Ambarish Ghosh

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Ambarish Ghosh
Born (1973-12-18) 18 December 1973 (age 50)
Kolkata, India
Nationality Indian
Alma mater
Awards
Scientific career
Fields
Institutions
Doctoral advisor Humphrey Maris
Website http://www.cense.iisc.ac.in/ambarish/

Ambarish Ghosh is an Indian scientist, a faculty member at the Centre for Nano Science and Engineering (CeNSE), Indian Institute of Science, Bangalore. He is also an associate faculty at the Department of Physics. He is known for his work on nanorobots, active matter physics, plasmonics, metamaterials and electron bubbles in liquid helium.

Contents

Research work

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Indian Institute of Science

Magnetic nanorobots

In 2009, he along with Peer Fischer demonstrated the use of glancing-angle deposition to fabricate magnetic helical nanorobots. [1] His group worked out the theoretical formulae to describe the dynamics of such nanorobots [2] and presented techniques for their independent control. [3]

In recent years his group has managed to demonstrate various applications of helical nanorobots including techniques to move in important biological environments, such as blood. [4] and as probes for sensing [5] the environment inside living cells. [6] [7]

Plasmonics and Metamaterials

Ambarish Ghosh and his group demonstrated a wafer scale technology to fabricate porous 3D plasmonic metamaterials which can be used over a wide range of wavelengths, including the visible. These metal-dielectric nanostructured films can be made in various geometries [8] [9] [10] and configurations. Very recently, they have demonstrated a novel technique to integrate plasmonic nanoparticles with graphene in a sandwich configuration, allowing them to achieve unprecedented electromagnetic field enhancement and photodetection sensitivity. [11] In 2019, his group showed the application of metal-dielectric hybrid nanorods in active opto-fluidic manipulation of sub-micron colloids.

Electron bubbles in Liquid Helium

The group led by Ambarish Ghosh demonstrated trapping [12] of multielectron bubbles in liquid helium-4, which can open up new avenues in the study of two-dimensional electron systems at high densities, and on curved surfaces. The same group also performed high speed imaging [13] of the "explosion" of an electron bubbles triggered by focused ultrasound.

Recognition

Ambarish received the Young Career Award in Nano Science and Technology for 2017 from DST Nanomission, India. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology for his contributions to physical sciences in 2018. [14] He received the Prof. Ramakrishna Rao Chair Professorship [15] from 2017–2020. He was elected as Fellow of INAE (Indian National Academy of Engineering) in 2020. [16]

Related Research Articles

<span class="mw-page-title-main">Nanorobotics</span> Emerging technology field

Nanoid robotics, or for short, nanorobotics or nanobotics, is an emerging technology field creating machines or robots whose components are at or near the scale of a nanometer. More specifically, nanorobotics refers to the nanotechnology engineering discipline of designing and building nanorobots with devices ranging in size from 0.1 to 10 micrometres and constructed of nanoscale or molecular components. The terms nanobot, nanoid, nanite, nanomachine and nanomite have also been used to describe such devices currently under research and development.

<span class="mw-page-title-main">Nanomotor</span> Molecular device capable of converting energy into movement

A nanomotor is a molecular or nanoscale device capable of converting energy into movement. It can typically generate forces on the order of piconewtons.

Nanophotonics or nano-optics is the study of the behavior of light on the nanometer scale, and of the interaction of nanometer-scale objects with light. It is a branch of optics, optical engineering, electrical engineering, and nanotechnology. It often involves dielectric structures such as nanoantennas, or metallic components, which can transport and focus light via surface plasmon polaritons.

<span class="mw-page-title-main">Surface plasmon</span>

Surface plasmons (SPs) are coherent delocalized electron oscillations that exist at the interface between any two materials where the real part of the dielectric function changes sign across the interface. SPs have lower energy than bulk plasmons which quantise the longitudinal electron oscillations about positive ion cores within the bulk of an electron gas.

