Calendar

Feb
14
Thu
Distinguished Lecture Series: Victor Klimov, Los Alamos National Laboratory (The Minkowski Lecture) @ Hodson Hall 210
Feb 14 @ 3:00 pm – 4:00 pm

Abstract: Chemically synthesized quantum dots (QDs) can potentially enable new classes of
highly flexible, spectrally tunable lasers processible from solutions [1,2]. Despite a considerable progress over the past years, colloidal-QD lasing, however, is still at the laboratory stage and an important challenge – realization of lasing with electrical injection – is still unresolved. A major complication, which hinders the progress in this field, is fast nonradiative Auger recombination of gain-active multicarrier species such as trions (charged excitons) and biexcitons [3,4]. Recently, we explored several approaches for mitigating the problem of Auger decay by taking advantage of a new generation of core/multi-shell QDs with a radially graded composition that allow for considerable (nearly complete) suppression of Auger recombination by “softening” the electron and hole confinement potentials [5,6]. Using these specially engineered QDs, we have been able to realize optical gain with direct-current electrical pumping [7], which has been a long-standing goal in the field of colloidal nanostructures. Further, we apply these dots to practically demonstrated the viability of a “zero-threshold-optical-gain” concept using not neutral but negatively charged particles wherein the pre-existing electrons block either partially or completely ground-state absorption [8]. Such charged QDs are optical-gain-ready without excitation and, in principle, can exhibit lasing at vanishingly small pump levels. All of these exciting recent developments demonstrate a considerable promise of colloidal nanomaterials for implementing solution-processible optically and electrically pumped laser devices operating across a wide range of wavelengths.

Feb
17
Sun
2019 Engineers Week
Feb 17 – Feb 23 all-day
Mar
20
Wed
Conference on Information Sciences and Systems (CISS)
Mar 20 – Mar 22 all-day
Mar
21
Thu
Homewood Schools’ PhD Hooding Ceremony @ Homewood Campus
Mar 21 @ 3:00 pm – 4:30 pm

This event honors our students who have completed or are completing doctoral degrees from summer 2018 through spring 2019, and recognizes not only their years of hard work and creativity, but also the devoted advisers who mentored and inspired them.

During the ceremony, advisers will hood each student as a public symbol of the student’s imminent doctoral status. This formal ceremony, which also includes family members and friends, is an ideal way to acknowledge and honor the hard work of each student and adviser before students head out into the world.

Apr
5
Fri
Alumni Weekend
Apr 5 – Apr 7 all-day
Apr
11
Thu
Distinguished Lecture Series: Lihong Wang, California Institute of Technology (Kouwenhoven Lecture) @ Hodson Hall 210
Apr 11 @ 3:00 pm – 4:00 pm
May
2
Thu
Seminar: Martin Styner, University of North Carolina @ Shaffer Hall 2
May 2 @ 3:00 pm
May
6
Mon
ECE Spring Assembly @ Hodson Hall
May 6 @ 12:00 pm – 2:00 pm
May
7
Tue
ECE Networking Event
May 7 @ 5:00 pm – 7:00 pm
May
8
Wed
External Advisory Committee
May 8 all-day
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