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UID:DSC-12487
DTSTART;TZID=Europe/Berlin:20170222T163000
SEQUENCE:1487749983
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20170222T173000
URL:https://dresden-science-calendar.de/calendar/en/detail/12487
LOCATION:MPI-PKS\, Nöthnitzer Straße 3801187 Dresden
SUMMARY:Photon statistics and non-equilibrium dynamics in photonic crystal 
 coupled nanolasers
CLASS:PUBLIC
DESCRIPTION:Speaker: \nInstitute of Speaker: \nTopics:\nPhysik\n Location:\
 n  Name: MPI-PKS (Room 1D1)\n  Street: Nöthnitzer Straße 38\n  City: 011
 87 Dresden\n  Phone: + 49 (0)351 871 0\n  Fax: \nDescription: We experimen
 tally and theoretically investigate the non-linear dynamics of evanescentl
 y coupled nanolasers and its impact in terms of bifurcations and photon st
 atistics. The nanolasers are fabricated in suspended 2D Photonic Crystal m
 embranes\, and studied as a function of pump power and coupling strength. 
 The modification of coupling strength is obtained by an original engineeri
 ng procedure that allows us to tune the coupling strength between the nano
 cavities without affecting the nanolaser performance [1].   I will focus o
 n two experiments. In the first one\, the cavities are pumped in a quasi-s
 tationnary regime. For certain conditions\, we are able to observe a parad
 igmatic classical bifurcation: the spontaneous mirror-symmetry breaking [1
 ]. This is the first experimental demonstration of such transition in micr
 o/nanophotonics. A pitchfork bifurcation reveals two localized states in t
 he cavities. The symmetry breaking bifurcation has been observed with only
  ~150 intracavity photons\, which makes this system promising to investiga
 te non-classical photon correlations and nonlinear dynamical phenomena wit
 h few photons.  In a second experiment\, the nanolasers are pumped in a no
 n-stationnary regime using short pulses [2] in order to investigate a new 
 route for the generation and control of long tailed superthermal light. We
  analyze the heavy-tailed photon distributions (super-exponential) whose f
 luctuations are greater than those of thermal states and link\, using a me
 an field model\, both the emergence of the heavy tails and the supertherma
 l nature of the nonlasing (symmetric\, in-phase) mode. We show that passin
 g through the lasing threshold corresponds to an abrupt decrease of the co
 ntribution of spontaneous emission —that plays the role of an effective 
 temperature— during which the statistics of the nanolaser trajectories i
 n phase space are dominated by nonlinear transport. Changing the duration 
 of this out-of-equilibrium quenching phase\, one obtains long-tailed distr
 ibutions for the unstable in-phase mode in agreement with the experimental
  results.
DTSTAMP:20260707T002237Z
CREATED:20170207T074750Z
LAST-MODIFIED:20170222T075303Z
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