<span class="mw-page-title-main">Photonic metamaterial</span> Type of electromagnetic metamaterial

A photonic metamaterial (PM), also known as an optical metamaterial, is a type of electromagnetic metamaterial, that interacts with light, covering terahertz (THz), infrared (IR) or visible wavelengths. The materials employ a periodic, cellular structure.

<span class="mw-page-title-main">Surface plasmon polariton</span> Electromagnetic waves that travel along an interface

Surface plasmon polaritons (SPPs) are electromagnetic waves that travel along a metal–dielectric or metal–air interface, practically in the infrared or visible-frequency. The term "surface plasmon polariton" explains that the wave involves both charge motion in the metal and electromagnetic waves in the air or dielectric ("polariton").

A plasmonic metamaterial is a metamaterial that uses surface plasmons to achieve optical properties not seen in nature. Plasmons are produced from the interaction of light with metal-dielectric materials. Under specific conditions, the incident light couples with the surface plasmons to create self-sustaining, propagating electromagnetic waves known as surface plasmon polaritons (SPPs). Once launched, the SPPs ripple along the metal-dielectric interface. Compared with the incident light, the SPPs can be much shorter in wavelength.

Anadi Sankar Gupta was an Indian mathematician. Till his death, he was an INSA Senior Scientist and emeritus faculty with the Department of Mathematics, IIT Kharagpur.

The applications of nanotechnology, commonly incorporate industrial, medicinal, and energy uses. These include more durable construction materials, therapeutic drug delivery, and higher density hydrogen fuel cells that are environmentally friendly. Being that nanoparticles and nanodevices are highly versatile through modification of their physiochemical properties, they have found uses in nanoscale electronics, cancer treatments, vaccines, hydrogen fuel cells, and nanographene batteries.

<span class="mw-page-title-main">Localized surface plasmon</span>

A localized surface plasmon (LSP) is the result of the confinement of a surface plasmon in a nanoparticle of size comparable to or smaller than the wavelength of light used to excite the plasmon. When a small spherical metallic nanoparticle is irradiated by light, the oscillating electric field causes the conduction electrons to oscillate coherently. When the electron cloud is displaced relative to its original position, a restoring force arises from Coulombic attraction between electrons and nuclei. This force causes the electron cloud to oscillate. The oscillation frequency is determined by the density of electrons, the effective electron mass, and the size and shape of the charge distribution. The LSP has two important effects: electric fields near the particle's surface are greatly enhanced and the particle's optical absorption has a maximum at the plasmon resonant frequency. Surface plasmon resonance can also be tuned based on the shape of the nanoparticle. The plasmon frequency can be related to the metal dielectric constant. The enhancement falls off quickly with distance from the surface and, for noble metal nanoparticles, the resonance occurs at visible wavelengths. Localized surface plasmon resonance creates brilliant colors in metal colloidal solutions.

Arindam Ghosh is an Indian experimental condensed matter physicist and a Professor in the Department of Physics, Indian Institute of Science, Bangalore, India. He was awarded the Shanti Swarup Bhatnagar Prize for science and technology, the highest science award in India, for the year 2012 in physical sciences category. In 2020, he was awarded the Infosys Prize for Physical Science, the most prestigious award that recognizes achievements in science and research, in India.

Ortwin Hess is a German-born theoretical physicist at Trinity College Dublin (Ireland) and Imperial College London (UK), working in condensed matter optics. Bridging condensed matter theory and quantum optics he specialises in quantum nanophotonics, plasmonics, metamaterials and semiconductor laser dynamics. Since the late 1980s he has been an author and coauthor of over 300 peer-reviewed articles, the most popular of which, called "'Trapped rainbow' storage of light in metamaterials", was cited more than 400 times. He pioneered active nanoplasmonics and metamaterials with quantum gain and in 2014 he introduced the "stopped-light lasing" principle as a novel route to cavity-free (nano-) lasing and localisation of amplified surface plasmon polaritons, giving him an h-index of 33.

