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12. Variety, Sabour Chana-1

Author

Kumar, Sanjay, Sultana, Rafat, Kumar, Anand, and Chaturvedi, S.K.

Published
2022

15. Quantitative investigation of quantum emitter yield in drop-casted hexagonal boron nitride nanoflakes

Author

Kretzschmar, Tom, Ritter, Sebastian, Kumar, Anand, Vogl, Tobias, Eilenberger, Falk, and Schmidt, Falko

Subjects
Physics - Optics, Quantum Physics
Abstract

Single photon emitters (SPEs) are a key component for their use as pure photon source in quantum technologies. In this study, we investigate the generation of SPEs from drop-casted hexagonal boron nitride (hBN) nanoflakes, examining the influence of the immersion solution and the source of hBN. We show that, depending on the utilized supplier and solution the number and quality of the emitters changes. We perform a comprehensive optical characterization of the deposited nanoflakes to assess the quality of the generated SPEs. We show quantitative data on SPE yields, highlighting significant variations among solvents and different sources of hBN. This holds particular significance for employing drop-casted nanoflakes as SPE sources in quantum communication, sensing, and imaging. Our method is easily expandable to all kinds of surfaces and can be done without requiring complex fabrication steps and equipment, thus providing the necessary scalability required for industrial quantum applications., Comment: 29 pages, 15 figures

Published
2024

19. Comparative study of quantum emitter fabrication in wide bandgap materials using localized electron irradiation

Author

Kumar, Anand, Cholsuk, Chanaprom, Mishuk, Mohammad N., Hazra, Mouli, Pillot, Clotilde, Matthes, Tjorben, Shaik, Tanveer A., Cakan, Asli, Deckert, Volker, Suwanna, Sujin, and Vogl, Tobias

Subjects
Physics - Applied Physics, Quantum Physics
Abstract

Quantum light sources are crucial foundational components for various quantum technology applications. With the rapid development of quantum technology, there has been a growing demand for materials with the capability of hosting quantum emitters. One such material platform uses fluorescent defects in hexagonal boron nitride (hBN) that can host deep sublevels within the bandgap. The localized electron irradiation has shown its effectiveness in generating deep sublevels to induce single emitters in hBN. The question is whether localized (electron beam) irradiation is a reliable tool for creating emitters in other wide bandgap materials and its uniqueness to hBN. Here, we investigate and compare the fabrication of quantum emitters in hBN and exfoliated muscovite mica flakes along with other 3D crystals, such as silicon carbide and gallium nitride, which are known to host quantum emitters. We used our primary fabrication technique of localized electron irradiation using a standard scanning electron microscope. To complement our experimental work, we employed density functional theory simulations to study the atomic structures of defects in mica. While our fabrication technique allows one to create hBN quantum emitters with a high yield and high single photon purity, it is unable to fabricate single emitters in the other solid-state crystals under investigation. This allows us to draw conclusions on the emitter fabrication mechanism in hBN, which could rely on activating pre-existing defects by charge state manipulation. Therefore, we provide an essential step toward the identification of hBN emitters and their formation process.

Published
2023
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29. Effect of modulated boundary on heat and mass transport of Walter-B viscoelastic fluid saturated in porous medium

Author

Singh Anupama, Jakhar Atul, and Kumar Anand

Subjects
walter-b viscoelastic fluid, internal heat source, double-diffusive convection, concentration modulation, porous medium, temperature modulation, ginzburg–landau equation, Engineering (General). Civil engineering (General), TA1-2040
Abstract

This article depicts the heat and mass transport of the double-diffusive convective flow of Walter-B viscoelastic fluid in highly permeable porous media with an internal heat source. We used weakly nonlinear analysis to quantify the nature of heat and mass transport using the Ginzburg–Landau equation. The Ginzburg–Landau equation has been derived in terms of the amplitude of the stream function. The effect of physical parameters has been examined on Nusselt and Sherwood numbers, which has represented graphically. According to the boundary condition, we have discussed the four scenarios based on the phase angles. Our study has demonstrated that internal heat plays a significant role in heat transfer processes. Furthermore, the elastic parameter leads to a transient augmentation in the heat and mass transfer rate. The main output of the current study is that the highest transport was found when both the modulations were put in out-phase condition (Scenario 1).

