A review on the recent progress on photodetectors

Abstract

Photodetectors play a pivotal role in modern technology, particularly in applications requiring precise light detection and imaging. Traditional photodetectors, however, are often constrained by their fixed wavelength ranges, making them inadequate for multi-band detection needs. To address this limitation, phase change materials (PCMs) have emerged as a promising solution. PCMs are notable for their high sensitivity, rapid response times, and their capacity to detect a broad spectrum of wavelengths. These materials can transition between crystalline and amorphous states, allowing real-time adjustment of the detection wavelength. Furthermore, integrating surface plasmon resonance with photodetectors significantly enhances their performance by boosting light absorption and signal strength. This review delves into the fundamental principles, benefits, and challenges of various types of photodetectors. It specifically highlights traditional photodetectors, plasmon-enhanced photodetectors, and recent advancements in PCM-based photodetectors. By examining these innovations, we aim to provide valuable insights that could shape the future development and application of photodetector technology, ensuring they meet the evolving demands of various technological fields.