Article
Nanoscience & Nanotechnology
Philipp Grimm, Gary Razinskas, Jer-Shing Huang, Bert Hecht
Summary: The study demonstrates that a generalized version of coherent perfect absorption (gCPA) can be applied to nanoresonators with radiative losses, offering the possibility of achieving perfect impedance matching between different components in plasmonic systems.
Article
Physics, Applied
Sara Ghayeb Zamharir, Rouhollah Karimzadeh, Xin Luo
Summary: The paper proposes a new perfect absorber design based on the CPA phenomenon of two-dimensional MoS2 monolayer in the visible region, demonstrating tunability of CPA resonant wavelength. This design provides a solution to enhance light absorption of MoS2 monolayer for optoelectronics applications in the visible region.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Optics
Myunghwan Kim, Sangin Kim, Soeun Kim
Summary: A new type of mid-infrared ultra-compact optical modulator composed of a graphene metasurface is proposed in this study. Unlike previous schemes, this modulator utilizes the topological characteristic of the isofrequency contour in the hyperbolic metasurface to modulate transmission, providing a modulation depth of 10.7 dB with a length of 750 nm, which is approximately 1/30 of an operating wavelength.
Article
Multidisciplinary Sciences
Yevgeny Slobodkin, Gil Weinberg, Helmut Hoerner, Kevin Pichler, Stefan Rotter, Ori Katz
Summary: One of the key insights of non-Hermitian photonics is the concept of coherent perfect absorber (CPA), which can be achieved by reversing the operation of well-established concepts like lasers. This study demonstrates the possibility of overcoming the limitation of CPA by time-reversing a degenerate cavity laser based on a unique cavity that self-images any incident light field onto itself. The results show that placing a weak, critically coupled absorber into this cavity allows for nearly perfect absorption of any incoming wavefront, even complex and dynamically varying speckle patterns. This opens up new possibilities for applications in light harvesting, energy delivery, light control, and imaging.
Article
Optics
Devashish Pandey, Sanshui Xiao, Martijn Wubs
Summary: This study investigates the sensitivity of the optical absorption of multilayer graphene structure to subnanometer interlayer separation. The results show that neglecting the interlayer separation leads to upper bounds on the absorption, while finite interlayer separations greatly affect the absorption. A closed-form analytical expression for the absorption is derived for an infinite number of graphene layers. The findings highlight the importance of considering subnanometer interlayer separations for accurate modeling and prediction of the optical properties of multilayer Van der Waals crystals suitable for coherent perfect absorption.
Article
Chemistry, Multidisciplinary
Daniel E. Gomez, Xu Shi, Tomoya Oshikiri, Ann Roberts, Hiroaki Misawa
Summary: We experimentally demonstrate and theoretically study the formation of coherent plasmon-exciton states, which exhibit high absorption of incident light and cancellation of absorption. Our research shows the potential implications of these coherent states and opens the prospect for devices exploiting coherent effects in applications.
Article
Chemistry, Multidisciplinary
Mao Wang, Ye Yu, Slawomir Prucnal, Yonder Berencen, Mohd Saif Shaikh, Lars Rebohle, Muhammad Bilal Khan, Vitaly Zviagin, Rene Hubner, Alexej Pashkin, Artur Erbe, Yordan M. Georgiev, Marius Grundmann, Manfred Helm, Robert Kirchner, Shengqiang Zhou
Summary: The occurrence of mid-infrared localized surface plasmon resonances (LSPR) in thin Si films hyperdoped with tellurium (Te) is demonstrated in this study. By fabricating two-dimensional arrays of micrometer-sized antennas in a Te-hyperdoped Si chip, the mid-infrared LSPR can be further enhanced and extended to the far-infrared range. This finding opens up the possibility of integrating plasmonic sensors with the on-chip CMOS platform, greatly advancing the mass manufacturing potential of high-performance plasmonic sensing systems.
