary for resolving features smaller than the limit, laying groundwork for applications in high-resolution . Building on these foundations, Engheta advanced the transformation framework, particularly through plasmonic implementations for invisibility . In a seminal 2005 study, he and Alù demonstrated how coordinate transformations could be approximated using plasmonic coatings with negative to cancel from arbitrary objects, effectively rendering them transparent to impinging waves without the need for full anisotropic shells. This approach, detailed in their analysis of plasmonic and coatings, extended the formal invariance of under coordinate mappings to practical designs, influencing subsequent strategies. A follow-up 2006 edited volume further synthesized these ideas, highlighting transformation as a for manipulating paths in engineered media. A cornerstone of Engheta's research is the concept of epsilon-near-zero (ENZ) materials, where the real part of the approaches zero (ε ≈ 0), enabling enhanced light-matter interactions and wave tunneling through subwavelength apertures. In ENZ regimes, the diverges, allowing electromagnetic waves to propagate with nearly uniform phase across thin slabs, which facilitates efficient tunneling of through narrow channels or bends that would otherwise be evanescent. Mathematically, this is captured by the condition where the effective satisfies \epsilon_r \approx 0, leading to a polaritonic resonance that matches the wavevector β to the slab's propagation constant, thereby squeezing and transmitting fields with minimal loss. Engheta's theoretical models showed how ENZ structures could tailor radiation patterns from sources embedded within them, enhancing directivity and impedance matching for nanophotonic devices. Experimental demonstrations of Engheta's cloaking concepts using plasmonic nanostructures validated these theories at microwave frequencies. In 2009, Engheta and collaborators reported the first verification of plasmonic cloaking, employing metamaterial coatings to reduce the scattering width of a dielectric cylinder by more than 18 dB, effectively hiding it from incident waves. These nanostructures, fabricated with subwavelength periodic elements exhibiting negative effective permittivity, confirmed the robustness of the transformation-based design against variations in object size and background media. Such proofs-of-principle paved the way for scaling to optical wavelengths, though challenges in loss and dispersion persist.

Plasmonic Optics and Nanophotonics

Nader Engheta's contributions to plasmonic optics and have centered on harnessing surface plasmons to manipulate at subwavelength scales, enabling enhanced light-matter interactions for applications in sensing and . In the early , he pioneered the design of optical nanoantennas, which function as nanoscale analogs to classical radio-frequency antennas but operate with visible and through plasmonic resonances. These structures, such as Yagi-Uda nanoantennas, concentrate electromagnetic fields to boost harvesting efficiency and sensitivity in detection schemes, achieving exceeding those of traditional dipoles by factors of up to 100 while maintaining subwavelength footprints. For instance, plasmonic nanoantennas loaded with metamaterials were shown to enhance directivity for sensing, allowing efficient coupling of far-field radiation to localized near-field hotspots for molecular detection. A significant advancement in Engheta's work involves , where the material's tunable enables dynamically reconfigurable plasmonic devices. supports highly confined surface plasmon polaritons (SPPs) in the and regimes, with propagation lengths tunable via electrostatic gating. The intraband of , approximated by the Drude-like model \sigma = i \frac{e^2 k_B T}{\pi \hbar^2 (\omega + i/\tau)} for low frequencies where thermal excitations dominate, allows for precise control of plasmon wavelength and damping. Engheta demonstrated that patterned sheets can realize optical devices, such as lenses and cloaks, by modulating to steer SPPs with subwavelength resolution, paving the way for compact, tunable nanophotonic components. Engheta's research on hybrid plasmonic systems integrates with dielectric or polar substrates to mitigate losses and extend for biosensing and . In graphene-silicon carbide multilayers, -plasmon emerge, combining the tunability of graphene plasmons with low-loss phonon modes to achieve distances over 100 times longer than pure graphene at mid-infrared wavelengths. These structures enhance sensitivity in biosensors by amplifying evanescent fields near interfaces, enabling detection of biomolecular binding with shifts as small as $10^{-6}. For , designs facilitate nonreciprocal , such as electrically induced one-way in -based waveguides, which supports isolation and routing in nanoscale logic elements without magnetic biasing. In near-field optics, Engheta introduced concepts for surpassing the diffraction limit through plasmonic amplification of evanescent waves. His optical hyperlens, a cylindrical stack with alternating plasmonic (negative ) and layers, radially compresses subwavelength features into the far field, achieving magnifications up to 4× for objects smaller than \lambda/10. This enables nanoscale imaging, as simulated for visible wavelengths with resolutions below 100 . Complementary work on far-field superlenses using plasmonic crystals further refines this by restoring evanescent components via resonant excitation, supporting applications in high-resolution scanning beyond conventional limits.