Published
2024
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35. Performance Evaluation of RC Elements Under Standard Fire Exposure Using Finite Element Analysis Approach

Author

Kumar, Anand, Ravi Prakash, P., Orabi, Mhd Anwar, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Goel, Manmohan Dass, editor, Kumar, Ratnesh, editor, and Gadve, Sangeeta S., editor

Published
2024
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39. Using a targeted metabolomics approach to explore differences in ARDS associated with COVID-19 compared to ARDS caused by H1N1 influenza and bacterial pneumonia

Author

Lee, Chel Hee, Banoei, Mohammad M., Ansari, Mariam, Cheng, Matthew P., Lamontagne, Francois, Griesdale, Donald, Lasry, David E., Demir, Koray, Dhingra, Vinay, Tran, Karen C., Lee, Terry, Burns, Kevin, Sweet, David, Marshall, John, Slutsky, Arthur, Murthy, Srinivas, Singer, Joel, Patrick, David M., Lee, Todd C., Boyd, John H., Walley, Keith R., Fowler, Robert, Haljan, Greg, Vinh, Donald C., Mcgeer, Alison, Maslove, David, Mann, Puneet, Donohoe, Kathryn, Hernandez, Geraldine, Rocheleau, Genevieve, Trahtemberg, Uriel, Kumar, Anand, Lou, Ma, dos Santos, Claudia, Baker, Andrew, Russell, James A., and Winston, Brent W.

Published
2024
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42. Polarization dynamics of solid-state quantum emitters

Author

Kumar, Anand, Samaner, Çağlar, Cholsuk, Chanaprom, Matthes, Tjorben, Paçal, Serkan, Oyun, Yağız, Zand, Ashkan, Chapman, Robert J., Saerens, Grégoire, Grange, Rachel, Suwanna, Sujin, Ateş, Serkan, and Vogl, Tobias

Subjects
Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics
Abstract

Quantum emitters in solid-state crystals have recently attracted a lot of attention due to their simple applicability in optical quantum technologies. The polarization of single photons generated by quantum emitters is one of the key parameters that play a crucial role in the applications, such as quantum computation that uses the indistinguishability of photons. However, the degree of single photon polarization is typically quantified using time-averaged photoluminescence intensity of single emitters, which provides limited information about the dipole properties in solids. In this work, we use single defects in hexagonal boron nitride and nanodiamond as efficient room-temperature single photon sources to reveal the origin and the temporal evolution of dipole orientation in solid-state quantum emitters. The angle of excitation and emission dipoles relative to the crystal axes are determined experimentally and then calculated using density functional theory, which results in characteristic angles for every specific defect that can be used as an efficient tool for defect identification and understanding their atomic structure. Moreover, the temporal polarization dynamics reveal a strongly modified linear polarization visibility that depends on the excited state decay time of individual excitation. This effect can be traced back potentially to the excitation of excess charges in the local crystal environment. Understanding such hidden time-dependent mechanisms can further be used to improve the performance of polarization-sensitive experiments, in particular that of quantum communication with single photon emitters.

Published
2023
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43. The ideal wavelength for daylight free-space quantum key distribution

Author

Abasifard, Mostafa, Cholsuk, Chanaprom, Pousa, Roberto G., Kumar, Anand, Zand, Ashkan, Riel, Thomas, Oi, Daniel K. L., and Vogl, Tobias

Subjects
Quantum Physics, Condensed Matter - Materials Science, Physics - Applied Physics, Physics - Optics, Physics - Space Physics
Abstract