Article
Multidisciplinary Sciences
Thomas Simon, Xiaoyan Li, Jerome Martin, Dmitry Khlopin, Odile Stephan, Mathieu Kociak, Davy Gerard
Summary: This article introduces the use of aluminum self-similar structures as broadband optical antennas and experimentally demonstrates that these structures can support multiple resonances that can be scaled over a broad spectral range. Such multiresonant structures are highly valuable for applications in nonlinear optics, light harvesting and photodetection, as well as surface-enhanced infrared absorption spectroscopy.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Nanoscience & Nanotechnology
Jeng Yi Lee, Pai-Yen Chen
Summary: With consideration of PT symmetry, Lorentz reciprocity theorem, and real Bloch phase, this work proposes a generalized parametric space to comprehensively illustrate the PT phase transition, Bloch phase, and necessary conditions of exotic wave scattering in finite periodic PT photonic structures. Parametrization is used to derive analytical formulas for the complex relative permittivities of the unit cells composed of subwavelength gain-loss heterostructures, providing a guideline for manipulating different PT scattering events. Several one-dimensional PT photonic systems are studied to achieve exotic wave scattering enabled by PT symmetry. This work offers a theoretical underpinning for studying extraordinary wave phenomena in PT-symmetric photonics and opens avenues for manipulation of light.
Article
Physics, Multidisciplinary
Wancong Li, Qiang Zhou, Pu Zhang, Xue-Wen Chen
Summary: This study proposes the concept of nanoscopic electron reservoir (NER) for direct electro plasmonic and electro-optic modulation. By exploiting the nonclassical effects of conduction electrons, highly electrically susceptible NERs are constructed and achieve pronounced direct electrical tuning of the plasmon mode. Moreover, the electro-plasmonic tuning can be efficiently translated into modulation of optical scattering.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Panpan Gao, Jianfeng Sun, Wenxuan Li, Chenxi Su, Zhuoyue Sun, Feng Xia, Kun Zhang, Lifeng Dong, Maojin Yun
Summary: We propose a temperature-tunable and dual-broadband switchable coherent perfect absorber (CPA) composed of an annulus-disk-shaped InSb pattern and a complementary graphene layer. By controlling the Fermi level of graphene, the temperature of InSb, or the relative phase of incident beams, the working frequency and absorption of the CPA can be continuously adjusted. The designed CPA exhibits broadband absorptance of over 90% in the frequency range of 0.145 THz to 1.24 THz, and can be thermally tuned in the THz region. Additionally, the absorptivity can be continuously varied between less than 1.2% and more than 90% in the dual-band and broadband modes by altering the relative phase of input beams.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Agostino Di Francescantonio, Andrea Locatelli, Xiaofei Wu, Attilio Zilli, Thorsten Feichtner, Paolo Biagioni, Lamberto Duo, Davide Rocco, Costantino De Angelis, Michele Celebrano, Bert Hecht, Marco Finazzi
Summary: The control of nonlinear optical signals in nanostructured systems is achieved by exploiting coherent interactions between different nonlinear optical processes. In this study, plasmonic nanostructures are utilized to provide strong field enhancement and high optical nonlinearity. By combining two beams, one at a telecom wavelength and the other at twice the frequency, a nonlinear signal is generated from single asymmetric gold nanoantennas. The modulation and manipulation of this nonlinear signal is demonstrated through interference with the third-harmonic radiation, offering a promising route for all-optical logic operations at the nanoscale.
ADVANCED OPTICAL MATERIALS
(2022)
Review
Nanoscience & Nanotechnology
Yu Yao, Jin Zhou, Zhengqi Liu, Xiaoshan Liu, Guolan Fu, Guiqiang Liu
Summary: Metamaterial light absorbers have gained significant attention for their absorption efficiency and wide range of applications, but traditional noble metals based absorbers can suffer from structural damage due to local high temperatures. Intensive research has focused on developing absorbers that can maintain efficient light absorption and structural stability at high temperatures. Refractory materials are seen as key to providing robust thermal stability and high performance for light absorption.
Article
Materials Science, Multidisciplinary
Liang Xu, Jian Zeng, Xin Luo, Libin Xia, Zongle Ma, Bojun Peng, Zhengquan Li, Xiang Zhai, Lingling Wang
Summary: A dual-band perfect absorber based on (CH3NH3)PbI3 is designed to significantly enhance its absorption capability by exciting localized plasmon and surface plasmon modes. The absorber forms dual-band perfect absorption peaks in the communication regime, with the absorption of (CH3NH3)PbI3 layer increased to 43.1% and 64.2% at the dual-band absorption peaks. The physical mechanism in this absorber can also be utilized to strengthen the absorption of other halide perovskites, maintaining good performance under wide angles of incidence and different polarization states.
