Article
Chemistry, Physical
Chenyi Zhang, Minghong Yu, Yiying Yan, Lipeng Chen, Zhiguo Lu, Yang Zhao
Summary: This paper investigates the emission spectra of dissipative Rabi and Jaynes-Cummings models in the non-Markovian and ultrastrong coupling regimes. A polaron-transformed Nakajima-Zwanzig master equation (PTNZE) is derived to accurately calculate the emission spectra in certain ultrastrong coupling regimes where the standard second-order Nakajima-Zwanzig master equation fails.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Aayush Rai, Seemesh Bhaskar, Kalathur Mohan Ganesh, Sai Sathish Ramamurthy
Summary: In the past decade, various interfacial materials have been explored for improved sensor performance in nanoplasmonics. However, the use of gold in surface plasmon-coupled emission (SPCE) platform is limited due to its quenching phenomenon. This study presents a frugal and bio-friendly technique using the widely available co-polymer kollidon (R) to obtain silver-gold nanohybrids, and demonstrates their potential in fluorescence enhancement and mobile phone-based detection of amino acids.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Optics
Sofia Arranz Regidor, Stephen Hughes
Summary: We introduced a three-qubit waveguide-QED system to achieve a cavity-QED strong-coupling regime for a probe qubit embedded in atomlike mirrors, which was realized in recent experiments. By extending this system into the deep non-Markovian regime, we demonstrated the profound role that retardation plays on the dressed resonances, allowing significant improvement in polariton lifetimes and realization of various functionalities.
Article
Physics, Multidisciplinary
Ahmad Shafiei Aporvari, David Vitali
Summary: Cavity optomechanics serves as a flexible platform for implementing quantum technologies, especially for quantum interfaces, sensors, and information processing. By utilizing a Josephson circuit to mediate the interaction, a significant enhancement of single-photon optomechanical coupling can be achieved, leading to effective behavior similar to a cavity optomechanical system in the strong coupling regime for the tripartite hybrid system.
Article
Nanoscience & Nanotechnology
Ernesta Buzavaite-Verteliene, Vilius Vertelis, Zigmas Balevicius
Summary: Total internal reflection ellipsometry was used to excite and study the hybrid Tamm plasmon-surface plasmon polaritons mode, with a simple optical methodology proposed using optical filters to cut the incident light spectra. The experimental studies showed that strong coupling in the investigated system is enough to excite only one component of the hybrid excitation, leading to similar dispersion relations as when excited with a whole spectrum. The obtained Rabi splitting for the hybrid TPP and SPP modes in the multilayered structure was approximately 105 meV.
Article
Optics
Hongda Yu, Zhe Shen, Kaiwen Jiang
Summary: This Letter reports the intrinsic relationship among surface plasmon polaritons, lateral optical force, and surface plasmon-coupled emission. The unidirectional excitation of surface plasmon polaritons through spin-orbit coupling generates asymmetric scattering and counter-intuitive lateral optical force. The influence of lateral optical force can be observed in surface plasmon-coupled emission patterns.
Article
Multidisciplinary Sciences
F. Yoshihara, S. Ashhab, T. Fuse, M. Bamba, K. Semba
Summary: In our study, we found a correspondence between the Hamiltonian of a superconducting circuit that includes a single-Josephson-junction flux qubit inductively coupled to an LC oscillator and the quantum Rabi Hamiltonian. Even in the deep-strong-coupling regime, the energy level structure of the circuit Hamiltonian can still fit well with the quantum Rabi Hamiltonian. However, the circuit Hamiltonian cannot be approximated by the variant of the quantum Rabi Hamiltonian obtained using an analogous procedure, highlighting the differences between the flux and charge gauges due to the properties of the qubit Hamiltonian eigenstates.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Ting-ting Ma, Dmitri B. Horoshko, Chang-shui Yu, Sergei Ya Kilin
Summary: We investigate the photon and phonon statistics in a qubit-plasmon-phonon hybrid system in the ultrastrong coupling regime. Our results reveal strong antibunching behavior for both photons and phonons at the same frequency. However, while photons exhibit strong bunching in dominant frequency regions, phonons tend to weak antibunching within the photonic strong-bunching area. Breaking parity induces reverse statistical behaviors in low-frequency regions and strong-bunching properties in other frequency regions. The photon-phonon cross-correlation function also demonstrates parity-induced differences, indicating that nonconserving parity leads to photon-phonon bunching behavior.
Article
Engineering, Electrical & Electronic
Fan Wu, Rongzhen Jiao, Li Yu
Summary: Exploitation of strong light-matter interactions in plasmonic systems is crucial for fundamental studies and new applications. The study presents an analytic model of the interaction between localized surface plasmon resonances and excitons, providing important guidelines for achieving strong plasmon-exciton coupling. Rabi splittings and anticrossing behavior are demonstrated in the calculated extinction spectra, along with proposing an analytic model for describing strong coupling between excitons and plasmons in core-shell nanorod structures.
