Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triaxially strained suspended graphene for large-area pseudo-magnetic
  fields   Strain-engineered graphene has garnered much attention recently owing to the
possibilities of creating substantial energy gaps enabled by pseudo-magnetic
fields. While theoretical works proposed the possibility of creating large-area
pseudo-magnetic fields by straining monolayer graphene along three
crystallographic directions, clear experimental demonstration of such promising
devices remains elusive. Herein, we experimentally demonstrate a triaxially
strained suspended graphene structure that has the potential to possess
large-scale and quasi-uniform pseudo-magnetic fields. Our structure employs
uniquely designed metal electrodes that function both as stressors and metal
contacts for current injection. Raman characterization and tight-binding
simulations suggest the possibility of achieving pseudo-magnetic fields over a
micrometer-scale area. Current-voltage measurements confirm an efficient
current injection into graphene, showing the potential of our devices for a new
class of optoelectronic applications. We also theoretically propose a photonic
crystal-based laser structure that obtains strongly localized optical fields
overlapping with the spatial area under uniform pseudo-magnetic fields, thus
presenting a practical route towards the realization of graphene lasers.

17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph