2008

Nonlinear optics at the nanoscale, at 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter (Lyon, France), Monday, July 7, 2008:

talk_1395.pdf

We explore nonlinear optical phenomena at the nanoscale by launching femtosecond laser pulses into long silica nanowires. Silica nanowires [1] provide strong mode confinement in a simple cylindrical silica-core/air-cladding geometry, representing a model system for the study of the nonlinear propagation of short pulses inside fibers. We observe supercontinuum generation by femtosecond laser pulses in silica fiber tapers of minimum diameters as small as 90 nm and we used loops of these wires to demonstrate light-by-light modulation.

Supercontinuum generation refers to extreme spectral...

Peer Instruction Workshop, at AAPT New Faculty Workshop, American Center for Physics (College Park, MD), Friday, June 27, 2008:

talk_1401.pdf

The basic goals of Peer Instruction are to encourage and make use of student interaction during lectures, while focusing students' attention on underlying concepts and techniques. The method has been assessed in many studies using standardized, diagnostic tests and shown to be considerably more effective than the conventional lecture approach to teaching. Peer Instruction is now used in a wide range of science and math courses at the college and secondary level. In this workshop, participants will learn about Peer Instruction, serve as the class in which Peer Instruction is demonstrated,... Read more about Peer Instruction Workshop

Introduction to Peer Instruction, at AAPT New Faculty Workshop, American Center for Physics (College Park, MD), Thursday, June 26, 2008:

talk_1402.pdf

I thought I was a good teacher until I discovered my students were just memorizing information rather than learning to understand the material. Who was to blame? The students? The material? I will explain how I came to the agonizing conclusion that the culprit was neither of these. It was my teaching that caused students to fail! I will show how I have adjusted my approach to teaching and how it has improved my students' performance significantly.

Introduction to Peer Instruction, at AAPT New Faculty Workshop, American Center for Physics (College Park, MD), Wednesday, June 25, 2008

Wrapping light around a hair, at RET/REU Seminar, Harvard University (Cambridge, MA), Tuesday, June 24, 2008

Can light be guided by a fiber whose diameter is much smaller than the wavelength of the light? Can we mold the flow of light on the micrometer scale so it wraps, say, around a hair? Until recently the answer to these questions was no. We developed a technique for drawing long, free-standing silica wires with diameters down to 50 nm that have a surface smoothness at the atomic level and a high uniformity of diameter. Light can be launched into these silica nanowires by optical evanescent coupling and the wires allow low-loss single-mode operation. They can be bent sharply, making it... Read more about Wrapping light around a hair

Confessions of a converted lecturer, at Canadian Association of Physicists Congress, Laval University (Quebec, Canada), Tuesday, June 10, 2008:

talk_1393.pdf

The interactive learning toolkit: technology and the classroom, at Canadian Association of Physicists Congress, Laval University (Quebec, Canada), Tuesday, June 10, 2008:

talk_1394.pdf

It has been suggested the lack of interaction in large lecture courses is to blame for the many problems facing these courses: declining enrollments, low attendance, poor evaluations, and disappointing retention. We offer a way of redesigning the classroom so interaction is introduced in many aspects of the course. This approach has shown to be effective by many instructors in a broad variety of environments. I will demonstrate some of the tools we have developed to foster this interaction.

Femtosecond laser doping of silicon: Electronic structure, at CLEO 2008 (San Jose, CA), Thursday, May 8, 2008:

talk_1442.pdf

Shining intense, ultrashort laser pulses on the surface of a crystalline silicon wafer drastically changes the optical, material and electronic properties of the wafer. The resulting textured surface is highly absorbing and looks black to the eye. The properties of this 'black silicon' make it useful for a wide range of commercial devices. In particular, we have been able to fabricate highly-sensitive PIN photodetectors using this material. The sensitivity extends to wavelengths of 1600 nm making them particularly useful for applications in communications and remote sensing. We have performed... Read more about Femtosecond laser doping of silicon: Electronic structure

Control of coherent optical phonons, at Research Seminar, Yale University (New Haven, CT), Thursday, April 24, 2008:

talk_1392.pdf

Using time-resolved reflectometry we measure the dielectric function of tellurium following excitation with a femtosecond laser pulse. The dielectric function reveals the ultrafast dynamics of coherent phonons in Te. Oscillations in the bonding-antibonding splitting allow for THz modulation of a semiconductor-semimetal transition. Using two-pulse sequences, we can control the phonons, stabilizing the bandstructure in the semimetallic state.

Confessions of a converted lecturer, at Science Education Lunch Seminar, Yale University (New Haven, CT), Thursday, April 24, 2008:

talk_1391.pdf

2008

Pages

Filter by taxonomy

Presenter

Research Areas

Talk Type

Recent Presentations

MAZUR GROUP

Home
Employment

Preprints
Hot Downloads

HARVARD UNIVERSITY

Harvard John A. Paulson SEAS
Department of Physics

MAILING ADDRESS

Prof. Eric Mazur, Department of Physics
Harvard University, Cambridge, MA 02138

css_talks_background_img

css_home_header