Optical Nanocircuits and Metatronics

Nader Engheta introduced the paradigm of optical nanocircuits by analogizing nanoscale optical structures to traditional lumped circuit elements, enabling the design of functional optical components at subwavelength scales. This approach leverages plasmonic and nanoparticles to mimic inductors, capacitors, and resistors, allowing light to propagate and interact in ways reminiscent of electrical signals in s. The framework provides a circuit-theory-based analysis for complex electromagnetic interactions at optical frequencies, where wave effects are typically dominant. In 2012, Engheta coined the term "metatronics" to describe this metamaterial-inspired optical nanocircuitry, drawing parallels between radio-frequency and nanoscale . Optical inductors are designed using loop geometries of plasmonic materials, with effective approximated as L_{\text{opt}} = \mu h / w, where \mu is the permeability, h the height, and w the width of the structure. Capacitors employ parallel-plate configurations of or plasmonic nanoparticles, yielding C_{\text{opt}} = \varepsilon A / d, with \varepsilon the , A the area, and d the separation. Resistors are realized through lossy plasmonic nanoparticles that introduce controlled dissipation, analogous to ohmic resistance in . These elements are interconnected via near-field coupling to form networks without radiative losses. Experimental verification of these lumped nanocircuit elements was achieved in 2012 using mid-infrared wavelengths on nanorod arrays fabricated via . Configurations such as series and parallel circuits demonstrated behaviors matching theoretical predictions, with quality factors up to 20 and tunability via structural dimensions. Impedance matching at optical frequencies was confirmed through , showing effective control of optical "" and "voltage" amplitudes and phases, thus validating the circuit for non-radiating, subwavelength operation. This metatronics paradigm extends to applications in nanoscale and computing, where optical nanocircuits enable compact filters, oscillators, and logic gates powered by light. By integrating multiple elements, complex operations like and become feasible at speeds, potentially revolutionizing on-chip for ultra-fast data handling in integrated systems.

Awards and Honors

Major Scientific Awards

Nader Engheta has received several prestigious awards recognizing his groundbreaking contributions to electromagnetics, , and . These honors highlight his pioneering work in metamaterials, , and related fields, underscoring their transformative impact on and wave manipulation at the nanoscale. In 2012, Engheta was awarded the IEEE Electromagnetics Award for his pioneering contributions to electromagnetic theory and the applications of metamaterials and nanoscale . This accolade, one of the IEEE's Technical Field Awards, celebrates his foundational role in advancing how electromagnetic waves interact with engineered structures, enabling novel functionalities in and beyond. The SPIE Gold Medal, bestowed upon Engheta in 2015, honors his transformative and groundbreaking contributions to the of metamaterials. As the highest award from the International Society for Optics and Photonics (), it recognizes his innovations in designing materials that exhibit unprecedented control over light propagation, influencing fields from to biomedical imaging. Engheta received the Max Born Award from Optica in 2020 for his exceptional advancements in optical metamaterials, transformation , and . Named after physicist , this prestigious prize acknowledges his theoretical and experimental work that has redefined how light can be manipulated at subwavelength scales, paving the way for next-generation optical devices. In 2020, Engheta was awarded the Medal and Prize by the Institute of Physics () for groundbreaking innovation and transformative contributions to structure, theory, and design of metamaterials and . This medal recognizes his leadership in the field and includes a £1,000 prize and an invitation to deliver a lecture at the Institute. In 2023, he was presented with the Medal in by The for his transformative innovations in engineering novel materials to control and manipulate at the nanoscale, including developments in optical metatronics and invisibility cloaking. This medal, one of the oldest scientific awards in the United States, emphasizes the practical and theoretical impact of his research on technologies and integrated . Most recently, in 2025, Engheta earned the Medal from the ETOPIM Association for his seminal contributions to the elastic, electrical, transport, and of inhomogeneous . This award, given biennially, salutes his deep insights into wave phenomena in complex , which have broad implications for design and electromagnetic modeling.

