Samir Kumar

Jagannath University

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Ritwick Das

National Institute of Science Education and Research

Partha Sona Maji

Bridge University

Mukesh Kumar Shukla

Tata Institute of Fundamental Research

Rupam Mukherjee

Presidency University

Amit Ranjan Maity

Amity University

K. V. Anil Kumar

Mangalore University

Uddipan Chowdhury

S.M. Dharmaprakash

Mangalore University

Chandra Shekhar Purohit

National Institute of Science Education and Research

Supratim Chatterjee

Birla Institute of Technology and Science - Hyderabad Campus

Cooperative Institutions

National Institute of Science Education and Research

Homi Bhabha National Institute

Institute of Physics, Bhubaneshwar

Indian Institute of Technology Kanpur

Mangalore University

Indian Institute of Technology Kharagpur

University Research Co (United States)

Jadavpur University

Jai Prakash Vishwavidyalaya

Bridge University

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Refractive Index Sensing Using Tamm Plasmons in Photonic Quasicrystals

Sensing and Imaging (2023)

Uddipan Chowdhury Rupam Mukherjee Amit Ranjan Maity Samir Kumar Partha Sona Maji

Aperiodic graph

Figure of Merit

Transfer-matrix method (optics)

10.1007/s11220-023-00435-4

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Citations (2)

Single-pass, multi-watt second-harmonic-generation in congruent and stoichiometric LiTaO3

2022 IEEE Photonics Conference (IPC) (2015)

Mukesh Kumar Shukla Samir Kumar Ritwick Das

We present a comparison of an efficient, single-pass second-harmonic-generation (SHG) of a continuous-wave, single-frequency Yb-fiber laser in a congruently-grown as well as stoichiometrically-grown LiTaO ₃ crystal. We obtain maximum conversion-efficiency (output-power) of 24% (8.5W) and 36% (14.5W) respectively.

Watt

Stoichiometry

Frequency Conversion

Harmonic

Continuous wave

Crystal (programming language)

Harmonic Analysis

10.1109/ipcon.2015.7323689

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Citations (0)

Self-referenced refractive index sensor utilizing Tamm plasmon in a photonic quasicrystal

Optical and Quantum Electronics (2023)

Uddipan Chowdhury Rupam Mukherjee Amit Ranjan Maity Samir Kumar Partha Sona Maji

Figure of Merit

Transfer-matrix method (optics)

10.1007/s11082-023-05160-6

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Citations (4)

On the Coupling Efficiency of Tamm Plasmon Polaritons

Frontiers in Optics (2017)

Samir Kumar Mukesh Kumar Shukla Ritwick Das

A novel design technique based on structural parameters is proposed for the efficient coupling of light to Tamm plasmon-polaritons (TPPs). Optimization of the structure is essential to completely utilize the field enhancement due to TPPs.

Nanophotonics

10.1364/fio.2017.jw3a.99

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Citations (0)

Phase-dependent ultrafast third-order optical nonlinearities in metallophthalocyanine thin films

Journal of Applied Physics (2016)

Samir Kumar K. V. Anil Kumar S.M. Dharmaprakash Ritwick Das

We present a comprehensive study on the impact of phase transformations of metallophthalocyanine thin films on their third-order nonlinear optical (NLO) properties. The metallophthalocyanine thin films are prepared by thermally evaporating the commercially available Copper(II)2,9,16,23-Tetra-tert-butyl-29H,31H-phthalocyanine (CuPc) and Zinc(II) 2,9,16,23-Tetra-tert-butyl-29H,31H-phthalocyanine (ZnPc) powder on glass substrate. Thermal annealing causes a phase transformation which has a distinct signature in powder X-ray diffraction and UV-Vis-NIR spectroscopy. The NLO characteristics which include nonlinear refractive index n2, as well as nonlinear absorption coefficient (βeff), were measured by using a single beam Z-scan technique. An ultrashort pulsed fiber laser emitting femtosecond pulses (Δτ ≈ 250 fs) at 1064 nm central wavelength is used as a source for the Z-scan experiment. The βeff values in as prepared thin films were ascertained to be smaller as compared to the annealed one due to the smaller value of saturation intensity (Is) which, in turn, is a consequence of ground-state bleaching in the thermally unstable amorphous state of the molecule. Interestingly, the nonlinear refractive indices bear opposite sign for CuPc and ZnPc. The variations in the third-order nonlinearity in CuPc and ZnPc are discussed in terms of molecular packing and geometries of metallophthalocyanine molecules.

