자료유형  

 학위논문

Control Number  

0017165066

International Standard Book Number  

9798346784821

Dewey Decimal Classification Number  

553.7

Main Entry-Personal Name  

Howard, Andrew James.

Publication, Distribution, etc. (Imprint  

[S.l.] : Stanford University., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

127 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-06, Section: B.

General Note  

Advisor: Bucksbaum, Philip H.

Dissertation Note  

Thesis (Ph.D.)--Stanford University, 2024.

Summary, Etc.  

요약Achieving "coherent control" is an ambitious and enduring goal among atomic, molecular, and optical physicists. The idea is to use light as a precision tool to direct and manipulate the motion of electrons, atoms, and molecules, breaking and forming chemical bonds at will. After a century of study since the inception of quantum mechanics, the scientific community now understands many of the underlying principles well; the difficulty is that simulating many-body quantum physics using these principles quickly becomes computationally intractable. To this end, experimental investigations using light to understand, measure, and control many-body quantum systems are extremely valuable.Here we present advancements toward coherent control using intense, ultrafast laser pulses of infrared (IR) light in a model system: water (H2O, D2O, and HOD). We begin by demonstrating how sufficiently short IR pulses can uncover nuclear dynamics in water that manifest in only tens of femtoseconds (1 fs = 10−15s). Then, we show how pairs of ultrashort IR pulses can precisely probe this system, effectively "filming" the femtosecond-scale nuclear dynamics. Finally, we demonstrate how a complete understanding of the nuclear dynamics allows us to use light to steer the electrons in the direction we want them to go: selectively ionizing along a particular bond. In each of these studies, we drive nuclear dynamics in water by strong-field ionization and use a sophisticated single-particle detector (known as a velocity map imager) to measure the time-resolved three-dimensional momentum of the charged fragments that are produced. Our work culminates in a promising pitch for using strong-field ionization to track and direct the motion of the electrons and atoms within molecules on the femtosecond timescale.

Subject Added Entry-Topical Term  

Water.

Subject Added Entry-Topical Term  

Physics.

Subject Added Entry-Topical Term  

Geometry.

Added Entry-Corporate Name  

Stanford University.

Host Item Entry  

Dissertations Abstracts International. 86-06B.

Electronic Location and Access  

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Control Number  

joongbu:658496