26 lines
664 B
Python
26 lines
664 B
Python
# These calculations are based on Ashkin's article "Forces of a single-beam
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# gradient laser trap on a dielectric sphere in the ray optics regime
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import numpy as np
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import matplotlib.pyplot as plt
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import seaborn as sns
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from functions import *
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sns.set()
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t = np.linspace(0, np.pi / 2, 1000)
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t_deg = t * 180 / np.pi
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pol = np.pi / 4
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plt.figure(figsize=(13, 8))
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plt.plot(t_deg, q_s(t, pol), '--', label='Q_s')
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plt.plot(t_deg, -q_g(t, pol), '-.', label='Q_g')
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plt.plot(t_deg, q_mag(t, pol), label='Q_t')
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plt.grid()
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plt.xlabel(r'$\theta$, deg', fontsize=18)
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plt.ylabel('Q', fontsize=18)
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plt.legend(fontsize=18)
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plt.title('Beam efficiencies', fontsize=20)
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plt.show()
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