Quantum key distribution (QKD) has matured in recent years from laboratory proof-of-principle demonstrations to commercially available systems. One of the major bottlenecks is the limited communication distance in fiber networks due to the exponential signal damping. To bridge intercontinental distances, low Earth orbit satellites transmitting the quantum signals over the atmosphere can be used. These free-space links, however, can only operate during the night, as the sunlight otherwise saturates the detectors used to measure the quantum states. For applying QKD in a global quantum internet with continuous availability and high data rates, operation during daylight is required. In this work, we model a satellite-to-ground quantum channel for different quantum light sources to identify the optimal wavelength for free-space QKD in ambient conditions. Daylight quantum communication is possible within the Fraunhofer lines or in the near-infrared spectrum, where the intrinsic background from the sun is comparably low. The highest annual secret key length considering the finite key effect is achievable at the H\textalpha\ Fraunhofer line. More importantly, we provide the full model that can be adapted in general to any other specific link scenario. We also propose a true single-photon source based on a color center in hexagonal boron nitride coupled to a microresonator that can implement such a scheme. Our results can also be applied in roof-to-roof scenarios and are therefore relevant for near-future quantum networks., Comment: Updated version including finite key effects

Published
2023
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46. A novel through-the-scope helix tack-and-suture device for mucosal defect closure following colorectal endoscopic submucosal dissection: a multicenter study

Author

Farha, Jad, Ramberan, Hemchand, Aihara, Hiroyuki, Zhang, Linda Y, Mehta, Amit, Hage, Camille, Schlachterman, Alexander, Kumar, Anand, Shinn, Brianna, Canakis, Andrew, Kim, Raymond E, DʼSouza, Lionel S, Buscaglia, Jonathan M, Storm, Andrew C, Samarasena, Jason, Chang, Kenneth, Friedland, Shai, Draganov, Peter V, Qumseya, Bashar J, Jawaid, Salmaan, Othman, Mohamed O, Hasan, Muhammad K, Yang, Dennis, Khashab, Mouen A, Ngamruengphong, Saowanee, Berrien-Lopez, Rickisha, Mony, Shruti, Mohammed, Zahraa, Bucobo, Juan Carlos, Mahmoud, Tala, Mercado, Michael Oliver M, and Radetic, Mark

Subjects
Biomedical and Clinical Sciences, Clinical Sciences, Cancer, Digestive Diseases, Colo-Rectal Cancer, Humans, Endoscopic Mucosal Resection, Cohort Studies, Intestinal Mucosa, Colorectal Neoplasms, Sutures, Retrospective Studies, ESD-Closure working group, Gastroenterology & Hepatology, Clinical sciences
Abstract

BackgroundComplete closure of large mucosal defects following colorectal endoscopic submucosal dissection (ESD) with through-the-scope (TTS) clips is oftentimes not possible. We aimed to report our early experience of using a novel TTS suturing system for the closure of large mucosal defects after colorectal ESD.MethodsWe performed a retrospective multicenter cohort study of consecutive patients who underwent attempted prophylactic defect closure using the TTS suturing system after colorectal ESD. The primary outcome was technical success in achieving complete defect closure, defined as a

Published
2023

47. Intraoperative molecular imaging: 3rd biennial clinical trials update

Author

Bou-Samra, Patrick, Muhammad, Najib, Chang, Austin, Karsalia, Ritesh, Azari, Feredun, Kennedy, Gregory, Stummer, Walter, Tanyi, Janos, Martin, Linda, Vahrmeijer, Alexander, Smith, Barbara, Rosenthal, Eben, Wagner, Patrick, Rice, David, Lee, Amy, Abdelhafeez, Abdelhafeez, Malek, Marcus M, Kohanbash, Gary, Edwards, Wilson Barry, Henderson, Eric, Skjøth-Rasmussen, Jane, Orosco, Ryan, Gibbs, Summer, Farnam, Richard W, Shankar, Lalitha, Sumer, Baran, Kumar, Anand TN, Marcu, Laura, Li, Lei, Greuv, Victor, Delikatny, Edward J, Lee, John YK, and Singhal, Sunil

Subjects
Biomedical and Clinical Sciences, Clinical Sciences, Oncology and Carcinogenesis, Clinical Trials and Supportive Activities, Clinical Research, Cancer, Humans, Child, Neoplasms, Contrast Media, Molecular Imaging, Coloring Agents, intraoperative molecular imaging, contrast agents, clinically significant events, precision surgery, Optical Physics, Biomedical Engineering, Opthalmology and Optometry, Optics, Ophthalmology and optometry, Biomedical engineering, Atomic, molecular and optical physics
Abstract

