TY - GEN
T1 - Electromagnetic angular momentum of quantized wavepackets in free space
AU - Mansuripur, Masud
N1 - Publisher Copyright: © 2023 SPIE.
PY - 2023
Y1 - 2023
N2 - A single electromagnetic plane-wave propagating in free space possesses neither spin nor orbital angular momentum. Both types of angular momentum arise from interference between pairs of plane-waves having the same temporal frequency ω but differing k-vectors k1 and k2. While it is fairly straightforward to evaluate a wavepacket’s spin and orbital angular momenta in the (k, ω) continuum by means of Fourier transformation, obtaining the same results by discretizing the (k, ω) space, then attempting to approach the continuum limit via an infinite enlargement of the spatial volume under consideration, is fraught with danger.
AB - A single electromagnetic plane-wave propagating in free space possesses neither spin nor orbital angular momentum. Both types of angular momentum arise from interference between pairs of plane-waves having the same temporal frequency ω but differing k-vectors k1 and k2. While it is fairly straightforward to evaluate a wavepacket’s spin and orbital angular momenta in the (k, ω) continuum by means of Fourier transformation, obtaining the same results by discretizing the (k, ω) space, then attempting to approach the continuum limit via an infinite enlargement of the spatial volume under consideration, is fraught with danger.
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U2 - 10.1117/12.2675775
DO - 10.1117/12.2675775
M3 - Conference contribution
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Trapping and Optical Micromanipulation XX
A2 - Dholakia, Kishan
A2 - Spalding, Gabriel C.
PB - SPIE
T2 - Optical Trapping and Optical Micromanipulation XX 2023
Y2 - 20 August 2023 through 24 August 2023
ER -