Z-scan technique

10.1063/1.4962977

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Citations (23)

Tamm-plasmon resonance based temperature sensor in a Ta2O5/SiO2 based distributed Bragg reflector

Sensors and Actuators A Physical (2017)

Samir Kumar Partha Sona Maji Ritwick Das

Transfer-matrix method (optics)

Reflector (photography)

10.1016/j.sna.2017.03.038

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Citations (55)

Single-Pass Multi-Watt Second-Harmonic-Generation in Congruent and Stoichiometric LiTaO<sub>3</sub>

IEEE Photonics Technology Letters (2015)

Mukesh Kumar Shukla Samir Kumar Ritwick Das

We present a comparison of an efficient, single-pass second-harmonic-generation (SHG) of a continuous-wave Yb-fiber laser using a 1) congruently grown LiTaO ₃ crystal and 2) stoichiometrically grown LiTaO ₃ crystal. Using a Yb-fiber laser pump source delivering a single-frequency output of 40 W at 1064 nm, we have generated ~ 8.5 and 14.5 W of single-frequency green-radiation at 532 nm from 8 mol% MgO-doped periodically poled, congruently grown LiTaO ₃ (MgO:cPPLT) crystal and 0.5 mol% MgO-doped periodically poled, stoichiometrically grown LiTaO ₃ (MgO:sPPLT) crystal, respectively. We obtained SHG conversion efficiencies in excess of 24% for 5-cm long MgO:cPPLT and ≥36% for 3-cm long MgO:sPPLT. The impact of thermal dephasing was evident in variation of SH power in case of MgO:cPPLT crystal. However, the manifestations due to thermal effect were found out be significantly weaker in case of MgO:sPPLT. This lead to saturation of SHG efficiency at pump powers ≥20 W for MgO:cPPLT. The long-term peak-to-peak power-fluctuation in case of MgO:sPPLT is recorded to be ≈ 4 % for the green beam over a 4-h duration which shows improved performance over MgO:cPPLT output (peak-to-peak power-fluctuation ≈ 11 %). In addition, the 532-nm radiation exhibited single-frequency characteristics with linewidth of 12 MHz (MgO:cPPLT) and 5 MHz (MgO:sPPLT).

Crystal (programming language)

Stoichiometry

Continuous wave

10.1109/lpt.2015.2421643

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Citations (6)

Refractive Index Sensing With 1D Photonic Crystal

Frontiers in Optics (2017)

Samir Kumar Ritwick Das

A refractive index sensor is proposed based on the cavity mode formed in a thin analyte layer sandwiched between multilayers of SiO2/Ta2O5, and a metal film. This study opens up alternatives to the SPR based biochemical sensors.

Optical sensing

10.1364/ls.2017.lth2f.3

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Citations (1)

Transition Metal Nitride as a Plasmonic Material for Tamm Plasmon States

Conference on Lasers and Electro-Optics (2020)

Samir Kumar

Tamm plasmon polaritons (TPP) modes localized at the interface of distributed Bragg reflector (DBR) and Titanium Nitride (TiN) films are investigated. Impact of TiN thickness on TPP modes is carried out using Transfer matrix method.

Transfer-matrix method (optics)

10.1364/cleo_at.2020.jtu2d.5

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Citations (1)

Design of Simultaneous Refractive Index Sensor Across Multi-Photonic Bandgaps Using Tamm Plasmon Modes

Plasmonics (2024)

Anup Kumar Sharma Amod Kumar Srivastava Partha Sona Maji Samir Kumar

Transfer-matrix method (optics)

Coupled mode theory

Prism

10.1007/s11468-024-02454-7

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Citations (0)