Article
Optics
Long Wen, Xianghong Nan, Jiaxiang Li, David R. S. Cumming, Xin Hu, Qin Chen
Summary: In this paper, a dual-ENZ mode scheme for spatial light modulation using TCOs/dielectric/silicon nanotrench configuration is proposed and demonstrated for the first time. The SIS junction can establish two distinct ENZ layers arising from the induced charge-carriers of opposite polarities adjacent to both faces of the dielectric layer. The non-resonant and low-loss deep nanotrench framework allows efficient modulation of free space light via interaction of dual ENZ modes in an elongated manner. Theoretical and experimental studies reveal that the dual ENZ mode scheme in the SIS configuration leverages large modulation depth, extended spectral bandwidth, and high speed switching, holding great promise for achieving electrically addressed spatial light modulation in near- to mid-infrared regions.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Chemistry, Physical
Qin Chen, Shichao Song, Huacun Wang, Li Liang, Yajin Dong, Long Wen
Summary: A dual-resonance light coupling scheme is proposed in this work to achieve an almost one order-of-magnitude improvement in modulation depth-bandwidth product. By optimizing the dual-resonance configuration, decent light modulation can be obtained within a large operation wavelength band covering two resonances.
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
Optics
Tanmay Bhowmik, Debabrata Sikdar
Summary: In this Letter, a grating-assisted dual-band metasurface for spatial light modulation is proposed, which can operate at specific wavelengths in the C-band and O-band. By leveraging the properties of the silicon-nitride nanograting and the silicon-indium-tin-oxide (ITO)-alumina-gold stack, the reflectance spectra can be modulated at 1.55 mu m and 1.31 mu m wavelengths. This metasurface may offer potential applications in the development of dual-band active nanophotonic devices.
Article
Optics
Yaping Hou, Lin Cheng, Zhengji Wen, Tianlun Li, Jianyong Mao, Yunfan Xu, Fu Liu, Jiaming Hao, Weitao Jiang, Yanpeng Zhang, Lei Zhang
Summary: A sandwich-type nonlinear nanoantenna with a thin layer of epsilon-near-zero (ENZ) material is proposed, which can dynamically tune the far-field scattering via an all-optical approach. By combining the dependence of four fundamental Mie modes on refractive index and intensity-dependent refractive index change caused by nonlinear optical effect in ENZ material, the far-field scattering can be controlled by controlling the intensity of incident light. The proposed all-optical nonlinear nanoantennas have promising applications in all-optical light modulation for photonic devices.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Hang Jiang, Yuanan Zhao, Hao Ma, Cao Feng, Yi Wu, Weili Zhang, Meiling Chen, Mengxia Wang, Yafei Lian, Zhaoliang Cao, Jianda Shao
Summary: A new design concept for broadband light absorption based on the coupling of epsilon-near-zero (ENZ) and localized surface plasmon resonance (LSPR) modes is proposed. Experimental results show that a single-layer patterned indium tin oxide (ITO) film on a two-dimensional microsphere array can achieve over 98% light absorption in a wide wavelength range. These findings provide a low-cost solution for designing broadband perfect absorbers based on ENZ materials, with potential applications in near-infrared sensors, photoelectric detection, and ENZ photonics.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Yang Zhang, Fu-Pei Wu, Hai-Feng Zhang
Summary: In this study, a theoretical model for refractive index detection based on coherent perfect absorption (CPA) mechanism and phase modulation is proposed. The method uses narrow frequency range phase modulation to measure refractive index with high precision and sensitivity. By exploiting the high sensitivity of the narrow absorption peak to changes in refractive index, accurate measurement and analysis of different refractive index substances are achieved. The proposed structure also includes a magnetic field calibration function and the sensing performance can be improved by adjusting the thicknesses of the dielectric layers and the incident angle.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Arash Nemati, Qian Wang, Norman Soo Seng Ang, Weide Wang, Minghui Hong, Jinghua Teng
Summary: The study utilizes the lossy nature of indium tin oxide (ITO) at epsilon-near-zero (ENZ) wavelength to design an electrically tunable metasurface absorber, achieving total absorption of reflected light through coupling of magnetic dipole resonance with ENZ wavelength. The metasurface can achieve high modulation depth at a specific bias voltage and is insensitive to incident light polarization due to its circular resonator design and symmetrical bias connections.
