56 citations · 275 across the 17 of their papers we have counts for
17 papers
Semi-analytical theory of emission and transport in a LAFE-based diode
Debabrata Biswas, Rashbihari Rudra, Raghwendra Kumar
A large area field emitter (LAFE) typically consists of several thousands of nanoscale emitting tips. These are difficult to simulate using purely numerical methods based on finite…
Predicting space-charge affected field emission current from curved tips
Debabrata Biswas, Raghwendra Kumar, Gaurav Singh
Field emission studies incorporating the effect of space charge reveal that for planar emitters, the steady-state field , after initial transients, settles down to a value low…
Approximate universality in the electric field variation on a field-emitter tip in the presence of space charge
Raghwendra Kumar, Gaurav Singh, Debabrata Biswas
The electric field at the surface of a curved emitter is necessary to calculate the field emission current. For smooth parabolic emitting tips where space charge is negligible, var…
Simulating multiscale gated field emitters -- a hybrid approach
Shreya Sarkar, Raghwendra Kumar, Gaurav Singh +1
Multi-stage cathodes are promising candidates for field emission due to the multiplicative effect in local field predicted by the Schottky conjecture and its recent corrected count…
Enhanced space charge limited current for curved electron emitters
Gaurav Singh, Raghwendra Kumar, Debabrata Biswas
The maximum current that can be transported across a vacuum diode is limited by forces arising due to space charge. In a planar diode configuration, the space charge limited (SCL)…
A simple metamaterial absorber associated with Fano-like resonance
Raghwendra Kumar, S. Anantha Ramakrishna
A simple metamaterial absorber suitable for fabrication over large areas associated with a Fano like resonance is proposed. The proposed designed of the metamaterial absorber consi…