Article
Nanoscience & Nanotechnology
Farshid Ashtiani, Firooz Aflatouni
Summary: A novel multilayer 2-D optical phased array technology is introduced in this study, achieving a record element-pitch and a wide steering range through special designs.
Article
Optics
Yangbo Wu, Zhibo Qu, Ahmed Osman, Chen Wei, Wei Cao, Antulio Tarazona, Swe Zin Oo, Harold M. H. Chong, Otto L. Muskens, Goran Z. Mashanovich, Milos Nedeljkovic
Summary: A waveguide-based bolometer operating in the 3.72-3.88 micrometer wavelength range has been developed, with significant improvements in responsivity compared to previous silicon-on-insulator bolometers. Potential for further improvement in thermal conductance through device redesign is suggested.
Article
Nanoscience & Nanotechnology
Nicholas J. Dinsdale, Peter R. Wiecha, Matthew Delaney, Jamie Reynolds, Martin Ebert, Ioannis Zeimpekis, David J. Thomson, Graham T. Reed, Philippe Lalanne, Kevin Vynck, Otto L. Muskens
Summary: Recent breakthroughs in photonics have highlighted the need for new schemes for fully programmable nanophotonic devices. Although universal optical elements based on interferometer meshes underpin many new technologies, their large footprint restricts scalability. A proposed ultracompact platform using the complex transmission matrix of multiport multimode waveguides and deep learning inverse network approach allows control over both intensity and phase in multiport devices with a significantly reduced footprint compared to traditional technologies.
Article
Multidisciplinary Sciences
Matthew Delaney, Ioannis Zeimpekis, Han Du, Xingzhao Yan, Mehdi Banakar, David J. Thomson, Daniel W. Hewak, Otto L. Muskens
Summary: The study demonstrates the potential of the previously unexplored material Sb2Se3 in silicon photonics, showing its ability to achieve over 10 pi radians of optical phase control and full control over the flow of light through nanophotonic digital patterning.
Article
Chemistry, Analytical
Xingshi Yu, Xia Chen, Milan M. Milosevic, Weihong Shen, Rob Topley, Bigeng Chen, Xingzhao Yan, Wei Cao, David J. Thomson, Shinichi Saito, Anna C. Peacock, Otto L. Muskens, Graham T. Reed
Summary: GER amplifier and annealing process can change the optical properties of silicon, enabling flexible testing and post-fabrication trimming of silicon photonics devices, reducing production costs and increasing yield.
Article
Nanoscience & Nanotechnology
Clement Majorel, Christian Girard, Arnaud Arbouet, Otto L. Muskens, Peter R. Wiecha
Summary: Optical interactions are crucial for the optical response of nanostructures, especially in complex environments. This study proposes a method based on deep convolutional neural networks to describe aperiodic assemblies of plasmonic nanostructures, providing high accuracy and spectral resolution of coupling effects. This method is of great interest in the field of metasurfaces and has significant advantages in applications where optical interactions play a crucial role.
Article
Nanoscience & Nanotechnology
Peng Dai, Kai Sun, Xingzhao Yan, Otto L. Muskens, C. H. (Kees) de Groot, Xupeng Zhu, Yueqiang Hu, Huigao Duan, Ruomeng Huang
Summary: The study solved the one-to-many problem by employing a conditional generative adversarial network to generate multiple solution groups, allowing for the selection of the best design for each color and achieving a high level of accuracy.
Article
Nanoscience & Nanotechnology
Kai Sun, Wei Xiao, Callum Wheeler, Mirko Simeoni, Alessandro Urbani, Matteo Gaspari, Sandro Mengali, C. H. (Kees) de Groot, Otto L. Muskens
Summary: This study demonstrates a visually transparent, smart radiator panel with reduced solar absorption using high-quality VO2 thin films and plasmonic enhancement effects. It offers a new approach for thermal management in applications requiring visual transparency.
