Investigating the response of a light-dependent resistor to structured light

Authors

  • Nina Zambale Simon ⋅ PH National Institute of Physics, University of the Philippines Diliman
  • Rhenish Simon ⋅ PH Physics Department, De La Salle University, Manila
  • Nathaniel Hermosa ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We show that the response of a light-dependent resistor (LDR) is not only influenced by the intensity and wavelength of the incident light but also by the spatial structure of light striking the LDR's surface. By modeling the LDR as an amplitude-type mask and using numerical simulations, we demonstrate that aligning the spatial structure of the incident light with the LDR's orientation leads to higher conductivity. We confirm these numerical results by constructing a proof-of-concept experiment using a voltage divider circuit and an SLM which changes the spatial structure of the incident light. This highlights the importance of considering spatial characteristics in LDR response and opens up possibilities for the potential of LDR in optical sensing applications.

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Issue

Article ID

SPP-2023-PC-20

Section

Poster Session C (Mathematical Physics, Optics, and Interdisciplinary Topics)

Published

2023-07-09

How to Cite

[1]
NZ Simon, R Simon, and N Hermosa, Investigating the response of a light-dependent resistor to structured light, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-PC-20 (2023). URL: https://proceedings.spp-online.org/article/view/SPP-2023-PC-20.