Controlled light shaping via phase dependent electromagnetically induced transparency
Închide
Articolul precedent
Articolul urmator
731 20
Ultima descărcare din IBN:
2023-11-04 15:39
Căutarea după subiecte
similare conform CZU
537.8.029 (3)
Electromagnetism. Câmp electromagnetic. Electrodinamică (60)
SM ISO690:2012
DEY, T. N.. Controlled light shaping via phase dependent electromagnetically induced transparency. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 35.
EXPORT metadate:
Google Scholar
Crossref
CERIF

DataCite
Dublin Core
Materials Science and Condensed Matter Physics
Ediția 9, 2018
Conferința "International Conference on Materials Science and Condensed Matter Physics"
9, Chișinău, Moldova, 25-28 septembrie 2018

Controlled light shaping via phase dependent electromagnetically induced transparency

CZU: 537.8.029

Pag. 35-35

Dey T. N.
 
Indian Institute of Technology Guwahati, Assam
 
 
Disponibil în IBN: 14 ianuarie 2019


Rezumat

In past few decades, spatial manipulation of beams carrying orbital angular momentum (OAM) [1] has gained a lot of attention owing to its immense application in micro-trapping, optical micromanipulation, optical communications, and biosciences. Control of the beam structure is generally carried out using various optical elements such as axially-symmetric polarization elements, porro-prism, and spatial light modulators (SLM). These techniques are limited by sub-diffraction resolution. In this presentation, we propose atomic coherence based sculpted light formation which offers high tunability as the shape and size of the formed structured probe can easily be manipulated by a transverse magnetic field (TMF) strength and intensity pattern of the control beam. For implementation, we adopt a scheme to selectively generating various structured beams by exploiting OAM of probe beam and spatially dependent control field (see Fig. 1). Fig.1 Schematic diagram of the inverted-Y level system of 87Rb atoms.  A strong control field with Rabi frequency G couples the transition |4⟩ ↔ |5⟩. The transitions |4⟩ ↔ |1⟩ and |4⟩ ↔ |3⟩ are coupled by the probe field components with Rabi frequency g+ and g− , respectively. A weak TMF, Bsin θ, with θ << π/2, is applied for coupling between Zeeman sub-levels |1⟩ ↔ |2⟩ and |2⟩ ↔ |3⟩. A TMF and a suitable spatially inhomogeneous control field can be used to create a spatial probe transparency modulation at a desired location. Such transparency modulation is the principle behind the shaping of the light. Further, the beam propagation equation shows that the control field-induced selective phase information can be imprinted on the probe beam. Hence this controlled light shaping paves a new way for high contrast imaging, laser micromachining, creation of optical lattices and optical tweezers.