David N. Carvalho

David N. Carvalho
Nordic Institute for Theoretical Physics | Nordita

Doctor of Philosophy

About

8
Publications
818
Reads
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19
Citations
Citations since 2016
8 Research Items
19 Citations
201620172018201920202021202201234567
201620172018201920202021202201234567
201620172018201920202021202201234567
201620172018201920202021202201234567
Additional affiliations
January 2015 - present
Heriot-Watt University
Position
  • Research Assistant
Description
  • Mathematics Labs - Second Year - (2 academic years) Solid State Physics - Third Year - (4 academic years) Mathematical Physics - Second Year (1 academic year)
November 2014 - May 2018
Heriot-Watt University
Position
  • PhD Student
July 2013 - August 2013
The University of Warwick
Position
  • Research Intern
Education
October 2010 - June 2014
The University of Warwick
Field of study
  • Mathematics and Physics

Publications

Publications (8)
Preprint
Full-text available
Recent techniques have allowed transition metal dichalcogenides (TMD) monolayers to be grown and adequately characterised. Of particular interest, their nonlinear optical response presents many promising opportunities for future nanophotonic devices and technology. The dispersion of the carriers is trigonally-warped, leading to an anisotropic Fermi...
Poster
Full-text available
A summary of the methods, results and conclusions of the paper with the same name - https://www.researchgate.net/publication/320371077_The_Nonlinear_Optical_Effects_of_Opening_a_Gap_in_Graphene
Article
Full-text available
Graphene possesses remarkable electronic, optical and mechanical properties that have taken the research of two-dimensional relativistic condensed matter systems to prolific levels. However, the understanding of how its nonlinear optical properties are affected by relativistic-like effects has been broadly uncharted. It has been recently shown that...
Article
Full-text available
The usually-held notion that monolayer graphene, a centrosymmetric system, does not allow even-harmonic generation when illuminated at normal incidence is challenged by the discovery of a peculiar effect we term the dynamical centrosymmetry breaking mechanism. This effect results in a global pulse-induced oscillation of the Dirac cones which in tur...
Article
We discover an unusual phenomenon that occurs when a graphene monolayer is illuminated by a short and intense pulse at normal incidence. Due to the pulse-induced oscillations of the Dirac cones, a dynamical breaking of the layer’s centrosymmetry takes place, leading to the generation of second harmonic waves. We prove that this result can only be f...
Article
Full-text available
We discover an unusual phenomenon that occurs when a graphene monolayer is illuminated by a short and intense pulse at normal incidence. Due to the pulse-induced oscillations of the Dirac cones, a dynamical breaking of the layer's centrosymmetry takes place, leading to the generation of second harmonic waves. We prove that this result can only be f...
Conference Paper
A set of equations is proposed as a model for nonlinear light-matter interactions in monolayer graphene with pulsed light. At normal incidence, these equations predict SHG by encapsulating a new mechanism of centrosymmetry breaking.

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Projects

Project (1)
Project
I study theoretically various condensed matter systems whose quasiparticles in the low-energy regime can be described by Dirac fermions. The relativistic nature of such quasiparticles is used to obtain theoretical models describing optical processes involving light. More particularly, I'm interested in probing these with intense and ultrashort electromagnetic pulses - for instance, with the aid of femtosecond lasers in the visible range - so that novel, nontrivial nonlinear effects can be investigated.