Review
Chemistry, Multidisciplinary
Atiqah Nabieha Azmi, Wan Zakiah Wan Ismail, Haslan Abu Hassan, Mohd Mahadi Halim, Norzaini Zainal, Otto L. Muskens, Wan Maryam Wan Ahmad Kamil
Summary: This review explores the concept of using open cavity lasing for ultrasensitive sensing, particularly in driving important innovations in laser-based biosensors. Laser-based sensing offers higher signal amplification and lower signal-to-noise ratio compared to fluorescence-based sensing, as well as high sensitivity due to nonlinear components. The versatility of open cavity random lasers allows for direct detection of small changes in chemical composition and temperature fluctuations.
Article
Materials Science, Multidisciplinary
Peng Dai, Kai Sun, Otto L. Muskens, C. H. de Groot, Ruomeng Huang
Summary: Dynamic structural color provides a time dimension to enhance information load and functionality. This study presents the inverse design of a dynamic structural color asymmetric Fabry-Perot cavity using parameter-based conditional generative adversarial networks. The designed structure achieves a large gamut and color coverage variation through the phase change of a VO2 layer.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Kai Sun, Evangelos Vassos, Xingzhao Yan, Callum Wheeler, James Churm, Peter R. Wiecha, Simon A. Gregory, Alex Feresidis, Cornelis H. de Groot, Otto L. Muskens
Summary: This study demonstrates a large-scale aluminum zinc oxide metasurface coating based on deep-UV lithography, which can achieve a wide range of dual-band reflectivity values and brings commercially relevant and scalable technology closer to infrared metasurface coatings.
ADVANCED OPTICAL MATERIALS
(2022)
Editorial Material
Materials Science, Multidisciplinary
N. Kinsey, R. Grange, B. Mendez, K. Sun, O. L. Muskens
Summary: This is an introduction to the feature issue of Optical Materials Express on Oxide Materials for Emerging Applications in Photonics.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Kai Sun, Callum Wheeler, James A. Hillier, Sheng Ye, Ioannis Zeimpekis, Alessandro Urbani, Nikolaos Kalfagiannis, Otto L. Muskens, Cornelis H. (Kees) de Groot
Summary: The unique structural transition of VO2 between dielectric and metallic phases has significant potential in optical and electrical applications. This study presents a W:VO2 process based on atomic layer deposition (ALD) that enables precise control of W-doping and reduction of the phase transition temperature. The incorporation of W through ALD growth results in a state-of-the-art phase transition temperature and high emissivity contrast, making it suitable for the design of smart and switchable devices.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Environmental Sciences
Mohamed E. Zayed, Abdallah Kamal, Mohamed Ragab Diab, Fadl A. Essa, Otto L. Muskens, Manabu Fujii, Ammar H. Elsheikh
Summary: Increasing the evaporation zone and performance of a double-slope solar distiller (DSSD) was achieved through the utilization of a prismatic absorber basin covered by linen wicks and dual parallel spraying nozzles underneath the glass cover. The modified DSSD showed higher cumulative distillation yield, energy efficiency, exergy efficiency, and cost per liter of distilled yield compared to the traditional double slope solar distiller (TDSSD). The results demonstrated the effectiveness and economic benefits of the modifications made to the DSSD-WPB&DPSN.
Proceedings Paper
Engineering, Electrical & Electronic
Kaveh Delfanazari, Otto L. Muskens
Summary: We present novel chip-integrated tunable optical modulators operating in visible to near-infrared telecommunication bands. These devices are based on plasmonic nano-antenna and nano-circuit metasurface arrays fabricated on niobium (Nb) thin metallic films. We demonstrate high modulation depth of 60% at wavelength λ = 716 nm and maximum extinction of 95% at wavelength λ = 650 nm for our nano-antenna based modulators. Similarly, our near-infrared nano-circuit array-based modulators achieve a maximum extinction of 88% at wavelength λ = 1380 nm. The polarization-sensitive optical modulators can be controlled by altering the geometrical parameters of their subwavelength elements and unit cells.
2022 PHOTONICS & ELECTROMAGNETICS RESEARCH SYMPOSIUM (PIERS 2022)
(2022)
Article
Chemistry, Multidisciplinary
Konstantina Alexaki, Maria Eleni Kyriazi, Joshua Greening, Lapatrada Taemaitree, Afaf H. El-Sagheer, Tom Brown, Xunli Zhang, Otto L. Muskens, Antonios G. Kanaras
Summary: In this study, we successfully demonstrated the rapid and accurate detection of SARS-CoV-2 infection without the need for PCR amplification using UCNPs and GO.