IEEE PHOTONICS JOURNAL
(2021)
Article
Optics
J. M. Betancourt, F. J. Rodriguez, L. Quiroga, N. F. Johnson
Summary: This passage discusses the discovery of singularitylike structures in the deep strong-coupling limit of qubit-oscillator systems described by the quantum Rabi model, which may lead to new forms of dynamical phase transitions and have implications for quantum information processing schemes.
Article
Chemistry, Physical
Tomohiro Fukushima, Soushi Yoshimitsu, Kei Murakoshi
Summary: The study investigates the effect of cavity mode on the vibrational coupling behavior of water molecules under different coupling strengths, with a focus on the modulation of cavity thickness. The concentration-dependent Rabi splitting behavior is critical for the determination of water molecules' coupling behavior to vacuum fields, and thinner cells offer advantages for clear spectroscopic investigation of coupling states and modulation of the hydration environment. Additionally, a fundamental cavity mode-dependent structure relationship for controlled molecular properties within a wide coupling strength regime is provided.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Sabine Eisold, Laura Hoppe Alvarez, Ke Ran, Rebecca Hengsbach, Gerhard Fink, Silvia Centeno Benigno, Joachim Mayer, Dominik Woell, Ulrich Simon
Summary: This study presents a novel DNA-microgel hybrid system with dual thermal responsiveness, allowing for controlled uptake and release of DNA at different temperatures. The results demonstrate that programmable DNA hybridization can be achieved through the design of specific DNA sequences, providing new possibilities for potential applications in biological environments.
Article
Nanoscience & Nanotechnology
Vasilii Burtsev, Elena Miliutina, Pavel Ulbrich, Roman Elashnikov, Vaclav Svorcik, Martin Orendac, Oleksiy Lyutakov
Summary: This paper presents a method for plasmon-induced organic reactions using the coupling enhancement between silver nanoparticles and gold gratings, which leads to highly efficient plasmon-triggered reactions.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Vien Thi Tran, Heongkyu Ju
Summary: This study demonstrates the enhancement of fluorescence emitted from dye molecules coupled with two surface plasmons: localized surface plasmons induced by silver nanoparticles (AgNPs) and surface plasmons supported by thin silver film. By coating a 50 nm-thick Ag film on one surface of a SiO2 layer, waveguide-modulated version of surface plasmon coupled emission (SPCE) can be achieved, providing opportunities for optimizing the waveguide structure to enhance fluorescent signals. The combined effect of LSP enhanced dye excitation and waveguide-modulated SPCE could potentially enhance fluorescent signals for highly sensitive detection of biomedical and chemical substances.
Article
Biochemical Research Methods
Anik Mazumder, Mohammad Mozammal, Muhammad Anisuzzaman Talukder
Summary: Cell imaging is crucial for biomedical and microbiology studies, but three-dimensional imaging is challenging and requires expensive and complex equipment. This study proposes a low-cost imaging technique using surface plasmon coupled emission patterns to accurately image cells.
JOURNAL OF BIOMEDICAL OPTICS
(2022)
Article
Materials Science, Multidisciplinary
Seemesh Bhaskar, Pratyusha Das, Venkatesh Srinivasan, Shivakiran B. N. Bhaktha, Sai Sathish Ramamurthy
Summary: The combination of Ag surface plasmon colloid and high refractive index Nd2O3 ‘Huygen’ sources successfully achieved photonic enhancement of fluorescence and polarized emission. The study reveals the synergistic effects of metal and dielectric plasmonics with photonic crystal interface, providing new insights for biophysicochemical research.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Multidisciplinary
K. R. Shubhashree, Roopa Reddy, Ambika Kankayya Gangula, G. S. Nagananda, Pradeep Kumar Badiya, Sai Sathish Ramamurthy, Pornanong Aramwit, Narendra Reddy
Summary: Copper nanoparticles with antimicrobial and cytotoxic properties were synthesized using extracts from Hyptis suaveolens. The nanoparticles showed excellent antimicrobial activity and were mostly made of copper. The wild tulsi extract and nanoparticles were non-toxic at lower concentrations but showed cytotoxicity at higher concentrations and with extended incubation times.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Aayush Rai, Seemesh Bhaskar, Kalathur Mohan Ganesh, Sai Sathish Ramamurthy
Summary: This study presents a green chemistry approach for the synthesis of AgAu nanohybrids using UV treatment and a biocompatible pharmaceutical carrier. The synthesized nanohybrids exhibited unique nano-geometries and generated regions of augmented electromagnetic intensity, leading to enhanced surface plasmon-coupled emission and directional dequenched emission. The obtained enhanced emission was further utilized for achieving femtomolar sensitivity in the detection of the amino acid cysteine using a mobile phone-based plasmonics platform.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Aayush Rai, Seemesh Bhaskar, Kalathur Mohan Ganesh, Sai Sathish Ramamurthy