SignificanceThis third biennial intraoperative molecular imaging (IMI) conference shows how optical contrast agents have been applied to develop clinically significant endpoints that improve precision cancer surgery.AimNational and international experts on IMI presented ongoing clinical trials in cancer surgery and preclinical work. Previously known dyes (with broader applications), new dyes, novel nonfluorescence-based imaging techniques, pediatric dyes, and normal tissue dyes were discussed.ApproachPrincipal investigators presenting at the Perelman School of Medicine Abramson Cancer Center's third clinical trials update on IMI were selected to discuss their clinical trials and endpoints.ResultsDyes that are FDA-approved or currently under clinical investigation in phase 1, 2, and 3 trials were discussed. Sections on how to move benchwork research to the bedside were also included. There was also a dedicated section for pediatric dyes and nonfluorescence-based dyes that have been newly developed.ConclusionsIMI is a valuable adjunct in precision cancer surgery and has broad applications in multiple subspecialties. It has been reliably used to alter the surgical course of patients and in clinical decision making. There remain gaps in the utilization of IMI in certain subspecialties and potential for developing newer and improved dyes and imaging techniques.

Published
2023

49. List of contributors

Author

Achur, Rajeshwar, primary, Adhikary, Krishnendu, additional, Ahire, Eknath D., additional, Akhila, A., additional, Alekhya, Kella, additional, Anousakis, Ch., additional, Ansar, Waliza, additional, Aranha, Ivan, additional, Aravind, Vulli, additional, Arora, Naina, additional, Badgaiyan, Rajendra D., additional, Bagchi, Debasis, additional, Bahekar, Triveni Nilkanth, additional, Balekundri, Amruta, additional, Banerjee, Priyanka, additional, Banerjee, Ritam, additional, Banerjee, Pradipta, additional, Banik, Samudra P., additional, Bansal, Suraj, additional, Baral, Tejaswini, additional, Barh, Debmayla, additional, Baron, David, additional, Batabyal, Nandita, additional, Benson, Ruby, additional, Bhattacharya, Subhrajit, additional, Bhattacharyya, Jhimli, additional, Biswas, Ayan, additional, Biswas, Pallabi, additional, Blanco, Tracey, additional, Blum, Kenneth, additional, Bowirrat, Abdalla, additional, Braverman, Eric R., additional, Chatterjee, Ananya, additional, Chaudhry, Anubha, additional, Chaurasia, Rameshwar Nath, additional, Chowdhury, Sumana Roy, additional, Dakshayini, P.N., additional, Damarasingu, Prasanth, additional, Darshan, J.C., additional, Das, Siddhartha, additional, Das, Arpita, additional, Dasari, Rajasekhar, additional, De, Shaoli, additional, Debnath, Anirban, additional, Dennen, Catherine, additional, Dharmamoorthy, G., additional, Dhavale, Raiu K., additional, Dhingra, Sameer, additional, Downs, B. William, additional, Ejaz, Laila, additional, Ejaz, Haris, additional, Elman, Igor, additional, Evangelou, E., additional, Favas, T.T., additional, Garg, Ravindra K., additional, Giordano, John, additional, Gogoi, Maya, additional, Gold, Mark S., additional, Gupta, Munesh Kumar, additional, Gupta, Ashim, additional, Gupta, Abhishek Amod, additional, Han, David, additional, Hanumegowda, Sujatha M., additional, Hati, Subrota, additional, Helan, K.P., additional, Hemachudha, Pasin, additional, Hemachudha, Thiravat, additional, Hossain, Ashfaque, additional, Hostert, Alyssa, additional, Iorio, E.L., additional, Jain, Pushpendra