Gautam Gupta

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A mixed integer linear program is presented for deterministically scheduling departure aircraft at runways. The method addresses different schemes of managing the departure queuing area by treating it as first-in-first-out queues or as a simple parking area, where any available aircraft can takeoff irrespective of its relative sequence with others. The(More)
Ultrathin molybdenum disulphide (MoS2) has emerged as an interesting layered semiconductor because of its finite energy bandgap and the absence of dangling bonds. However, metals deposited on the semiconducting 2H phase usually form high-resistance (0.7 kΩ μm-10 kΩ μm) contacts, leading to Schottky-limited transport. In this study, we demonstrate that the(More)
The polyhedral model is a well developed formalism and has been extensively used in a variety of contexts viz. the automatic parallelization of loop programs, program verification, locality, hardware generationand more recently, in the automatic reduction of asymptotic program complexity. Such analyses and transformations rely on certain closure properties.(More)
State-of-the-art photovoltaics use high-purity, large-area, wafer-scale single-crystalline semiconductors grown by sophisticated, high-temperature crystal growth processes. We demonstrate a solution-based hot-casting technique to grow continuous, pinhole-free thin films of organometallic perovskites with millimeter-scale crystalline grains. We fabricated(More)
The polyhedral model is now a well established and effective formalism for program optimization and parallelization. However, finding optimal transformations is a long-standing open problem. It is therefore important to develop tools that, rather than following prede-fined optimization criteria, allow practitioners to explore different choices through(More)
Many computations can be modeled with systems of affine recurrence equations (SAREs) over polyhedral domains. We study the problem of scheduling individual computations of an SARE in the presence of reductions i.e., operations specifying the accumulation of a set of values to produce a single value. Reductions involve a commutative and associative operator(More)
Articles you may be interested in Separation of interlayer resistance in multilayer MoS2 field-effect transistors Appl. Growth-substrate induced performance degradation in chemically synthesized monolayer MoS2 field effect transistors Appl. Electrical performance of monolayer MoS2 field-effect transistors prepared by chemical vapor deposition Appl.(More)
Atomic layers of two-dimensional (2D) materials have recently been the focus of extensive research. This follows from the footsteps of graphene, which has shown great potential for ultrathin optoelectronic devices. In this paper, we present a comprehensive study on the synthesis, characterization, and thin film photodetector application of atomic layers of(More)
A fundamental understanding of the intrinsic optoelectronic properties of atomically thin transition-metal dichalcogenides (TMDs) is crucial for its integration into high performance semiconductor devices. Here, we investigate the transport properties of chemical vapor deposition (CVD) grown monolayer molybdenum disulfide (MoS2) under photoexcitation using(More)