Orientational ratchets and angular momentum balance in the janossy effect

P. Palffy-Muhoray; E. Weinan

doi:10.1080/10587259808024395

Orientational ratchets and angular momentum balance in the janossy effect

P. Palffy-Muhoray, E. Weinan

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

In the Janossy effect, the threshold intensity for the optical Freedericksz transition in nematic liquid crystals is dramatically reduced by the addition of a small amount of dichroic dye to the sample. We examine the source of torques in the system and the balance of angular momentum. We show that, due to the presence of the dye, the system is an optically pumped orientational ratchet.

Original language	English (US)
Pages (from-to)	193-206
Number of pages	14
Journal	Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume	320
DOIs	https://doi.org/10.1080/10587259808024395
State	Published - 1998
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Keywords

Angular momentum balance
Brownian motor
Dye
Janossy effect
Liquid crystals
Nonlinear optics
Orientational ratchet

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10.1080/10587259808024395

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title = "Orientational ratchets and angular momentum balance in the janossy effect",

abstract = "In the Janossy effect, the threshold intensity for the optical Freedericksz transition in nematic liquid crystals is dramatically reduced by the addition of a small amount of dichroic dye to the sample. We examine the source of torques in the system and the balance of angular momentum. We show that, due to the presence of the dye, the system is an optically pumped orientational ratchet.",

keywords = "Angular momentum balance, Brownian motor, Dye, Janossy effect, Liquid crystals, Nonlinear optics, Orientational ratchet",

author = "P. Palffy-Muhoray and E. Weinan",

note = "Funding Information: We acknowledge useful discussions with T. Kosa and A. Saupe. We1 acknowledge support from AFOSR under grant No. F49620-95-1-0065 (W.E) and from the NSF under ALCOM grant No. 89-DMR20147 and A4FOSR MUR.1 grant No. F49620-17-1-0014 (P.P-M.).",

year = "1998",

doi = "10.1080/10587259808024395",

language = "English (US)",

volume = "320",

pages = "193--206",

journal = "Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals",

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TY - JOUR

T1 - Orientational ratchets and angular momentum balance in the janossy effect

AU - Palffy-Muhoray, P.

AU - Weinan, E.

N1 - Funding Information: We acknowledge useful discussions with T. Kosa and A. Saupe. We1 acknowledge support from AFOSR under grant No. F49620-95-1-0065 (W.E) and from the NSF under ALCOM grant No. 89-DMR20147 and A4FOSR MUR.1 grant No. F49620-17-1-0014 (P.P-M.).

PY - 1998

Y1 - 1998

N2 - In the Janossy effect, the threshold intensity for the optical Freedericksz transition in nematic liquid crystals is dramatically reduced by the addition of a small amount of dichroic dye to the sample. We examine the source of torques in the system and the balance of angular momentum. We show that, due to the presence of the dye, the system is an optically pumped orientational ratchet.

AB - In the Janossy effect, the threshold intensity for the optical Freedericksz transition in nematic liquid crystals is dramatically reduced by the addition of a small amount of dichroic dye to the sample. We examine the source of torques in the system and the balance of angular momentum. We show that, due to the presence of the dye, the system is an optically pumped orientational ratchet.

KW - Angular momentum balance

KW - Brownian motor

KW - Dye

KW - Janossy effect

KW - Liquid crystals

KW - Nonlinear optics

KW - Orientational ratchet

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JO - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals

ER -

Orientational ratchets and angular momentum balance in the janossy effect

Abstract

All Science Journal Classification (ASJC) codes

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