Kumar, additional, Jana, Sudipta, additional, Jawed, Junaid Jibran, additional, Johnson, Aieshel Serafin, additional, Kachave, Ramanlal N., additional, Karati, Dipanjan, additional, Keceli, T.M., additional, Keservani, Raj K., additional, Kesharwani, Rajesh K., additional, Kesharwani, Anuradha, additional, Keshri, Anand Kumar, additional, Khalsa, Jag, additional, Khona, Dolly K., additional, Kiritsakis, Apostolos, additional, Krishnamani, Madhu, additional, Kumar, Anand, additional, Kumar, Podilapu Manoj, additional, Kumar, Neeraj, additional, Kumar, Shivam, additional, Kumar, Nitesh, additional, Kumari, Reena, additional, Kurian, Shilia Jacob, additional, Lall, Neha, additional, Llanos, Luis Gomez, additional, Mahajan, Sunil K., additional, Majumder, Rajib, additional, Makwana, Mitali, additional, Malhotra, Hardeep Singh, additional, Malhotra, Kiran Preet, additional, Mandal, Supriya, additional, McLaughlin, Thomas, additional, Meenakshi, Sarasa, additional, Mehra, Parul, additional, Mendes, Odete, additional, Metkus, Jarred D., additional, Mitra, Mousumi, additional, Mitra, Sudeep, additional, Mohan, Aishvaryaa, additional, Muili, Fatima, additional, Mukherjee, Swarupananda, additional, Mukherjee, Priyanka, additional, Murti, Krishna, additional, Nandi, Dilip Kumar, additional, Narapaka, Pavan Kumar, additional, Njie Mbye, Ya Fatou, additional, Oh, Angela, additional, Ohia, Sunny E., additional, Okolie, Anthonia, additional, Opere, Catherine A., additional, Paliwal, Vimal Kumar, additional, Panda, Satyajit, additional, Parihar, Vipan Kumar, additional, Patil, Dhananjay M., additional, Patil, Sharangouda J., additional, Pattanayak, Sudeepta, additional, Prabhu, Vikas Vittal, additional, Prasad, P. Dharani, additional, Prasad, Amit, additional, Preethi, Pakala, additional, Premalatha, S.J., additional, Raina, Hansika Sanjay, additional, Ramírez, Yael Quiles, additional, Rawat, Suraj Singh, additional, Renuka Jyothi, S., additional, Robinson, Conrad, additional, Roy, Uddappanda Bopaiah, additional, Rupreo, Vibeizonuo, additional, S., Theertha, additional, S.S., Kiron, additional, Saha, Rudra P., additional, Saifeddine, Mohamad, additional, Saini, Ankit Kumar, additional, Samanta, Saptadip, additional, Sannaningaiah, Devaraja, additional, Sanyal, Saptarshi, additional, Saranya, K., additional, Sarkar, Riya, additional, Sen, Amartya, additional, Sengar, Pratishtha, additional, Shahidi, F., additional, Sharma, Swati, additional, Shelke, Akshay, additional, Sheth, Meet, additional, Shibu, Shalmy M., additional, Shivaprasad, H.N., additional, Shukla, Kuldeep, additional, Simpatico, Thomas A., additional, Singh, Abhilasha, additional, Singh, Anshul, additional, Singh, Varun Kumar, additional, Singh, Abhishek Kumar, additional, Singh, Manoj Kumar, additional, Singh, Meghna, additional, Soman, Sauparnika, additional, Sonal Sekhar, M., additional, Sonawane, Deepak D., additional, Sonawane, Vijayraj N., additional, Soni, Gaurav, additional, Sravani, T., additional, Srivastava, Nimish, additional, Srivastava, Chhitij, additional, Surana, Khemchand R., additional, Tejan, Nidhi, additional, Thanos, Panayotis K., additional, Tom, Annmaria, additional, Tsitsipas, Ch., additional, Udaya Kumar, V., additional, Uniyal, Ravi, additional, Urs, Vijeth L., additional, Veeranna, S., additional, Venkatappa, Manjula M., additional, Ward, D. Isum, additional, Wozniak, Lucyna A., additional, Yadav, Latika, additional, and Manasa, Goudicherla, additional

Published
2024
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