Summary: In the past decade, various interfacial materials have been explored for improved sensor performance in nanoplasmonics. However, the use of gold in surface plasmon-coupled emission (SPCE) platform is limited due to its quenching phenomenon. This study presents a frugal and bio-friendly technique using the widely available co-polymer kollidon (R) to obtain silver-gold nanohybrids, and demonstrates their potential in fluorescence enhancement and mobile phone-based detection of amino acids.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Seemesh Bhaskar, Dipin Thacharakkal, Sai Sathish Ramamurthy, Chandramouli Subramaniam
Summary: Introduces a carbon florets structure as a non-plasmonic dielectric interface, which enhances light entrapment and achieves plasmon-free generation of electromagnetic hotspots.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Seemesh Bhaskar, Venkatesh Srinivasan, Sai Sathish Ramamurthy
Summary: The green synthesis of nanomaterials with multifaceted applications in photonics and biomedical fields is a difficult challenge. This study demonstrates a 1-minute, user-friendly, and eco-friendly green synthesis of Nd2O3-Ag nanohybrids with synergistic surface functionalities. The nanohybrids possess excellent bactericidal, fungicidal, antioxidant, and anticancer properties, and can be used for food hazard sensing. The proposed methodology has the potential for transdisciplinary nanophotonics and biomedical sensing applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Vijay Sai Krishna Cheerala, Kalathur Mohan Ganesh, Seemesh Bhaskar, Sai Sathish Ramamurthy, Sundaresan Chittor Neelakantan
Summary: Photoplasmonic platforms are used to bridge nanochemistry and biosensing approaches, enhancing sensitivity and quantification of analytes. A benzoxazolium-based fluorescent molecule, DSBO, is synthesized to selectively detect CN- ions in water samples. Spectro-plasmonic analysis reveals dequenching of fluorescent signal with metal-pi plasmon coupling in nanovoids and nanocavities. The CN- ion sensing is experimentally validated and can be combined with smartphone-based SPCE detection technology for resource-limited settings.
Article
Optics
Kalathur Mohan Ganesh, Aayush Rai, Seemesh Bhaskar, Narendra Reddy, Sai Sathish Ramamurthy
Summary: Environmentally benign plasmonic nanomaterials are utilized for sensing applications, with castor proteins being used as a unique biomaterial for plasmonic sensing. The study demonstrates the synthesis of rod-shaped silver nanoparticles (AgNPs) using castor protein as both the reducing and capping agent. The AgNPs were coupled with propagating surface plasmon polaritons to achieve enhanced and directional fluorescence enhancement. The hybrid coupling of pi-plasmons of graphene oxide with the AgNPs contributed to the observed 1000-fold fluorescence enhancement.
JOURNAL OF LUMINESCENCE
(2023)
Article
Nanoscience & Nanotechnology
S. Sudha Maria Lis, Seemesh Bhaskar, Rahul Dahiwadkar, Sriram Kanvah, Sai Sathish Ramamurthy, B. N. Shivakiran Bhaktha
Summary: The functionality of metallic and dielectric nanomaterials in generating intense electromagnetic field hotspots has been explored for biosensing applications. However, parasitic Ohmic losses and the presence of metallic components have limited the fluorescence intensity. In this study, high refractive index and biocompatible BCZT nanoparticles were used to significantly enhance the fluorescence signal in both metal-dependent and lossless platforms.
ACS APPLIED NANO MATERIALS
(2023)
Article
Endocrinology & Metabolism
Sriram Rathnakumar, Naga Sai Visweswar Kambhampati, R. Saiswaroop, Sai Sanwid Pradhan, G. Ramkumar, Nirmala Beeraka, Gopi Krishna Muddu, Sandeep Kumar, Sai Kiran Javvaji, Ashish Parangoankar, Venketesh Sivaramakrishnan, Sai Sathish Ramamurthy
Summary: This study identified molecular signatures associated with different phases of dengue through integrated clinical and metabolomic analysis. The findings have significant implications for dengue research.
Article
Materials Science, Multidisciplinary
Sriram Rathnakumar, Seemesh Bhaskar, Pradeep Kumar Badiya, Venketesh Sivaramakrishnan, Venkatesh Srinivasan, Sai Sathish Ramamurthy
Summary: We synthesized electrospun PVA nanofibers doped with Titania nanoparticles (NPs) for plasmon-coupled fluorescence studies and obtained enhanced effects, with the highest enhancements achieved using TiCN-doped nanofibers (about 150-fold). Nanofibers showed greater and highly polarized emission enhancements compared to 2D thin films, which exhibited dual polarizations at higher concentrations of PVA. These results suggest that 1D nanofibers can serve as green and low-cost alternatives to 2D nano thin films.
MRS COMMUNICATIONS
(2023)
Article
Electrochemistry
Sai Gourang Patnaik, Ines Escher, Guillermo A. Ferrero, Philipp Adelhelm
Summary: Graphite anodes and glyme-based electrolytes show good compatibility with Prussian white cathodes, resulting in high power density and good cyclability.
BATTERIES & SUPERCAPS
(2022)
