Dr. Roshan L. Makkar Profile

Dr. Roshan L. Makkar

Scientist at SAMEER

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Author

Publications (8)

Proceedings Article | 9 September 2019 Presentation + Paper

Broadband SiN directional coupler at 850 nm for optical coherence tomography

Bhawna Sharma, Kamal Kishor, Sandeep Sharma, Roshan Makkar

Proceedings Volume 11105, 111050V (2019) https://doi.org/10.1117/12.2529351

KEYWORDS: Waveguides, Optical coherence tomography, Directional couplers, Integrated optics, Silicon, Communication engineering, Optical communications, Electronics, Fiber optic communications, Fiber optics

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Proceedings Article | 9 May 2018 Presentation + Paper

Design and development of portable fluorescence reader using silicon photomultiplier (SiPM) sensor

Roshan Lal Makkar, Sana Syeda Aliya , Vivek Borse, Rohit Srivastava

Proceedings Volume 10680, 106800B (2018) https://doi.org/10.1117/12.2305846

KEYWORDS: Luminescence, Sensors, Power supplies, Tellurium, Cadmium, Electronics, Ultraviolet radiation, Optical filters, Microcontrollers, Light

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Proceedings Article | 20 February 2017 Paper

A low temperature investigation of the optical properties of coupled InAs quantum dots with GaAsN/GaAs spacers

Akshay Balgarkashi, Mahitosh Biswas, Sandeep Singh, Debabrata Das, Anuj Bhatnagar, Roshan Makkar, Nilesh Shinde, Subhananda Chakrabarti

Proceedings Volume 10114, 1011412 (2017) https://doi.org/10.1117/12.2251290

KEYWORDS: Quantum dots, Indium arsenide, Annealing, Optical properties, Convolution, Nitrogen, Indium, Gallium arsenide, Heterojunctions, Luminescence

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Proceedings Article | 20 February 2017 Paper

Low-temperature photoluminescence studies in epitaxially-grown GaAsN/InAs/GaAsN quantum-dot-in-well structures emitting at 1.31 um

A. Balgarkashi, M. Biswas, S. Singh, D. Das, N. Shinde, R. Makkar, A. Bhatnagar, S. Chakrabarti

Proceedings Volume 10114, 101140Q (2017) https://doi.org/10.1117/12.2250527

KEYWORDS: Luminescence, Annealing, Nitrogen, Laser communications, Gallium arsenide, Crystals, Indium arsenide, Quantum wells, Indium gallium arsenide, Optical properties

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Proceedings Article | 27 January 2017 Paper

A low-temperature photoluminescence study of GaAs1-xNx/GaAs multiple quantum-wells

M. Biswas, A. Balgarkashi, S. Singh, N. Shinde, R. Makkar, A. Bhatnagar, Subhananda Chakrabarti

Proceedings Volume 10111, 1011139 (2017) https://doi.org/10.1117/12.2251981

KEYWORDS: Gallium arsenide, Optical properties, Chemical species, Homogenization, Quantum wells, Interfaces, Luminescence, Annealing, Nitrogen, Satellites

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Proceedings Article | 16 September 2016 Paper

Impact of rapid thermal annealing on dilute nitride (GaAsN) capped InAs/GaAs quantum dots exhibiting optical emission beyond ~1.5 µm

M. Biswas, A. Balgarkashi, S. Singh, N. Shinde, R. Makkar, A. Bhatnagar, Subhananda Chakrabarti

Proceedings Volume 9919, 991914 (2016) https://doi.org/10.1117/12.2237616

KEYWORDS: Annealing, Gallium arsenide, Quantum dots, Indium arsenide, Nitrogen, Quantum optics, Thermography, Molecular self-assembly, Optical properties, Diffusion

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Proceedings Article | 22 July 2011 Paper

Evanescent field absorption based photonic polymer waveguide biosensor

Indrajit Boiragi, Roshan Makkar, Bikash Dev Choudhury, Soumyo Mukherji, K. Chalapathi

Proceedings Volume 8173, 817304 (2011) https://doi.org/10.1117/12.897799

KEYWORDS: Waveguides, Sensors, Absorption, Biosensors, Polymer multimode waveguides, Polymers, Absorbance, Molecules, Computer aided design, Optical fibers

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Proceedings Article | 25 September 2001 Paper

Fabrication and packaging of 1X8 power splitter/combiner in BK-7 glass at 1.31/1.55-um wavelength

C. Jayakrishnan, Alok Verma, S. Debbarma, Umesh Hivarkar, Roshan Makkar, A. Bhatnagar, K. Chalapathi

Proceedings Volume 4417, (2001) https://doi.org/10.1117/12.441306

KEYWORDS: Packaging, Optical fabrication, Ion exchange, Glasses, Optical testing, Semiconducting wafers, Waveguides, Optical alignment, Integrated optics, Waveguide modes

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Showing 5 of 8 publications

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