TY  - JOUR
A1  - Suchomel, H.
A1  - Brodbeck, S.
A1  - Liew, T. C. H.
A1  - Amthor, M.
A1  - Klaas, M.
A1  - Klembt, S.
A1  - Kamp, M.
A1  - Höfling, S.
A1  - Schneider, C.
T1  - Prototype of a bistable polariton field-effect transistor switch
JF  - Scientific Reports
N2  - Microcavity exciton polaritons are promising candidates to build a new generation of highly nonlinear and integrated optoelectronic devices. Such devices range from novel coherent light emitters to reconfigurable potential landscapes for electro-optical polariton-lattice based quantum simulators as well as building blocks of optical logic architectures. Especially for the latter, the strongly interacting nature of the light-matter hybrid particles has been used to facilitate fast and efficient switching of light by light, something which is very hard to achieve with weakly interacting photons. We demonstrate here that polariton transistor switches can be fully integrated in electro-optical schemes by implementing a one-dimensional polariton channel which is operated by an electrical gate rather than by a control laser beam. The operation of the device, which is the polariton equivalent to a field-effect transistor, relies on combining electro-optical potential landscape engineering with local exciton ionization to control the scattering dynamics underneath the gate. We furthermore demonstrate that our device has a region of negative differential resistance and features a completely new way to create bistable behavior.
KW  - materials for optics
KW  - nanoscience and technology
KW  - optics and photonics
KW  - semiconductors
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-158323
VL  - 7
IS  - 5114
ER  - 
TY  - JOUR
A1  - Kochereshko, Vladimir P.
A1  - Durnev, Mikhail V.
A1  - Besombes, Lucien
A1  - Mariette, Henri
A1  - Sapega, Victor F.
A1  - Askitopoulos, Alexis
A1  - Savenko, Ivan G.
A1  - Liew, Timothy C. H.
A1  - Shelykh, Ivan A.
A1  - Platonov, Alexey V.
A1  - Tsintzos, Simeon I.
A1  - Hatzopoulos, Z.
A1  - Savvidis, Pavlos G.
A1  - Kalevich, Vladimir K.
A1  - Afanasiev, Mikhail M.
A1  - Lukoshkin, Vladimir A.
A1  - Schneider, Christian
A1  - Amthor, Matthias
A1  - Metzger, Christian
A1  - Kamp, Martin
A1  - Hoefling, Sven
A1  - Lagoudakis, Pavlos
A1  - Kavokin, Alexey
T1  - Lasing in Bose-Fermi mixtures
JF  - Scientific Reports
N2  - Light amplification by stimulated emission of radiation, well-known for revolutionising photonic science, has been realised primarily in fermionic systems including widely applied diode lasers. The prerequisite for fermionic lasing is the inversion of electronic population, which governs the lasing threshold. More recently, bosonic lasers have also been developed based on Bose-Einstein condensates of exciton-polaritons in semiconductor microcavities. These electrically neutral bosons coexist with charged electrons and holes. In the presence of magnetic fields, the charged particles are bound to their cyclotron orbits, while the neutral exciton-polaritons move freely. We demonstrate how magnetic fields affect dramatically the phase diagram of mixed Bose-Fermi systems, switching between fermionic lasing, incoherent emission and bosonic lasing regimes in planar and pillar microcavities with optical and electrical pumping. We collected and analyzed the data taken on pillar and planar microcavity structures at continuous wave and pulsed optical excitation as well as injecting electrons and holes electronically. Our results evidence the transition from a Bose gas to a Fermi liquid mediated by magnetic fields and light-matter coupling.
KW  - Bose-Fermi
KW  - magnetic fields
KW  - Bose gas
KW  - Fermi liquid
KW  - light-matter coupling
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-168152
VL  - 6
IS  - 20091
ER  -