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Tunable Atomic Line Monochromators for Brillouin Spectroscopy.
Tunable Atomic Line Monochromators for Brillouin Spectroscopy.

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자료유형  
 학위논문
Control Number  
0017160980
International Standard Book Number  
9798383182123
Dewey Decimal Classification Number  
535
Main Entry-Personal Name  
Hutchins, Romanus.
Publication, Distribution, etc. (Imprint  
[S.l.] : University of Maryland, College Park., 2024
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2024
Physical Description  
108 p.
General Note  
Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
General Note  
Advisor: Scarcelli, Giuliano.
Dissertation Note  
Thesis (Ph.D.)--University of Maryland, College Park, 2024.
Summary, Etc.  
요약Brillouin microscopy, a non-contact, spatially-resolved imaging method, provides insights into the mechanical information of samples. The first generation of Brillouin microscopes combined confocal microscopes and etalon-based spectrometers. In this setup, a confocal microscope scans a laser across the sample pixel-by-pixel, while the etalon spectrometer measures the Brillouin shift frequency at each pixel. Despite the extended image acquisition times in biological samples (20 ms/pixel), advancements have been made in the field to enhance the overall speed of Brillouin imaging. For example, line-scan Brillouin spectrometers use orthogonal detection to measure the Brillouin scattering at a row of pixels in a single shot. The pixel multiplexing in one-dimension (1D) improved the Brillouin imaging speeds 20-fold. Further multiplexing to two dimensions, or full-field spectroscopy, where the frequency domain is sequentially acquired but all the pixels in the field of view are simultaneously measured at each frequency, can further improve the average image acquisition time. However, there are currently no solutions for sub-picometer (sub-GHz) spectral resolution, two-dimensional (2D) multiplexing of Brillouin images.Here, I use the laser induced circular dichroism (LICD) effect in atomic vapors to create monochromators for 2D multiplexing at high spectral resolutions. These atomic line monochromators possess spectral resolutions dependent on the linewidth of the atomic resonance (~MHz), and they are ideal for pixel multiplexing because they have spectral analysis capabilities that do not depend on the spatial separation of spectral components. First, I present a full characterization of a tunable atomic line monochromator. I measure the transmission, spectral resolution, and spectral tunability of the device, as well as demonstrate whole-image transmission through the atomic line monochromator. Next, for practical implementations of the device to Brillouin spectroscopy, I created an atomic line monochromator based on a ladder-type atomic transition. This iteration of the device suffers from less noise than the previous version, leading to the first Brillouin measurements with this device. Finally, I present the first full-field Brillouin microscope by demonstrating whole Brillouin imaging with orthogonal detection with an atomic line monochromator.
Subject Added Entry-Topical Term  
Optics.
Subject Added Entry-Topical Term  
Analytical chemistry.
Subject Added Entry-Topical Term  
Bioengineering.
Index Term-Uncontrolled  
Monochromator
Index Term-Uncontrolled  
Brillouin images
Index Term-Uncontrolled  
Spectroscopy
Index Term-Uncontrolled  
Brillouin microscopy
Index Term-Uncontrolled  
Atomic resonance
Added Entry-Corporate Name  
University of Maryland, College Park Bioengineering
Host Item Entry  
Dissertations Abstracts International. 86-01B.
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:653983

MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a535
■1001  ▼aHutchins,  Romanus.
■24510▼aTunable  Atomic  Line  Monochromators  for  Brillouin  Spectroscopy.
■260    ▼a[S.l.]▼bUniversity  of  Maryland,  College  Park.  ▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a108  p.
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-01,  Section:  B.
■500    ▼aAdvisor:  Scarcelli,  Giuliano.
■5021  ▼aThesis  (Ph.D.)--University  of  Maryland,  College  Park,  2024.
■520    ▼aBrillouin  microscopy,  a  non-contact,  spatially-resolved  imaging  method,  provides  insights  into  the  mechanical  information  of  samples.  The  first  generation  of  Brillouin  microscopes  combined  confocal  microscopes  and  etalon-based  spectrometers.  In  this  setup,  a  confocal  microscope  scans  a  laser  across  the  sample  pixel-by-pixel,  while  the  etalon  spectrometer  measures  the  Brillouin  shift  frequency  at  each  pixel.  Despite  the  extended  image  acquisition  times  in  biological  samples  (20  ms/pixel),  advancements  have  been  made  in  the  field  to  enhance  the  overall  speed  of  Brillouin  imaging.  For  example,  line-scan  Brillouin  spectrometers  use  orthogonal  detection  to  measure  the  Brillouin  scattering  at  a  row  of  pixels  in  a  single  shot.  The  pixel  multiplexing  in  one-dimension  (1D)  improved  the  Brillouin  imaging  speeds  20-fold.  Further  multiplexing  to  two  dimensions,  or  full-field  spectroscopy,  where  the  frequency  domain  is  sequentially  acquired  but  all  the  pixels  in  the  field  of  view  are  simultaneously  measured  at  each  frequency,  can  further  improve  the  average  image acquisition  time.  However,  there  are  currently  no  solutions  for  sub-picometer  (sub-GHz)  spectral  resolution,  two-dimensional  (2D)  multiplexing  of  Brillouin  images.Here,  I  use  the  laser  induced  circular  dichroism  (LICD)  effect  in  atomic  vapors  to  create  monochromators  for  2D  multiplexing  at  high  spectral  resolutions.  These  atomic  line  monochromators  possess  spectral  resolutions  dependent  on  the  linewidth  of  the  atomic  resonance  (~MHz),  and  they  are  ideal  for  pixel  multiplexing  because  they  have  spectral  analysis  capabilities  that  do  not  depend  on  the  spatial  separation  of  spectral  components.  First,  I  present  a  full  characterization  of  a  tunable  atomic  line  monochromator.  I  measure  the  transmission,  spectral  resolution,  and  spectral  tunability  of  the  device,  as  well  as  demonstrate  whole-image  transmission  through  the  atomic  line  monochromator.  Next,  for  practical  implementations  of  the  device  to  Brillouin  spectroscopy,  I  created  an  atomic  line  monochromator  based  on  a  ladder-type  atomic  transition.  This  iteration  of  the  device  suffers  from  less  noise  than  the  previous  version,  leading  to  the  first  Brillouin  measurements  with  this  device.  Finally,  I  present  the  first  full-field  Brillouin  microscope  by  demonstrating  whole  Brillouin  imaging  with  orthogonal  detection  with  an  atomic  line  monochromator.
■590    ▼aSchool  code:  0117.
■650  4▼aOptics.
■650  4▼aAnalytical  chemistry.
■650  4▼aBioengineering.
■653    ▼aMonochromator
■653    ▼aBrillouin  images
■653    ▼aSpectroscopy
■653    ▼aBrillouin  microscopy
■653    ▼aAtomic  resonance
■690    ▼a0752
■690    ▼a0202
■690    ▼a0486
■71020▼aUniversity  of  Maryland,  College  Park▼bBioengineering.
■7730  ▼tDissertations  Abstracts  International▼g86-01B.
■790    ▼a0117
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160980▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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