• Chinese Optics Letters
  • Vol. 20, Issue 10, 100004 (2022)
Yuhang Chen1, Xiaosong Zhu1、*, Pengfei Lan1、**, and Peixiang Lu1、2
Author Affiliations
  • 1Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2Optics Valley Laboratory, Wuhan 430074, China
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    DOI: 10.3788/COL202220.100004 Cite this Article Set citation alerts
    Yuhang Chen, Xiaosong Zhu, Pengfei Lan, Peixiang Lu. Background-free detection of molecular chirality using a single-color beam [Invited][J]. Chinese Optics Letters, 2022, 20(10): 100004 Copy Citation Text show less

    Abstract

    We propose and numerically demonstrate a simple and background-free all-optical chiral spectroscopy technique for gas molecules. Our approach is based on high harmonic generation driven by a new type of laser beam that is produced by one linearly polarized single-color beam passing through a lens and a prism. It is shown that chiral and achiral signals are completely separated in frequency, indicating strong background-free and highly sensitive chirality detection. We believe this all-optical method can open new opportunities for ultrafast detection for chiral dynamics in the femtoseond to attosecond time scale.
    H^RΛ(t)=jj22+12ij1|rirj|+jVΛ(rj)+jE(t;R)·rj.

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    H^RΛ(t)ΨRΛ(t)=itΨRΛ(t),

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    pΛ(t;R)=ΨRΛ(t)|r|ΨRΛ(t).

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    p(t;R)=ΛpΛ(t;R).

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    H^R(t)=ΛH^RΛ(t),

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    S(Ω;R)=p¨(t;R)eiΩtdt,

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    E(t;R)=(E0x(R)cos(ωt+ϕx(R))0E0z(R)cos(ωt+ϕz(R))),

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    p(t;R)=nFn(R)exp(in2πtT),

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    τ^2·R^2ynFnexp(in2πtT)=nFnexp(in2πtT).

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    n(Fnx·(1)nFny·(1)nFnz·(1)n)=n(FnxFnyFnz).

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    n(Fnx(X,0,Z)Fny(X,0,Z)Fnz(X,0,Z))=n(Fnx(X,0,Z)Fny(X,0,Z)Fnz(X,0,Z)).

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    EZ,λq(X,Y)=eiπλqZ(X2+Y2)iλqZEh(X,Y)eiπλqZ(X2+Y2)ei2π(XX+YY)ZλqdXdY,

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    Yuhang Chen, Xiaosong Zhu, Pengfei Lan, Peixiang Lu. Background-free detection of molecular chirality using a single-color beam [Invited][J]. Chinese Optics Letters, 2022, 20(10): 100004
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