Optical nanofibers are produced by gradually reducing an ordinary single-mode optical fiber to half-micron diameters, less than the typical wavelength we use at 780 nm. We have studied the optomechanical coupling between the angular momentum produced by polarized light and the torsional mode one of those nanofibers. We have observed significant changes, decrease and increase, in the thermal noise of the fundamental torsional mode depending on the angle of polarization with respect to the apparent birefringence axes of the nanofiber. We measure the thermal noise reductions with the Maxwell-Boltzmann distribution of amplitude fluctuations and show cooling by more than a factor of five from room temperature. This cooling happens to all the torsional modes and is free of any optical cavity, opening new avenues to optomechanical investigations.
This film screening of JFK: The Last Speech is part of Politics and Poetry: A Point/Counterpoint Series, hosted by Ilan Stavans. The virtual series examines our current crossroads, both nationally and globally, from the perspective of opinion writers, poets, activists, linguists and historians.
JFK The Last Speech explores the dramatic relationship between two seminal Americans—President John F. Kennedy and the poet Robert Frost—which reached its tragic climax in a surprising encounter with Soviet Premier Nikita Khrushchev at the height of the Cold War. Born out of these events is Kennedy’s remarkable speech about poetry and power, which alters the life course of a group of Amherst College classmates who witness this compelling address and continue to exemplify in their contemporary lives a portrait of challenges facing America.
Ilan Stavans is the Lewis-Sebring Professor of Humanities and Latin American and Latino Studies at Amherst and the publisher of Restless Books. His most recent books are The Seventh Heaven: Travels through Jewish Latin America (2019), How Yiddish Changed America and How America Changed Yiddish (2020) and Selected Translations: Poems 2000-2021 (2021). He is the recipient of numerous international awards and honors, and his work has been translated into 20 languages, and adapted into film, radio, TV and theater.