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Farooq S, Shafique S, Ahsan Z, Cardozo O, Wali F. Tailoring the Scattering Response of Optical Nanocircuits Using Modular Assembly. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2962. [PMID: 36079999 PMCID: PMC9457608 DOI: 10.3390/nano12172962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/09/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Owing to the localized plasmon resonance of an ensemble of interacting plasmonic nanoparticles (NPs), there has been a tremendous drive to conceptualize complex optical nanocircuits with versatile functionalities. In comparison to modern research, there is still not a sufficient level of sophistication to treat the nanostructures as lumped circuits that can be adjusted into complex systems on the basis of a metatronic touchstone. Here, we present the design, assembly, and characterization of single relatively complex photonic nanocircuits by accurately positioning several metallic and dielectric nanoparticles acting as modular lumped elements. In this research, Au NPs along with silica NPs were used to compare the proficiency and precision of our lumped circuit model analytically. On increasing the size of an individual Au NP, the spectral peak resonance not only modifies but also causes more scattering efficiency which increases the fringe capacitance linearly and decreases the nanoinductance of lumped circuit element. The NPs-based assembly induced the required spectral resonance ascribed by simple circuit methods and are depicted to be actively reconfigurable by tuning the direction or polarization of input signals. Our work demonstrates a vital step toward developing the modern modular designing tools of complex electronic circuits into nanophotonic-related applications.
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Affiliation(s)
- Sajid Farooq
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN Av. Prof. Lineu Prestes, 2242-Cidade Universitária, São Paulo 05508-000, Brazil
- Laboratory of Biomedical Optics and Imaging, Federal University of Pernambuco, Recife 50000-000, Brazil
| | - Shareen Shafique
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaoting University, Xi’an 710049, China
| | - Zishan Ahsan
- Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243000, China
| | | | - Faiz Wali
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
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Storterboom J, Barbiero M, Castelletto S, Gu M. Ground-State Depletion Nanoscopy of Nitrogen-Vacancy Centres in Nanodiamonds. NANOSCALE RESEARCH LETTERS 2021; 16:44. [PMID: 33689036 PMCID: PMC7947094 DOI: 10.1186/s11671-021-03503-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 03/01/2021] [Indexed: 05/05/2023]
Abstract
The negatively charged nitrogen-vacancy ([Formula: see text]) centre in nanodiamonds (NDs) has been recently studied for applications in cellular imaging due to its better photo-stability and biocompatibility if compared to other fluorophores. Super-resolution imaging achieving 20-nm resolution of [Formula: see text] in NDs has been proved over the years using sub-diffraction limited imaging approaches such as single molecule stochastic localisation microscopy and stimulated emission depletion microscopy. Here we show the first demonstration of ground-state depletion (GSD) nanoscopy of these centres in NDs using three beams, a probe beam, a depletion beam and a reset beam. The depletion beam at 638 nm forces the [Formula: see text] centres to the metastable dark state everywhere but in the local minimum, while a Gaussian beam at 594 nm probes the [Formula: see text] centres and a 488-nm reset beam is used to repopulate the excited state. Super-resolution imaging of a single [Formula: see text] centre with a full width at half maximum of 36 nm is demonstrated, and two adjacent [Formula: see text] centres separated by 72 nm are resolved. GSD microscopy is here applied to [Formula: see text] in NDs with a much lower optical power compared to bulk diamond. This work demonstrates the need to control the NDs nitrogen concentration to tailor their application in super-resolution imaging methods and paves the way for studies of [Formula: see text] in NDs' nanoscale interactions.
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Affiliation(s)
- Jelle Storterboom
- Optical Sciences Centre, Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, VIC, 3122, Australia
- Department of Imaging Physics, Delft University of Technology, Delft, The Netherlands
| | | | - Stefania Castelletto
- Optical Sciences Centre, Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, VIC, 3122, Australia
- School of Engineering RMIT University, Bundoora, Australia
| | - Min Gu
- Optical Sciences Centre, Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, VIC, 3122, Australia.
- Laboratory for Artificial-Intelligence Nanophotonics, School of Science, RMIT University, Melbourne, VIC, Australia.
- Centre for Artificial-Intelligence Nanophotonics, School of Optical-Electrical and Computer Engineering, The University of Shanghai for Science and Technology, Shanghai, China.
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