OPTO-ELECTRONIC ADVANCES
(2021)
Article
Materials Science, Multidisciplinary
Jacek Gosciniak
Summary: This study presents a novel waveguide-integrated bolometer that operates in a wide wavelength range. The bolometer uses transparent conductive oxides as the active material and can be easily integrated with passive on-chip components, demonstrating high responsivity.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Optics
A. Sadeghi, M. Ghanaatshoar
Summary: We propose a scheme to modulate light through coherent perfect activity. By irradiating two coherent beams from both sides to a magnetic material and controlling their relative phases, the output light can be manipulated. Large polarization rotation angles can be observed through coherent perfect polarization rotation process, enabling light modulation. This coherent process provides light modulation using a very low intensity coherent light.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Justus Bohn, Ting Shan Luk, Simon Horsley, Euan Hendry
Summary: When light travels through a medium with changing refractive index over time, it can lead to a frequency shift. Recent studies have shown significant frequency shifting effects in transparent conductive oxides, likely due to temporal changes in the refractive index. Experimental results indicate that the frequency shift in certain materials originates not only from bulk response, but also from temporal changes in spatial boundary conditions.
Article
Chemistry, Multidisciplinary
Wenjuan Shi, Hongjun Liu, Zhaolu Wang
Summary: Orthogonal nanoantennas coupled to Al-doped zinc oxide (AZO) epsilon-near-zero (ENZ) material can achieve broadband large optical nonlinearity for two orthogonal polarization states simultaneously, showing great potential for highly nonlinear all-optical devices on the nanoscale.
Article
Chemistry, Multidisciplinary
Mayu Hasegawa, Junpei Oi, Kyohei Yamashita, Keisuke Seto, Takayoshi Kobayashi, Eiji Tokunaga
Summary: This paper proposes and realizes a simple and inexpensive scheme for single-channel coherent perfect absorption (CPA) of transparent materials. By dip-coating a PVP film on a substrate, white light can be absorbed and extracted through multiple reflections. The materials and substrates used in this scheme can be changed and it has various potential applications.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Anton N. Vetlugin
Summary: This paper develops a theory of coherent perfect absorption (CPA) of quantized standing waves considering the subwavelength thickness of the absorber, merging all known quantum effects of CPA and introducing other regimes of CPA including various entangled states. The detailed analysis sheds light on fundamental aspects of quantum light dissipation and its practical implementation in quantum optics and quantum information.
Article
Physics, Applied
Shuyi Chen, Fanying Meng, Jianhua Shi, Zhu Yan, Yiyang Liu, Zhengxin Liu
Summary: In this study, high-quality multiple-doped indium oxide films were successfully deposited by DC magnetron sputtering at room temperature. The films exhibited high Hall mobility and superior optical transmittance, making them suitable for advanced optoelectronic devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Review
Optics
Colton Fruhling, Mustafa Goksu Ozlu, Soham Saha, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: This study focuses on the role of epsilon-near-zero (ENZ) materials in optical modulation and explores modulation effects under different configurations. The research finds that maximum modulation typically occurs near the ENZ point and resonances in the ENZ region can further enhance modulation strength.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Nanoscience & Nanotechnology
Zhaxylyk A. Kudyshev, Alexander V. Kildishev, Vladimir M. Shalaev, Alexandra Boltasseva
Summary: The Starshot lightsail project aims to build an ultralight spacecraft that can reach Proxima Centauri b in 20 years with propulsion from a high-power laser array. The project imposes extreme requirements on the lightsail's optical, mechanical, and thermal properties. The framework developed can optimize the lightsail's optical and opto-kinematic properties, opening up pathways to a multi-objective optimization of the entire lightsail propulsion system.