<span class="mw-page-title-main">Plasmonics</span>

Plasmonics or nanoplasmonics refers to the generation, detection, and manipulation of signals at optical frequencies along metal-dielectric interfaces in the nanometer scale. Inspired by photonics, plasmonics follows the trend of miniaturizing optical devices, and finds applications in sensing, microscopy, optical communications, and bio-photonics.

Palliakaranai Thirumalai Narasimhan (1928–2013), popularly known as PTN or Jim, was an Indian theoretical chemist, one of the pioneers of computational chemistry in India and a professor at the Indian Institute of Technology, Kanpur. He was known for his studies on quantum-mechanical interpretation of magnetic resonance data and his contributions in developing IIT Kanpur into a Centre of Excellence in academic research in the basic sciences. He was an elected fellow of the Indian National Science Academy, Indian Academy of Sciences and the National Academy of Sciences, India. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 1970, for his contributions to chemical sciences.

<span class="mw-page-title-main">Bidyendu Mohan Deb</span> Indian chemist (born 1942)

Bidyendu Mohan Deb is an Indian theoretical chemist, chemical physicist and a professor at the Indian Institute of Science Education and Research, Kolkata (IISER). he is known for his studies in theoretical chemistry and chemical physics. He is an elected fellow of the International Union of Pure and Applied Chemistry, The World Academy of Sciences, Indian National Science Academy and the Indian Academy of Sciences. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 1981, for his contributions to chemical sciences.

<span class="mw-page-title-main">Kamanio Chattopadhyay</span> Indian materials engineer

Kamanio Chattopadhyay is an Indian materials engineer and an honorary professor at the Indian Institute of Science, Bengaluru. He is the chair of the Mechanical Sciences Division of IISc and a former chair of the Department of Materials Engineering.

Biswa Ranjan Nag was an Indian physicist and the Sisir Kumar Mitra chair professor at Rajabazar Science College, University of Calcutta. Known for his research in semiconductor physics, Nag was an elected fellow of Indian National Science Academy and Indian Academy of Sciences. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards for his contributions to Physical Sciences in 1974.

Ranganathan Shashidhar is a US-based Indian condensed matter physicist and a former head of the Laboratory for Molecularly Engineered Materials and Surface of the Center for Biomolecular Science & Engineering, a division of the United States Naval Research Laboratory. Known for his research on liquid crystals, Shashidhar is an elected fellow of the Indian Academy of Sciences and the senior vice president of Polestar Technologies, a US-based company involved in the development of sensing technologies. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, for his contributions to Physical Sciences in 1984.

Gattamraju Ravindra Kumar is an Indian laser physicist and a senior professor of Nuclear and Atomic Physics at Tata Institute of Fundamental Research. Known for his research on Ultrashort pulse and Warm dense matter, Kumar is an elected fellow of the Indian Academy of Sciences and the Indian National Science Academy. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, for his contributions to physical sciences in 2003. He is also a recipient of the B. M. Birla Science Prize and Infosys Prize.

Tapas Kumar Maji is a professor in the Chemistry and Physics of Materials Unit at Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru with research interests in topics related to porous materials, nanoscale metal-organic frameworks and composites and functional gel materials. Maji obtained his MSc degree in inorganic chemistry from Burdwan University in 1997 and PhD degree from Indian Association for the Cultivation of Science in 2002. He did a post-doctoral fellowship at Kyoto University, Japan (2003–05).