Fellowships and Academy Elections

In 2023, Nader Engheta was elected to the American Academy of Arts and Sciences, recognizing his distinguished contributions to the fields of and physics. This honor places him among leading scholars and practitioners advancing innovative research and broader societal impact. Engheta's election to in 2024 further underscores his international stature in physics, particularly in electromagnetics and . As a member of this prestigious pan-European academy, he joins eminent scientists elected for their scholarly excellence and potential to foster cross-disciplinary collaboration. Engheta received the in 1999 from the John Simon Guggenheim Memorial Foundation, supporting his pioneering research in electromagnetics. This fellowship enabled foundational work on advanced paradigms in classical electrodynamics, highlighting his early influence in the field. He has been recognized as a Fellow of several leading professional societies for his sustained contributions to science and engineering. Engheta was elected a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 1996, Optica (formerly the Optical Society of America) in 1999, the American Physical Society (APS) in 2008, and SPIE (the International Society for Optics and Photonics) in 2011. These fellowships affirm his leadership in photonics, metamaterials, and related disciplines. In 2024, Engheta was awarded the Chen-To Tai Distinguished Educator Award by the IEEE Antennas and Propagation Society (AP-S), honoring his lifelong dedication to electromagnetic and mentoring. This accolade celebrates his innovative methods and guidance of emerging researchers in .

Publications

Edited Books

Nader Engheta has made significant contributions to of metamaterials through his editorial work on key volumes that compile foundational and advanced research. In 2006, Engheta co-edited Metamaterials: Physics and Engineering Explorations with Richard W. Ziolkowski, published by Wiley-IEEE Press. This 414-page volume features 14 chapters organized into two main parts, each with two sections, exploring the physics, design principles, and engineering applications of electromagnetic metamaterials, including topics such as , subwavelength imaging, and devices. More recently, in 2024, Engheta co-edited Metamaterials-by-Design: Theory, Technologies, and Vision with Andrea Alù, Andrea Massa, and Giacomo Oliveri, published by as part of the SPIE Press Book Series on Photonic Materials and Applications. This 388-page book comprises 11 chapters across three parts, focusing on inverse design methodologies, computational tools, and future visions for metamaterials in and beyond, emphasizing practical implementation and innovative synthesis techniques. These edited volumes have served as seminal references, shaping research trajectories in and by integrating diverse expert perspectives.

Selected Journal Articles

Nader Engheta has authored or co-authored over 600 peer-reviewed articles as of 2025, achieving an h-index greater than 100 based on more than 61,000 citations. A seminal contribution is the 2007 paper "Circuits with Light at Nanoscales: Optical Nanocircuits Inspired by Metamaterials" published in Science, which proposed using subwavelength plasmonic or elements as lumped circuit components for nanoscale optical circuitry. In 2010, Engheta co-authored "Wireless at the Nanoscale: Optical Interconnects using Matched Nanoantennas" in , demonstrating a mechanism for optical links at the nanoscale using matched nanoantennas loaded with optical nanocircuits. The 2012 paper "Nonlocal Transformation Optics" published in introduced a framework for nonlocal , enabling the design of metamaterials with spatially dispersive responses to achieve advanced wave manipulation without singularities. A key 2024 publication, "Nonreciprocal Response of Electrically Biased -Coated ," explores ENZ-enhanced devices for nonreciprocal light-matter interactions in .