Article
Optics
Rambabu Yalavarthi, Omer Yesilyurt, Olivier Henrotte, Stepan Kment, Vladimir M. Shalaev, Alexandra Boltasseva, Alberto Naldoni
Summary: Plasmonic metasurfaces made of self-standing Ni/Au-Pt nanostructured films significantly enhance the electrocatalytic oxidation reaction in direct alcohol fuel cells. This enhancement is achieved by selectively depositing Pt electrocatalysts within the electromagnetic hot spots of Ni/Au metasurfaces, which support photonic and plasmonic modes. The wavelength-dependent investigations suggest that Ni/Au-Pt metasurfaces enhance the methanol oxidation reaction over a broad spectral range and favor different light-induced reaction mechanisms depending on the selected energy window.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Deesha Shah, Morris Yang, Zhaxylyk Kudyshev, Xiaohui Xu, Vladimir M. Shalaev, Igor Bondarev, Alexandra Boltasseva
Summary: In this study, the optical properties of ultrathin films of passivated titanium nitride with thicknesses ranging from 1 to 10 nm were characterized. The experimental results showed that the plasma frequency of the films decreased and the damping increased as the thickness decreased. A theoretical model based on the Keldysh-Rytova potential was used to explain the experimental trends, confirming the thickness-dependent optical properties caused by electron confinement in the plasmonic transdimensional materials.
Review
Optics
Wallace Jaffray, Soham Saha, Vladimir M. Shalaev, Alexandra Boltasseva, Marcello Ferrera
Summary: In recent years, there has been renewed attention in the optics and photonics communities towards transparent conducting oxides (TCOs). TCOs have shown metal-like properties, high optical nonlinearity, and epsilon-near-zero (ENZ) characteristics in the near-infrared spectral range. They have potential applications in transparent electrode fabrication, low-loss plasmonics, and integrated nonlinear optics.
ADVANCES IN OPTICS AND PHOTONICS
(2022)
Article
Chemistry, Multidisciplinary
Soham Saha, Mustafa Goksu Ozlu, Sarah N. Chowdhury, Benjamin T. Diroll, Richard D. Schaller, Alexander Kildishev, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: The unique properties of emerging photonic materials, conducting nitrides and oxides, are explored in this study. The optical properties of polycrystalline titanium nitride and aluminum-doped zinc oxide can be controlled by tailoring the film thickness. The study demonstrates their potential for ENZ-enhanced photonic applications, including optical circuitry, tunable metasurfaces, and nonlinear optical devices.
ADVANCED MATERIALS
(2023)
Article
Optics
Colton Fruhling, Kang Wang, Sarah Chowdhury, Xiaohui Xu, Jeffrey Simon, Alexander Kildishev, Letian Dou, Xiangeng Meng, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: Coherent random lasing in subwavelength quasi-2D perovskite films is observed and studied. Statistical analysis reveals Levy-like intensity fluctuations, replica symmetry breaking confirms random lasing, and spectral and spatial correlation techniques are used to study coherent modes. The observed coherent lasing modes are extended states that result from the random crystal grain structure during fabrication and out-compete diffusive lasing due to their coherence.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Xiaohui Xu, Abhishek B. Solanki, Demid Sychev, Xingyu Gao, Samuel Peana, Aleksandr S. Baburin, Karthik Pagadala, Zachariah O. Martin, Sarah N. Chowdhury, Yong P. Chen, Takashi Taniguchi, Kenji Watanabe, Ilya A. Rodionov, Alexander Kildishev, Tongcang Li, Pramey Upadhyaya, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: The negatively charged boron vacancy defect in boron nitride has potential in quantum sensing, but its low quantum efficiency hampers its practical applications. This study demonstrates significantly higher emission enhancements of the defect using low-loss nanopatch antennas, making it a promising high-resolution magnetic field sensor.
Review
Optics
Soham Saha, Ohad Segal, Colton Fruhling, Eran Lustig, Mordecai Segev, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: Recent advances in ultrafast, large-modulation photonic materials have led to the potential development of photonic time crystals. This perspective discusses the promising candidates for photonic time crystals, outlining their modulation speed and depth. The challenges and possible paths to success are also analyzed.
Review
Optics
Eran Lustig, Ohad Segal, Soham Saha, Colton Fruhling, Vladimir M. Shalaev, Lexandra Boltasseva, Mordechai Segev
Summary: Photonic Time-Crystals (PTCs) are materials with periodically and abruptly varying refractive index in time. This medium exhibits unique properties, such as momentum bands separated by gaps where waves can be exponentially amplified, extracting energy from the modulation. This article provides a brief review of PTC concepts, formulates the vision, and discusses the challenges.
Article
Nanoscience & Nanotechnology
Xiaohui Xu, Zachariah O. Martin, Michael Titze, Yongqiang Wang, Demid Sychev, Jacob Henshaw, Alexei S. Lagutchev, Han Htoon, Edward S. Bielejec, Simeon I. Bogdanov, Vladimir M. Shalaev, Alexandra Boltasseva
Summary: Diamond color centers, particularly the negatively charged silicon vacancy (SiV-) center, have been intensively studied for their potential applications in quantum information technologies, biological imaging, and sensing. In this study, we successfully created single SiV- centers in nanodiamonds through ion implantation, exhibiting stable high-purity single-photon emission with narrow linewidths, offering new possibilities for quantum photonics, sensing, and biomedicine.
Article
Nanoscience & Nanotechnology
Omer Yesilyurt, Samuel Peana, Vahagn Mkhitaryan, Karthik Pagadala, Vladimir M. M. Shalaev, Alexander V. V. Kildishev, Alexandra Boltasseva
Summary: This work proposes a neural network based inverse design technique for the realistic design and fabrication of single material variable-index multilayer films. By integrating simulated systematic and random errors, the same neural network that produced the ideal designs can be retrained to compensate for deposition errors and fabrication imperfections. This approach provides a practical and experimentally viable method for designing high-performance single material multilayer films for a wide range of applications.
Article
Multidisciplinary Sciences
Zhaxylyk A. Kudyshev, Demid Sychev, Zachariah Martin, Omer Yesilyurt, Simeon I. Bogdanov, Xiaohui Xu, Pei-Gang Chen, Alexander V. Kildishev, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: One of the main characteristics of optical imaging systems is spatial resolution, which is restricted by the diffraction limit. Recently, classical and quantum super-resolution techniques have been developed to break the diffraction limit. We propose a machine learning-assisted approach for rapid antibunching super-resolution imaging, achieving a 12 times speed-up compared to conventional methods. This framework enables the practical realization of scalable quantum super-resolution imaging devices compatible with various quantum emitters.
NATURE COMMUNICATIONS
(2023)
Article
Quantum Science & Technology
Zachariah O. Martin, Alexander Senichev, Samuel Peana, Benjamin J. Lawrie, Alexei S. Lagutchev, Alexandra Boltasseva, Vladimir M. Shalaev
Summary: A robust process for fabricating intrinsic single-photon emitters in silicon nitride has been established, showing promise for quantum applications. The photophysical properties of these emitters are probed through measurements of optical transition wavelengths, linewidths, and photon antibunching as a function of temperature. Insight into the potential for lifetime-limited linewidths is provided through measurements of inhomogeneous and temperature-dependent broadening of the zero-phonon lines.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Eran Lustig, Ohad Segal, Soham Saha, Eliyahu Bordo, Sarah N. Chowdhury, Yonatan Sharabi, Avner Fleischer, Alexandra Boltasseva, Oren Cohen, Vladimir M. Shalaev, Mordechai Segev
Summary: We experimentally study optical time-refraction caused by time-interfaces as short as a single optical cycle. By observing the propagation of a probe pulse through a sample with a large refractive index change induced by an intense modulator pulse, we find that increasing the refractive index abruptly leads to red-shifted waves while decreasing it back to the original value causes a subsequent blue-shift. Shortening the temporal width of the modulator pulse leads to a proportionally shorter rise time of the red-shift associated with time-refraction. These experiments are conducted in transparent conducting oxides acting as epsilon-near-zero materials. The findings stimulate questions about the fundamental physics in ultrashort time frames and pave the way for future experiments with photonic time-crystals generated by periodic refractive index changes.