References

  1. Ghosh, Ambarish; Fischer, Peer (10 June 2009). "Controlled Propulsion of Artificial Magnetic Nanostructured Propellers". Nano Letters. 9 (6): 2243–2245. Bibcode:2009NanoL...9.2243G. doi:10.1021/nl900186w. PMID   19413293.
  2. Ghosh, Arijit; Mandal, Pranay; Karmakar, Suman; Ghosh, Ambarish (2013). "Analytical theory and stability analysis of an elongated nanoscale object under external torque". Physical Chemistry Chemical Physics. 15 (26): 10817. Bibcode:2013PCCP...1510817G. doi:10.1039/c3cp50701g. PMID   23694848.
  3. Mandal, Pranay; Chopra, Vaishali; Ghosh, Ambarish (17 April 2015). "Independent Positioning of Magnetic Nanomotors". ACS Nano. 9 (5): 4717–4725. doi:10.1021/acsnano.5b01518. PMID   25824608.
  4. Ghosh, Souvik; Ghosh, Ambarish (10 January 2018). "Mobile nanotweezers for active colloidal manipulation". Science Robotics. 3 (14): eaaq0076. doi: 10.1126/scirobotics.aaq0076 .
  5. "Nanorobots as Mobile Viscometers".
  6. Pal, Malay; Somalwar, Neha; Singh, Anumeha; Bhat, Ramray; Eswarappa, Sandeep M.; Saini, Deepak K.; Ghosh, Ambarish (May 2018). "Maneuverability of Magnetic Nanomotors Inside Living Cells". Advanced Materials. 30 (22): 1800429. doi:10.1002/adma.201800429. PMID   29635828.
  7. Ghosh, Arijit; Dasgupta, Debayan; Pal, Malay; Morozov, Konstantin I.; Leshansky, Alexander M.; Ghosh, Ambarish (June 2018). "Helical Nanomachines as Mobile Viscometers". Advanced Functional Materials. 28 (25): 1705687. doi:10.1002/adfm.201705687.
  8. Johnson Singh, Haobijam; Ghosh, Ambarish (4 September 2012). "Porous Three Dimensional Arrays of Plasmonic Nanoparticles". The Journal of Physical Chemistry C. 116 (36): 19467–19471. doi:10.1021/jp3062702.
  9. Singh, Johnson Haobijam; Nair, Greshma; Ghosh, Arijit; Ghosh, Ambarish (2013). "Wafer scale fabrication of porous three-dimensional plasmonic metamaterials for the visible region: chiral and beyond". Nanoscale. 5 (16): 7224. Bibcode:2013Nanos...5.7224S. doi:10.1039/C3NR02666C.
  10. Singh, Haobijam Johnson; Ghosh, Ambarish (2018). "Harnessing magnetic dipole resonance in novel dielectric nanomaterials". Nanoscale. 10 (34): 16102–16106. doi:10.1039/C8NR04666B.
  11. Paria, Debadrita; Roy, Kallol; Singh, Haobijam Johnson; Kumar, Shishir; Raghavan, Srinivasan; Ghosh, Arindam; Ghosh, Ambarish (March 2015). "Ultrahigh Field Enhancement and Photoresponse in Atomically Separated Arrays of Plasmonic Dimers". Advanced Materials. 27 (10): 1751–1758. doi:10.1002/adma.201404312.
  12. Vadakkumbatt, Vaisakh; Joseph, Emil; Pal, Anustuv; Ghosh, Ambarish (1 August 2014). "Studying electrons on curved surfaces by trapping and manipulating multielectron bubbles in liquid helium". Nature Communications. 5 (1): 4571. Bibcode:2014NatCo...5.4571V. doi: 10.1038/ncomms5571 . PMID   25081283.
  13. "Electron Bubble Explosion in Liquid Helium".
  14. "Shanti Swarup Bhatnagar Prize (SSB) for Science and Technology 2018" (PDF). Shanti Swarup Bhatnagar Prize. 26 September 2018. Retrieved 26 September 2018.
  15. "Ramakrishna Rao Chair Professorship". Indian Institute of Science. Retrieved 3 November 2019.
  16. "Umanand L, Ambarish Ghosh, & Pramod Kumar have been Elected as of Fellows of The Indian National Academy of Engineering w.e.f. Nov. 1, 2020". Indian Institute of Science, Bengaluru. Retrieved 25 January 2021.