Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Realization of an atomically thin mirror using monolayer MoSe2   Advent of new materials such as van der Waals heterostructures, propels new
research directions in condensed matter physics and enables development of
novel devices with unique functionalities. Here, we show experimentally that a
monolayer of MoSe2 embedded in a charge controlled heterostructure can be used
to realize an electrically tunable atomically-thin mirror, that effects 90%
extinction of an incident field that is resonant with its exciton transition.
The corresponding maximum reflection coefficient of 45% is only limited by the
ratio of the radiative decay rate to the linewidth of exciton transition and is
independent of incident light intensity up to 400 Watts/cm2. We demonstrate
that the reflectivity of the mirror can be drastically modified by applying a
gate voltage that modifies the monolayer charge density. Our findings could
find applications ranging from fast programmable spatial light modulators to
suspended ultra-light mirrors for optomechanical devices.

35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc