{"title":"Optical field enhanced tunable plasmonic absorber based on high-index contrast grating employing ENZ state of ITO","authors":"Suresh Kumar Pandey, Rahul Dev Mishra, Ashutosh Kumar, Santosh Kumar, Prem Babu, Nikita Mohanta, Mukesh Kumar","doi":"10.1007/s11082-026-09128-0","DOIUrl":null,"url":null,"abstract":"<div><p>An optical field-enhanced tunable plasmonic absorber based on a high-index contrast grating (HCG) utilizes the epsilon-near-zero (ENZ) properties of indium tin oxide (ITO) is experimentally demonstrated<i>. </i>The HCG enhances light–matter interaction, while the engineered ENZ state of ITO increases optical absorption. The plasma frequency is tailored to 1550 nm to enable efficient electro‑optic tuning. The device demonstrates precise control of light absorption and modulation, achieving an extinction ratio of 1.9 dB/µm, It also supports a 3 dB bandwidth of 72 GHz, making it suitable for high-speed optical communication systems. Additionally, energy consumption is remarkably low, at 56.25 p-Joules/bit, underscoring its efficiency. These results indicate that the proposed absorber is a promising candidate for low‑power and high‑speed integrated photonic systems<i>.</i></p></div>","PeriodicalId":720,"journal":{"name":"Optical and Quantum Electronics","volume":"58 12","pages":""},"PeriodicalIF":4.0000,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical and Quantum Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11082-026-09128-0","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
An optical field-enhanced tunable plasmonic absorber based on a high-index contrast grating (HCG) utilizes the epsilon-near-zero (ENZ) properties of indium tin oxide (ITO) is experimentally demonstrated. The HCG enhances light–matter interaction, while the engineered ENZ state of ITO increases optical absorption. The plasma frequency is tailored to 1550 nm to enable efficient electro‑optic tuning. The device demonstrates precise control of light absorption and modulation, achieving an extinction ratio of 1.9 dB/µm, It also supports a 3 dB bandwidth of 72 GHz, making it suitable for high-speed optical communication systems. Additionally, energy consumption is remarkably low, at 56.25 p-Joules/bit, underscoring its efficiency. These results indicate that the proposed absorber is a promising candidate for low‑power and high‑speed integrated photonic systems.
期刊介绍：
Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest.
Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.
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