References

  1. [1]
    About - Engheta Group
    Nader Engheta is the H. Nedwill Ramsey Professor at the University of Pennsylvania in Philadelphia, with affiliation in the Departments of Electrical and ...Missing: biography | Show results with:biography<|control11|><|separator|>
  2. [2]
    Nader Engheta - Optica
    Nov 8, 2021 · Nader Engheta is the H. Nedwill Ramsey Professor at the University of Pennsylvania, USA. He received his BS degree from the University of ...
  3. [3]
    Nader Engheta | The Franklin Institute
    Born in Tehran, Nader Engheta completed his undergraduate work in Iran before moving to the United States to earn his graduate degrees at Caltech. He worked as ...Missing: biography | Show results with:biography
  4. [4]
    Nader Engheta - Engineering and Technology History Wiki
    Biography. One of the top 50 leaders in science and technology according to Scientific American magazine, Nader Engheta's pioneering work has profoundly ...
  5. [5]
    Nader Engheta - Caltech Heritage Project
    I was born in Tehran, and I grew up there—I was born and raised there. I went to elementary school, high school, and undergraduate college, University of Tehran ...
  6. [6]
    Academy of Europe: CV
    ### Education Summary for Nader Engheta
  7. [7]
    Academic Lineage of LWE - EPFL
    Ph.D., California Institute of Technology, 1982. Dissertation: On the Radiation Patterns of Interfacial Antennas Supervisor: Charles H. Papas ...
  8. [8]
    Nader Engheta (PhD '82), Physicist, Electrical Engineer, and ...
    Oct 16, 2023 · After growing up in Tehran and excelling in engineering and physics at the University of Tehran, Engheta left for Pasadena in 1978, one year ...
  9. [9]
    An Interview with Nader Engheta | ACS Photonics - ACS Publications
    Sep 18, 2024 · When I joined Caltech as a graduate student, my advisor was Professor Charles Papas, who was a renowned scientist in electromagnetic theory.Missing: thesis title
  10. [10]
    Engheta Nader - Academy of Europe
    Apr 20, 2024 · 1993 - 1997 EE Graduate Group Chair, University of Pennsylvania; 1987 - 1990 Assistant Professor, Dept. Electrical Engineering, University of ...Missing: early career
  11. [11]
    Nader Engheta - Penn Engineering Faculty Directory
    Nader Engheta, H. Nedwill Ramsey Professor, Bioengineering, Electrical and Systems Engineering, Primary Materials Science and Engineering, Physics and ...Missing: promotion | Show results with:promotion
  12. [12]
    Nader Engheta | Department of Physics and Astronomy
    Nader Engheta is the H. Nedwill Ramsey Professor at the University of Pennsylvania in Philadelphia, with affiliation in the Departments of Electrical and ...
  13. [13]
    Nader Engheta, Ph.D. - The Advanced Science Research Center
    Nader Engheta is the H. Nedwill Ramsey Professor at the University of Pennsylvania. He received his B.S. degree from the University of Tehran, and his M.S and ...Missing: biography | Show results with:biography
  14. [14]
    Engheta Group – At the University of Pennsylvania
    Our group is interested in the science and technology of fields and waves. We are exploring a variety of research scenarios in wave-matter interaction.Missing: promotion | Show results with:promotion
  15. [15]
    Fellows - NAI - National Academy of Inventors
    Nader Engheta, University of Pennsylvania, 2015. E, Laura Ensign, Johns Hopkins University, 2019. E, Thomas Epps, University of Delaware, 2021. E, Ali Erdemir ...
  16. [16]
    Awards & Honors - Engheta Group - University of Pennsylvania
    Penn Today, a press release about Nader Engheta, titled “Penn scientist Nader Engheta wins the Benjamin Franklin Medal”
  17. [17]
    SPIE Gold Medal
    Jul 1, 2015 · SPIE Gold Medal recipient Nader Engheta is honored for transformative and groundbreaking contributions to optical engineering of ...
  18. [18]
    Nader Engheta | American Academy of Arts and Sciences
    Oct 27, 2025 · He received his BS degree from the University of Tehran, and his MS and Ph.D. degrees from Caltech. His current research activities span a broad ...Missing: biography | Show results with:biography
  19. [19]
    Meet our Fellows - Guggenheim Fellowship
    1999. René Davids. 1999. Fred T. Davies Jr. 1999. Dick Davis. 1999. Robert C ... Nader Engheta. 1999. Will Eno. 1999. Eve Ensler. 1999. Kathleen M. Erndl. 1999 ...
  20. [20]
    IEEE AP-S 2024 Award Recipients
    2024 Chen-To Tai Distinguished Educator Award. Dr. Nader Engheta “For lifelong dedication to electromagnetic education and mentoring and for pioneering and ...
  21. [21]
    Book Edited - Engheta Group
    The book on the subject of metamaterials, edited by N. Engheta and RW Ziolkowski, IEEE-Wiley, 2006. This book contains 14 chapters, divided into 2 parts, each ...
  22. [22]
    ‪Nader Engheta‬ - ‪Google Scholar‬
    Nader Engheta. H. Nedwill Ramsey Professor, University of Pennsylvania. Verified email at seas.upenn.edu - Homepage · OpticsElectrodynamics ...Missing: early career 1983