Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laterally-doped heterostructures for III-N lasing devices   To achieve a high-density electron-hole plasma in group-III nitrides for
efficient light emission, we propose a planar two-dimensional (2D) p-i-n
structure that can be created in selectively-doped superlattices and quantum
wells. The 2D p-i-n structure is formed in the quantum well layers due to
efficient activation of donors and acceptors in the laterally doped barriers.
We show that strongly non-equilibrium 2D electron-hole plasma with density
above $10^{12} cm^{-2}$ can be realized in the i-region of the laterally biased
p-i-n structure, enabling the formation of interband population inversion and
stimulated emission from such a LAteral Current pumped Emitter (LACE). We
suggest that implementation of the lateral p-i-n structures provides an
efficient way of utilizing potential-profile-enhanced doping of superlattices
and quantum wells for electric pumping of nitride-based lasers.

16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci